WaStop scan for more information Check Valve …

1 Technical guide go to organisation for civil and rural water product solutions2016 | DRAINAGE | WAsTopWastop is a unique patented Check Valve that stops backflow in drains, providing reliable protection against pipe infiltration by insects, small animals, flotsam and gases especially when water levels are stormwater dischargeWaste and surface water odour control Basement floodingpump stations WetlandsEmergency overflow Product Attributesprovides flood and odour protectionprevents return flowQuick installation into new and existing drains or chambersLow maintenance and low operation costsThe self-cleansing Valve helps to prevent blockagesVery low head lossApprovals/StandardsUs patent No. 6,810,914 pCT/sE00/02524 Dimension tested and approved according to ss-EN -13564 -1:200280-200 mm models are CE approvedQualityIso 9001:2008 Quality Management standardWaStop Check Valve SystemScan for more informationWastop is a unique patented Check Valve that stops backflow in gives reliable protection against infiltration of the pipeline by insects, small animals, flotsam and gases, especially when water levels are high.

2 It can be installed in minutes into new and existing drains or manholes. The elastomer membrane design means there is only one moving part. The Valve is self-cleansing ensuring it will not block, which results in low maintenance and therefore low operation costs. The WaStop Check Valve also boasts one of the lowest head losses on the market which reduces the risk of damming. WaStop Check Valve is available in dimensions from 75 1800 mm, however, larger or customised dimensions can be manufactured on request. Design Specifications Manufactured using stainless steel EN 316. pVC, HDpE and ss 304 versions are also available. A range of dimensions available, from 75 to 1800 mm (depending on the body, material). Larger or customised dimensions can be manufactured for individual requirements.

3 The flexible membrane design means there is only one moving part. The membrane flexibility can be varied, according to the required function. ( To stop odours, a softer elastomer for easier opening and closing is used). Can be designed to withstand up to 8 m back pressure. The unit can be installed either horizontally or vertically and either at an inlet or outlet. standard anchors and a seal are included for installation in drains. Flanging is standard on ss units from DN1000 and above. Custom flanging available on request. Joint connections are available for purchase upon Approved CE-approved models from 80 200 mm are tested and approved for up to five meters back The WaStop Check Valve consists of just two parts a elastomer membrane and a pipe .

4 The function is simple pressure from flow in the normal flow direction causes the Valve to open just enough to allow the flow through. If there is no flow through the pipe , the Valve closes. The Valve also closes if there is negative pressure or maintenance, rinsing and checking for the Valve is recommended. Care should be taken if high pressure flushing is used. WaStop should be installed in a position that enables inspection, for example, in close proximity to a Head LossWastop Check Valve has the lowest head loss in the market, reducing the damming in the drainage system. Flow tests are conducted by Vattenfall Utveckling AB. please contact your local Hynds representative for head loss 1 Valve opens with normal flow and closes with WaStop | DRAiNAgE | Pg 2 ApplicationStorm Water and Waste Water outfallsprotect waste and surface water drains from the high water levels of rivers, lakes and the sea, by installing a WaStop Check Valve in an Control The discharge of aggressive gases from older sewage systems can be a major problem in built up areas allowing odours to pass through drains on street level.

5 By installing WaStop , discharge can be stopped or redirected to a less sensitive area. softer versions of the membrane are available specifically for this FloodingInstalling a WaStop Check Valve in a buildings drainage system or basement can protect the property from flooding. Installation time and costs can be kept to a minimum by installing the unit in an existing drainage StationsBack flow in pump stations caused by overflow outlets is avoided when a WaStop Check Valve is installed. WetlandsA WaStop will avert the flooding of wetlands or other flood sensitive farmland, by preventing salt water and other unwanted water from forcing back in through an overflowFlooding can occur between waste and storm water drains due to water forcing its way back into the drainage system.

6 Installing a WaStop in the emergency overflow will prevent 2 Wingwall installation at Mana, poriruaFig. 3 Karehana Bay installationFig. 4 Installation in pE pipe Christchurch WaStop | DRAiNAgE | Pg 3 Flexible couplingstandardsingle flangeDouble flangeWaStop Standard Product RangeWastop are manufactured in EN 316 stainless steel, pVