Insallaion & echnical Handbook for Marsh Indusries Producs Page 4 Ensign Sewage Plan, Uni:Gem and Five Filer Insallaion 6 Ulra Polylok Insallaion 8 Sepic ank Insallaion 10 Marsh Ensign ank Dimensions 12 Pump Chamber Insallaion 13 Land Drain Percolaion Procedure 15 Desludge Deails For Marsh Sewage reamen Plans and Uni:Gem A Member of www.marshindusries.co.uk 1 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 1 05/09/2012 14:51
Inroducion. Our producs are manufacured o he UK s and European s highes sandards and o he Qualiy sandards, ISO 9001:2000. Marsh Indusries Limied, occupies a unique posiion in he field of reinforced plasics, having he echnical experise and experience gained from over 30 years in he Consrucion Indusry in he Unied Kingdom. he experience places Marsh Indusries in a posiion o offer an advanced range of superior producs and sysems o mee he requiremens of is cusomers Our produc range can be pu ino service immediaely as is pre-commissioned, once he insallaion insrucions have been fully complied wih. hey should be checked once he elecrical connecion is compleed, o ensure ha i is running correcly. For sewage plans you should hear a hum from he blower and here will be bubbles of air coming up hrough he waer. If he elecrical connecions are no compleed correcly, he sysem will no run and a criical failure may resul. Always refer o he elecrical drawings in his handbook and supplied wih he sysem. In he case of sysems no being wired up correcly, warranies will be null & void. P Sewage & Sepic ank Ranges Only Please Do. Ensure ha all of he informaion conained in he handbook is adhered o a all imes. he end user (no he purchaser) of he plan is responsible for he operaion and mainenance of he sysem and is discharge eiher direc o a waercourse or hrough a percolaion area. I is imporan ha he produc is operaed under he condiions for which i is designed. Any variaion in hese condiions could lead o he uni no performing o is full poenial and he discharge may no mee he required sandards. Ensure ha he sysem has been insalled correcly, in accordance wih he manufacurers specificaions. Ensure ha he air blower has been wired up, by a compeen elecrician. Pre-Commissioned plan: Once i is pu ino use (plumbed o he house and elecrical wiring compleed) i is now up and running. Check ha here is a hum from he blower and ha here are bubbles rising from he middle chamber. Mainain he sysem in accordance wih secion his handbook. Servicing is mechanical only, and does no include de-sludging (empying of he sysem). You mus desludge he sysem in accordance wih he guidelines laid down in his handbook. Soak ways, drains and he empying of primary anks remain he responsibiliy of he clien and damage o he insallaion due o he influx of surface waer or he backing up of soak ways or drains is no covered by his service agreemen. F L M d H s s M 2 www.marshindusries.co.uk w 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 2 05/09/2012 14:51
Phone Marsh Indusries if you have any echnical queries regarding he mainenance and servicing of your sysem. Please Don. Aler in any way, any par of he sysem or inernal pars supplied wih he sysem. Open he plan cover wihou firsly isolaing he mains power. Marsh Indusries Limied shall no be liable for any damage or loss, including consequenial loss, caused by he failure of any plumbing equipmen or failure caused by he inclusion of gross solids, (e.g. disposable diapers or saniary owels ec) in he wase waer reamen uni. o ensure he coninuance of he sysems performance, he user has o ake cerain precauions including he following: he design loading of he plan should no be exceeded. High volume discharges such, as hose from swimming pools and Jacuzzi s mus never ener he sysem. Surface waer mus no ener he sysem. Do no allow large quaniies of chemicals o ener he sysem including: ~ Waer sofener regenerae. ~ Disinfecans. ~ Srong Acids and Alkalis. ~ Oil or Grease. ~ Pesicides. ~ Phoographic Chemicals. For Guidance Only Locaing he Sepic anks & Sewage Plan Minimum disances for locaing Sewage Plan are se ou below. hese are minimum disances only; he uni should in fac be locaed as far away as is pracically possible. However, when locaing he uni, consideraion should be given o allow adequae access for he vacuum anker. he uni should be locaed no nearer han 7m from any oher dwelling as se ou in he wasewaer reamen manual. Guidelines of minimum disances for locaing he sewage plan are se ou in he able below. Any dwelling Waercourse or sream Spring or well Lake Sie boundary Road Slope, break or cus he Plan 7m 10m 30m 50m 3m 4m 4m Percolaion area 10m 10m 30m 50m 3m 4m 4m Minimum separaion disances in meres www.marshindusries.co.uk 3 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 3 05/09/2012 14:51
4 Marsh Ensign & Uni:Gem & Five Filer Insallaion Deail he Insallaion & Elecrical Connecions Mus Be Underaken By Fully Qualified Personnel. Under he Guidance of he Healh & Safey a Work Ac. Selec a suiable locaion for he sewage plan (s). his will be normally a a ground level lower han he properies being drained and allow for he falls in sie drainage. Check ha no oher srucure or special access is required over he seleced spo. Check ha no underground cable, pipe or service duc, lies underneah. In normal o good ground condiions he plan requires a 150mm Concree Base wih a 150mm pea-shingle surround o he op of ank. Excavae he minimum opening in he ground o receive he plan and pipe work o be used. his opening should be 150mm wider and deeper han he sewage plan in normal/good ground condiions. he sides of he excavaion should be baened for sabiliy. Fill wih clean waer o overcome he effec of buoyancy as you pour he pea-shingle surround consolidaing around he base of he plan. Place furher pea-shingle as before, a leas 150mmm hick around he chambers or shafs. In areas of high waer, shifing running sand or waer logged sies a polyehylene membrane mus be fied beween a 250mm hard core base and he concree. A dewaering pump mus be used o conrol any ground waer presen unil he concree backfill is se. In we or high waer able sies/ground condiions he plan requires a 250mm Concree Base wih a 250mm concree surround o he op of ank. Excavae he minimum opening in he ground o receive he plan and pipe work o be used. his opening should be 250mm wider and deeper han he sewage plan in hese ground condiions. Place in posiion he mass concree base, minimum hickness 250mm of CP 25Kn/mm 2 srengh. Lower he pump chamber ono he damp concree allowing he base o sele in, ensuring ha he inle and oule pipes are correcly aligned. Fill he anks evenly from boh ends of each uni, or in muliple chambers hrough each urre evenly. Wih clean waer o overcome he effec of buoyancy as you pour he concree consolidaing he concree around he base of he plan. Place furher mass concree, as before, a leas 250mmm hick around he chambers o jus below he op of he pipe connecions. Consolidae he concree, being careful no o damage he ank or ank inle/oule pipes. Where here are muliple anks here mus be a minimum of 450mm disance beween he anks his 450mm void mus be filled wih concree during he pouring. Do no under any circumsance use vibraing pokers. Use warning signs around he access urres. Connec up he sie pipe work o he inle and oule of he plan, and draw he cables and nylon diffuser ubing hrough he ducing from he pump/s diffuser and high level alarm if included. Ensure he sewage plan is fully venilaed connecing 110mm pipe o he air ven pors on he ank Finish off he surface a he required level, depending on he final ground cover required i.e. opsoil, armac, gravel ec. I is mos imporan ha once he sewage plan is in siu wih all he inle connecions made, he drainage sysem should be flushed ou, and all sand, debris ec. removed from he sewage plan. www.marshindusries.co.uk * n 1 e o N r F m l c S A o i A d C A e A m i C M c b h o c h a w 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 4 05/09/2012 14:51
** For Uni:Gem insallaion ensure he sepic ank is vened and he head of he soil run is no vened via an air admiance valve, o avoid odour escaping from he speic ank (when he solids sre disurbed by incoming sewage from he dwelling) i may be advisable o fi a 100mm non-reurn valve beween he sepic ank (drainage pipe) and he Uni:Gem. Please ensure he Uni:Gem is vened wih a 4 (110mm) pipe, he 4 air por is predrilled in he op of he Uni:Gem. Non vehicle loading he plans are designed for a minimum cover of 600mm of backfill or 300mm plus 100mm reinforced concree slab. Vehicle Loading Car Axle Weigh 10 onne Maximum. For vehicle loading he anks mus have a minimum cover of 750mm of backfill plus a minimum 200mm reinforced concree slab designed o ake he maximum load wihou such loadings being ransferred o he ank iself for his applicaion a srucural engineer mus be consuled. he elecrical insallaion of he uni. All 230v. Single Phase. Sandard Graviy sysem wih Air blower: hese will conform o European Sandards. All elecrical work o be carried ou by a qualified elecrician, he work mus be carried ou sricly o he manufacurer s insrucions and o he relevan naional rules for elecrical insallaions. A 230V, 6 Amp, waer proof plug and socke connecor will be supplied wih his uni. he cusomers minimum responsibiliy shall consis in he provision of: A single run of 1.5mm (or greaer han 1.5mm dependen on disance) wo core + earh wo conducors plus earh conducor seel wire armoured (SWA) cable from he cusomers disribuion cabine o he ank uni socke. Cable proecion via 10 amp MCB proeced by residual curren deecor (RCD), raed 230V, AC and ripping curren 0.03amps. he cable armour mus be properly bonded o he main earh a he premises. A conrol panel wih alarm is available a an addiional cos. Please refer o he manufacurer for furher deails. Once commissioned, do no disconnec he air pump. I is imperaive ha i is running 24 hours a day. Compressor alarm Make a small hole 1/16h of inch ino he clear nylon hose ha is conneced o he compressor, he hole should be wo inches from he acual poin where he hose connecs o he compressor, he uni is supplied wih a small free of charge black alarm, his is normally baery powered, i can be wired. he small whie ee piece needs o be cable ied o he hose, afer he end opposie he valve opening is insered ino he small 1/16h hole. he one remaining end of he small whie ee piece is hen conneced o he small clear hose ha hen connecs o he silver por on he compressor alarm. Do no urn on he alarm unil he compressor is running, once running urn he alarm on if he whie valve is closed you will hear he alarm beep, and small red ligh will glow as you open he valve i will sop sounding and he ligh will urn green. A more sophisicaed alarm is available a an addiional cos of 350 +va www.marshindusries.co.uk 5 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 5 05/09/2012 14:51
Sysems wih and High Level Alarm and / or Pumped Oule All he elecrical work mus be carried ou by a fully qualified elecrician using suiable maerials for he applicaion. Elecrical work mus be a 230V, 6Amp, waerproof IP plug and socke connecor will be supplied wih his uni for he compressor and a separae IP plug and socke will be supplied for he pump and or high level alarm hese will conform o European Sandards. he cusomers minimum responsibiliy shall consis in he provision of: A single run of 1.5mm² four core + earh five conducors plus earh conducor seel wire armoured (SWA) cable from he cusomers disribuion cabine o he ank uni socke. Cable proecion 10 amp MCB proeced by residual curren deecor (RCD), raed 230V, AC and ripping curren 0.03amps. he cable armour mus be properly bonded o he main earh a he premises. A conrol panel wih alarm is available. Please refer o he manufacurer for furher deails. Leave he compressor running. I is imperaive ha i is running 24 hours a day, every day. Noe: he seel wired armoured cable is o be roued hrough 25mm glands in he pump chamber, hen o be erminaed o he juncion box. Connecions: One core from 3 o 3, Neural core from 4 o 4. One core from 5 o 5, One core from 6 o 6. Earh core from PE erminal o PE erminal. Elecricians Sysem Sar Up: Once he elecrical connecion has been pu in place beween he plan and he fuse board in he house, he sysem is now operaional. If he sysem is running correcly, a sligh hum will be heard from he air blower and here will be air bubbles coming up from he boom of he middle chamber, rising o he surface. Furher alarm opions, for high waer level or compressor power loss. We are pleased o be able o offer our cusomers, he proecion and peace of mind of an alarm sysem, specifically designed o proec your home. Various alarm sysems, o a variey of differen sandards & specificaions are available. Please consul wih Marsh Indusries, in order o ge an alarm sysem ha will sui your requiremens. Phone alarms are also available as an opional exra. Marsh Ulra Polylok Sewage Plan Insallaion Deail he Insallaion & Elecrical Connecions Mus Be Underaken By Fully Qualified Personnel. Under he Guidance Of he Healh & Safey A Work Ac. Insallaion of he Sewage reamen Plan. Noe: We recommend ha when he sysem arrives on sie ha i is inspeced for damage, from miss-handling ec. If any damage is seen or suspeced, please noify he manufacurer immediaely, as problems canno be recified easily afer insallaion. I is hen he responsibiliy of he homeowner or builder o underake he insalling of he Ulra Polylok, as per manufacurers insrucions. A suiably sized digger will be required o e m O W r c N m I I 6 www.marshindusries.co.uk w 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 6 05/09/2012 14:51
excavae he hole and lower he Ulra Polylok Sewage reamen Plan slinging poins are marked on he uni. Once a suiable sie has been chosen and excavaed he following seps mus be followed: When insallaion is compleed and he sysem filled wih waer and is plumbed o he relevan sewers ec, he elecrical insallaion mus be compleed. Only hen, can final commission of he sysem be compleed. Noe: waer logged sies. he Sewage reamen Plan should no be placed ino a waer logged sie. Please conac he manufacurer if here are difficulies on sie due o adverse waer logging. Insallaion of he Ulra Polylok. A parial concree insallaion is required for a dry sie. A dry sie is one where he waer able never rises higher han he base of he Ulra Polylok A complee concree backfill may be required for we sies. A We Sie is one where he waer able may rise higher han he base of he Ulra Polylok Sewage reamen plan. A complee concree backfill may also be required where he Ulra Polylok Sewage reamen plan may be prone o some superimposed load. Insallaion procedure. he Ulra Polylok shall be insalled a he required deph o accommodae incoming drainage pipes. Remove any sof spos or boulders or sharp objecs of any significan size (ennis ball) from he base and sides of he excavaion. A level graded base is hen formed using sand binding. A foundaion of semi dry concree is laid and levelled. he concree shall be of sufficien grade and hickness (minimum 200mm and grade 25 N) o ensure ha he Ulra Polylok is fully suppored wih due regard o subsoil condiions and loads imposed by he Ulra Polylok. Care shall be aken o eliminae voids. he sysem is lifed carefully ino posiion using slings in accordance wih he cerificae holder s insrucions. Care should be aken o preven damage o exernal flanges or pipe work and o ensure he CORREC ORIENAION of he inle and oule pipe work. hese are clearly marked on he sysem. Level he Ulra Polylok using a spiri level. he Ulra Polylok should be 100% level. he lip of he lid should si flush wih proposed finished level of he ground so jus he lid will prorude above ground. Line up he inle and oule pipes wih he drainage pipes and percolaion pipes respecively. he concree is hunched up around he base of he sysem. Ensure ha he fee are embedded. Ensure ha he op of he ank is dead level and ha all of he connecions are lined up correcly. As backfilling progresses, he sysem is progressively filled wih waer, o preven uplifing (sop he sysem popping ou of he ground). he backfilled concree is o be carefully compaced around he sysem, o ensure ransfer of ground loads and o preven concenraions. Vibraing pokers mus no be used, as hese may damage he GRP sysem. www.marshindusries.co.uk 7 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 7 05/09/2012 14:51
he remainder of he excavaion is hen backfilled, wih suiable seleced self-compacing Pea Gravel or suiable granular maerial (compacion facor of 0.2 or less), o he underside of he pipe work connecions. Ensure ha he connecions remain exposed. Connec up he pipe work. he Ulra Polylok Sewage reamen plan is plumbed for 160mm upvc pipe. A shor lengh of pipe wih flexible joins should be used immediaely before and afer he Ulra Polylok o allow for movemen beween he ank and he pipe work. A suiably qualified person should hen connec up he power according o he elecrical insallaion insrucion. Addiional requiremens for we sies. A we sie is a sie where he local waer able can rise above he base of he sysem. Insallaion in a we sie may be precluded by sie consideraions in relaion o effluen disposal. A 250mm hardcore sub-base is laid, compaced and levelled. he excavaion is kep dry, by pumping excess waer using a sie pump/sump, hole/ sucion hose arrangemen. Dewaering should be coninued for as long as necessary and a leas unil he concree has se. he excavaion is hen lined wih a coninuous layer of 1200 gauge polyehylene shee. he grade and hickness of he concree base should be designed o sui he sie condiions (minimum 250 mm hickness, grade 25N). Where here are muliple anks here mus be a minimum of 500mm disance beween he anks his 500mm void mus be filled wih concree during he pouring he sysem is o be insalled and he excavaion backfilled generally in accordance wih he requiremens for a dry sie from his poin on. he excavaion shall be backfilled wih concree o approx. 300mm below he ground level. Allowances mus be made for flexible joins a pipe connecions where necessary. Connec up he pipe work. he sysem is plumbed for 160mm upvc pipe. A shor lengh of pipe wih flexible joins should be used immediaely before and afer he Ulra Polylok o allow for movemen beween he ank and he pipe work. A suiably qualified person should hen connec up he power according o he elecrical insallaion insrucion. Marsh Polylok Filers Marsh Polylok Filers are fied in he final ouflow chambers please check he drawing for he posiioning of hese, hey need checking and cleaning on a regular basis normally once a monh. A high level alarm should be fied o aler he sie owner of when he filer needs cleaning. Sepic ank Insallaion All sie work should be underaken by qualified personnel only. Green Filer Sepic ank Sandard Insallaion Good Ground condiions **Please Noe Insallaion Deails For High Waer able In Good Ground no high waer able 150mm concree base 150mm surround. 1 2 3 4 5 6 7 8 9 1 1 F C O H D 8 www.marshindusries.co.uk w 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 8 05/09/2012 14:51
1) Selec a suiable locaion for he ank. his will be normally a ground level lower han he properies being drained and allow for he falls in sie drainage. 2) Check ha no oher srucure or special access is required over he seleced spo. Provision can always be made, if necessary, o place he ank on a roadway, provided ha proecive backfill is placed around i and a suiable heavy-duy manhole cover is used over he opening. 3 Check ha no underground cable, pipe or service duc, lies underneah. 4) Excavae he minimum opening in he ground o receive he chamber and pipe work and concree o be used. If a machine is used o remove he spoil, he sides of he excavaion should be baened for sabiliy and a sump lef in one corner for dewaering purposes if required. 5) he deph of excavaion needs o be a mos 500mm deeper han he overall ank deph. If i is dug by hand, he sides will require shoring up for safey, o preven earh slippage. 6) A dewaering pump MUS be used o conrol any ground waer presen unil he concree backfill is se. Dewaering mus be coninued unil he concree is fully se A we sie is where he local waer able can rise above he base of he uni 7) If he ank is o be insalled in a high waer able a polyehylene membrane 1200 gauge in a high waer able he base should be 250mm hick. In exreme cases of high waer, consideraion should be given o laying a 250mm hardcore sub-base before he concree. 8) In good ground place in posiion he mass concree base, minimum hickness 150mmof CP 25Kn/mm2 srengh. 9) Lower he chamber ono he damp concree allowing he base, o sele in, ensuring ha he inle and oule pipes are correcly aligned. Slowly fill he ank wih waer up o he inle pipe as he concree is poured. 10) Place furher mass concree, as before, a leas 150mm hick around he ank o jus below he op of he ank. Consolidae he concree around he op of he ank, being careful no o damage he ank or ank inle/oule pipes. 11) Connec up he sie pipe work o he inle and oule of he ank, buoyancy. Finish off he surface of he concree a he required level for he posiioning of he lid, depending on he final ground cover required i.e. opsoil, armac, gravel ec. For he Five Filer Ranges A Qualified Elecrician Mus Make he Connecions o he Compressor, 230V Single Phase he Compressor Can Be Sied Up o 10m From he ank. Opional Exras: High Level Alarm, Service Conracs, Commissioning Please Conac he Office For Deails www.marshindusries.co.uk 9 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 9 05/09/2012 14:51
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12 IMPORAN NOES I is mos imporan ha once he ank is in siu wih all he inle connecions made, he drainage sysem should be flushed ou, and all sand, debris ec. removed from he chamber. ADDIIONAL NOES If vehicular raffic will be passing over he chamber, i is ESSENIAL ha he cover slab is consruced so ha here is NO DIREC LOAD on he chamber. Also an access cover wih he correc specified S.M.W.L. mus be used. HE CONCREE BACKFILL IS DESIGNED O PROEC HE CHAMBER FROM EXERNAL GROUND & WAER PRESSURE. PLEASE ALLOW HE CONCREE BACKFILL O SE BEFORE PUMPING OU HE WAER IN HE CHAMBER. Annual Mainenance All Producs: Annual De-sludge & Inspecion Of he Percolaion Bed, Green Filer & Five Filer Ranges- Clean & Wash down he Polylok Filers And Refi. Marsh Pump Chamber Insallaion Deail he Insallaion & Elecrical Connecions Mus Be Underaken By Fully Qualified Personnel. Under he Guidance Of he Healh & Safey A Work Ac. Selec a suiable locaion for he ank(s). his will be normally a a ground level lower han he properies being drained and allow for he falls in sie drainage. Check ha no oher srucure or special access is required over he seleced spo. Check ha no underground cable, pipe or service duc, lies underneah. In normal o good ground condiions he plan requires a 150mm Concree Base wih a 150mm concree surround o he op of ank. Excavae he minimum opening in he ground o receive he plan and pipe work o be used. his opening should be 150mm wider and deeper han he pump chamber in normal/good ground condiions. he sides of he excavaion should be baened for sabiliy. Wih clean waer o overcome he effec of buoyancy as you pour he concree consolidaing he concree around he base of he plan. Place furher mass concree, as before, a leas 150mmm hick around he chambers o jus below he op of he pipe connecions. In areas of high waer, shifing running sand or waer logged sies a polyehylene membrane mus be fied beween a 250mm hard core base and he concree. A dewaering pump mus be used o conrol any ground waer presen unil he concree backfill is se. Place in posiion he mass concree base, minimum hickness 250mm of CP 25Kn/mm2 srengh. Lower he pump chamber ono he damp concree allowing he base o sele in, ensuring ha he inle and oule pipes are correcly aligned. Fill he anks evenly from boh ends of each uni, or in muliple chambers hrough each urre evenly. Wih clean waer o www.marshindusries.co.uk o c fi D c l i d N r V F m l c M A p F a N D r a A e p w 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 12 05/09/2012 14:51
overcome he effec of buoyancy as you pour he concree consolidaing he concree around he base of he plan. Place furher mass concree, as before, a leas 250mmm hick around he chambers o jus below he op of he pipe connecions. Consolidae he concree, being careful no o damage he ank or ank inle/oule pipes. Where here are muliple anks here mus be a minimum of 450mm disance beween he anks his 450mm void mus be filled wih concree during he pouring. Do no under any circumsance use vibraing pokers. Use warning signs around he access urres. Connec up he sie pipe work o he inle and oule of he plan, and draw he cables hrough he condui from he pump/s and high level alarm. Ensure he ank is fully venilaed connecing 110mm pipe o he air ven pors on he ank Finish off he surface a he required level, depending on he final ground cover required i.e. opsoil, armac, gravel ec. I is mos imporan ha once he pump chamber is in siu wih all he inle connecions made, he drainage sysem should be flushed ou, and all sand, debris ec. removed from he chamber Non vehicle loading. he plans are designed for a minimum cover of 600mm of backfill or 300mm plus 100mm reinforced concree slab. Vehicle Loading Car Axle Weigh 10 onne Maximum For vehicle loading he anks mus have a minimum cover of 750mm of backfill plus a minimum 200mm reinforced concree slab designed o ake he maximum load wihou such loadings being ransferred o he ank iself for his applicaion a srucural engineer mus be consuled. he concree surround needs o be 300mm around he enire ank. Marsh echnical Percolaion es Procedure A hole should be excavaed 300mm square o a deph approximaely 250mm below he proposed inver level of he land drain. Fill he 300mm square secion of he hole wih waer o a deph of a 250mm (minimum) and allow he waer o seep away overnigh. Nex day, refill he es secion wih waer o a deph of a leas 250mm and observe he ime aken, in seconds, for he waer o seep away compleely. Divide he ime by he deph (mm) of waer in he hole. he answer gives he average ime required for he waer o drop 1mm (Vp in scare should be aken, when carrying ou he es, o avoid abnormal weaher condiions such as heavy rain, severe fros or drough. his es should be repeaed a leas hree imes, and an average calculaed. If any of he resuls are 50%+/- he average, carry ou a furher hree ess and calculae a furher average. A saisfacory resul is an average value, Vp of 24s/mm or less. If he measured values exceed his, hen carry ou furher ess a a minimum of hree differen locaions on he proposed land drain roue, or a leas hree ess on separae days on he sie proposed for he soakaway. www.marshindusries.co.uk 13 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 13 05/09/2012 14:51
Where deep excavaions are necessary a modified es procedure may be adoped using a 300mm earh auger. Bore he es hole verically o he appropriae deph aking care o remove all loose debris. Make waer level observaions referring o a fixed daum using a dipsick or some suiable alernaive waer level indicaor. he value found In his way is called he percolaion value (Vp in s) of he soil and can be used o deermine he area of drainage rench floors required o disperse effluens. If he percolaion value exceeds 140s hen BS6297 considers ha he soil is no suiable for a soakaway sysem. he main facor for sub-surface irrigaion is he value as obained for he percolaion es. his will deermine he lengh of pipe needed in he percolaion area based on 450mm-meer wide renches. 1. values <5 may indicae a percolaion rae ha is oo fas. Consul he manufacurer for percolaion area sizing. 2. values >60 may indicae a percolaion rae ha is slow. Consul he manufacurer for percolaion area sizing. Esimaed number of people in he house based on number of bedrooms. Required lengh of rench (m) for /P values 21-50 (loading a 25 1/m 2.d) Required lengh of rench (m) for /P values 1-20 (loading a 50 1/m 2.d) 6 96 48 he reaed waer is discharged by graviy. A nework of 110mm perforaed pipes is laid in he percolaion. he percolaion area spreads he reaed waer evenly over a large area hus minimising he risk of he ground geing over sauraed. he lengh of percolaion pipe recommended should be sub-divided ino a number of equal lenghs. No rench should be longer han 20m. here should be a minimum disance of 2m beween any wo renches. he renches should be 450mm wide and 800 mm deep. he pipe should be laid on 250mm of clean 20mm sone. he pipe should be covered by anoher 150mm of sone. A layer of geoexile soil barrier should be placed on op of he sone and he remaining 300mm should be back filled wih opsoil. he pipes should be laid wih a fall of no more han 1 in 200. here should be a leas 1200mm of unsauraed soil from under he boom of he rench o he bedrock / waer able. M P S N i o Percolaion rench Characerisics. Noe: Always connec from he plan, o a correc Disribuion Box and hen ino he percolaion renches. Lengh of disribuion pipe, 20m maximum. Minimum separaion disance beween percolaion renches 2m (2.45 cenre o cenre). Diameer of pipe from sysem, 110mm. c I p 14 www.marshindusries.co.uk w 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 14 05/09/2012 14:51
Slope of pipe from ank o disribuion box. 1 in 40 for earhenware or concree. 1 in 60 for upvc. Slope of percolaion rench from disribuion box, 1 in 200. Disribuion (percolaion) pipes. 110mm bore, perforaed (ypically a 4, 6 and 8 o clock) smooh wall PVC drainage pips wih perforaions of 8mm diameer a abou 75mm cenres along he pipe or pipes wih similar hydraulic properies. Widh of percolaion rench, 450mm. Deph of percolaion rench is abou 800 mm below ground surface depending on he sie. Back-filling of percolaion rench. 250 mm of 20 o 30 mm washed gravel or broken sone aggregae on inver; pipe laid a 1 in 200 slope surrounded by 20-30 mm clean washed gravel or broken sone aggregae and widh 150 mm of similar aggregae over pipe: goeexile layer followed by opsoil o ground surface. Marsh De-sludge Deails For All Marsh Sewage Plans & Gems Please read all hese deails before underaking servicing or de-sludging. Servicing of all sewage plans should be underaken by a qualified service engineer. NOE: he air pump/compressors and elecric powermus never be urned off. I is imperaive ha i is lef running 24 hours a day, every day o ensure a consan supply of oxygen o he baceria in he second chamber. he sewage plan will require de-sludging and mainenance as designed; 6PE-35PE - Yearly or as required 40PE-100PE - Six monhly or as required 125P-300PE - 90 days he desludging of he plan is he responsibiliy of he sie owner. De-sludging should be carried ou according o he size of he plan and dependen on usage. I is he sie owner s responsibiliy o provide access for he vacuum anker, o de-sludge he plan. Never vehicles drive over he sysem. Keep a leas 4 meres away from he covers on he plan. www.marshindusries.co.uk 15 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 15 05/09/2012 14:51
1. Remove he de-sludging access cover by undoing he nus. he de-sludging cover can now be removed. De-sludging De-sludging is o be carried ou by ohers, no he Manufacurer of he Marsh Sewage reamen plan. De-sludging should normally be carried ou by a vacuum sludge anker. Never drive over he reamen sysem as i is only designed for Man weigh. When a sludge anker is o be used and access is poor, he ank should be de-sludged before he onse of winer. Licensed ankers are available commercially and he service is also provided by some local auhoriies. his sludge should be disposed of in accordance wih local auhoriy insrucions or in a manner which will no cause polluion. he sludge in he primary chamber(s) should no be removed compleely, bu approximaely 75mm should be kep in he boom of he ank o re-seed he new sludge, which will be formed when he ank is pu ino use again. On every alernaive de-sludge dead humus scum should be removed from he final selemen ank(s). Ensure he ee pieces in all chambers are clear. Care mus be aken no o damage he reamen plan wih he hose of he vacuum anker. Replace he de-sludging access cover and screws. Noes: he access cover should never be lef off while he uni is unaended De-sludging should never be carried ou alone he Sewage reamen plan should be clearly marked and vacuum anker should never come closer han he deph of he excavaion for he sysem unless he appropriae precauions have been aken. Conac he manufacurer for he correc precauions. he coninued performance of he plan will depend on regular mainenance and cleaning. I is he homeowner s responsibiliy o de-sludge he uni and keep he vens clear. Regular mainenance of he uni and percolaion area is very imporan for he saisfacory performance of he sysem. he deph of sludge can be checked using he following echnique: Use a pole ha can ouch he boom of he ank and wrap he boom 1.4m wih a whie rag. Lower he pole o he boom of he ank and hold for several minues o allow he sludge layer o penerae he rag. Remove he pole and noe he sludge line, which will be darker han he coloraion caused by he liquid wase. he percolaion area should be inspeced regularly. Noe: Signs of ponding indicae blockage or insufficien permeabiliy. I s p r S N s P m N s A a M n p s S m e 16 www.marshindusries.co.uk w 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 16 05/09/2012 14:51
Inspecion General. he inle manhole should be inspeced and any solid maer which may clog he inle ee pipe should be removed. he cause of any blockage should be invesigaed. Only qualified personnel should carry ou his. he inle and oule ee-pipes should be inspeced and rodded so ha scum does no collec and ha he verical leg is no obsruced. Safey Precauions. here is poenial danger when de-sludging and herefore should never be done alone. Never ener a ank unless a safey line is aached o he person enering he ank and a second person is above ground o help if he enran is overcome by gasses or foul air. Personnel enering he ank mus have suiable breahing equipmen and be fully rained in man enry echniques. Naked flames should no be used in he viciniy of he ank due o he danger of explosion. he manhole covers should never be lef off an unaended ank. Disused or abandoned anks should be demolished, filled in or sealed so ha accidenal enry is impossible. As safey and securiy are of vial imporance in sewage reamen sysems, he following aspecs are criical: Proecive clohing/gloves/breahing apparaus, should be worn a all imes. Always remove conaminaed clohing and proecive equipmen afer working wih sewage reamen sysems. Wash hands and face prior o eaing, drinking or smoking. Adequae firs aid boxes should be presen. When working wih machinery/elecrical equipmen, proximiy of waer should be noed. All ools and elecrical equipmen should be kep dry. A second person should be presen when carrying ou non-rouine mainenance. he disribuion box should be designed (& consruced by he builder) o faciliae sampling and inspecion wihou placing personnel a risk. Only qualified personnel should carry ou elecrical repairs. Grea care should be aken when handling sludge. Always lock he cover of he sysem. Mainenance of he percolaion area. he percolaion area should be inspeced periodically and any signs of malfuncioning noed. his will show iself by obvious signs of blockage of he disribuion box, or by ponding or smells or polluion in he surrounding area. In his even exper advice should be sough or use should be made of he reserve percolaion area. Servicing should be underaken annually for reamen plans up o 32PE and hen a minimum inerval of 6 monhs for larger plans. Briish Waer hold a lis of qualified service engineers and compaies. www.marshindusries.co.uk 17 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 17 05/09/2012 14:51
Warrany and Servicing Agreemen. Marsh Indusries Limied offers an iniial, full 12-monh warrany on every plan insalled (provided ha i is insalled, commissioned & mainained in accordance wih he manufacurers insrucions and also provided ha he uni has no been subjec o damage or abuse). his warrany covers all of he GRP componens and also all oher addiional insalled componens agains malfuncion. erms and Condiions. he manufacurers insrucions oulined in he handbook mus be followed a all imes. A service conrac does no remove his responsibiliy from he cusomer / homeowner. Under his agreemen, Marsh Indusries Limied will deliver a per-commissioned sysem. he mainenance mus be carried ou in accordance wih he erms laid ou in he Builders and homeowners handbook and his service conrac. I is imporan ha he uni is operaed under he condiions for which i is designed. Any variaion in hese condiions could lead o he uni no performing o is full poenial and he discharge may no mee he required sandards. his will also make any agreemen beween he company and he cusomer null and void. Marsh Indusries Limied shall no be liable for any damage or loss, including consequenial loss, caused by he failure of any plumbing equipmen or failure caused by he inclusion of gross solids, (e.g. disposable diapers or saniary owels ec) in he wase waer reamen uni. he end user of he wasewaer reamen sysem is enirely responsible for he operaion of he uni and for ensuring ha he qualiy of he effluen does no breach he discharge sandards. Soak ways, drains and he empying of primary anks remain he responsibiliy of he clien and damage o he insallaion due o he influx of surface waer or he backing up of soak ways or drains is no covered by his service agreemen o ensure he coninuance of he sysems performance, he user has o ake cerain precauions including he following: he design loading of he plan should no be exceeded. High volume discharges such, as hose from swimming pools and Jacuzzi s mus never ener he sysem. Surface waer mus no ener he sysem. Do no allow large quaniies of chemicals o ener he sysem including: ~ Waer sofener regenerae. ~ Disinfecans. ~ Srong Acids and Alkalis. ~ Oil or Grease. ~ Pesicides. ~ Phoographic Chemicals, ec. N I s i o a 18 www.marshindusries.co.uk w 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 18 05/09/2012 14:51
If he sysem has been sized by ohers, Marsh Indusries Limied will supply a sysem o hese specificaion and no is own specificaions. In his case, he responsibiliy lies wih ohers, in relaion o he maximum flow / lires per day, he sysem capaciy and reenion imes. If Marsh Indusries Limied sizes he sysem, and a greaer load is placed on he sysem, by he addiion of exra houses, bedrooms in he houses, schools, crèche ec or by any oher means, Marsh Indusries Limied is no responsible for he sysem in erms of overloading or he qualiy of he effluen as he reenion imes may be compromised. his is clarified in his as a seleced ex above. If desludging is required i should be done as soon as possible. Sysems ha are no de-sludged will overload and cease o work. In his case, ohers will be required o de-sludge and clean he sysem and componens may require replacing especially if he sysem goes sepic. he cos of hese pars and he labour required, including specialis safey equipmen is excluded from his servicing conrac. If he elecrical connecion ceases o he air blower in he sysem, he sysem will no funcion correcly. I is imperaive ha a coninuous air supply, via he air blower, eners he sysem in order for he sysem o funcion correcly. If his is inerruped for prolonged periods he sysem may go sepic. A sysem ha is negleced in his respec may require new componens, media ec and cleaning if i goes sepic. he cos of hese componens and labour is excluded from all servicing conracs. he discharge o he ground is also a criical par of he operaion of he sysem. Correcly consruced disribuion chambers and disribuion drains / polishing filers are necessary as par of he reamen process. Marsh Indusries Limied will aid in he design of hese, however he consrucion is he responsibiliy of ohers. Incorrecly consruced drains or polishing filers could resul in poor reamen of effluen and Marsh Indusries Limied holds no responsibiliy in his regard. Noe: In accordance wih Marsh Indusries Limied normal policy of produc developmen, his specificaion is subjec o change wihou noice. Marsh Indusries Limied believes ha he informaion conained in his handbook is accurae and is prined for informaional purposes only. No warrans, express or implied, are conained herein, nor does any legal liabiliy aach o Marsh Indusries Limied, for any reason whasoever. Sepember 9h 2005. www.marshindusries.co.uk 19 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 19 05/09/2012 14:51
Warrany & Guaranee he minimum design life of he ank srucure is weny five years. (inernally & exernally) he compressor blower is covered by a wo year guaranee. he diffuser is covered by a five year guaranee. Engineered using high performance maerials. All meal componens sainless seel. Marsh Indusries Limied. Unis 9-13, Addingon Park Indusrial Esae, Lile Addingon, Keering, Norhamponshire NN14 4AS, UK. el: +44 (0) 1933 654582 Mobile: +44 (0) 1933 654583 E-mail: sales@marshindusries.co.uk Web: www.marshindusries.co.uk 20 www.marshindusries.co.uk 37211 Marsh 20pp INSALAION HANDBOOK A5.indd 20 05/09/2012 14:51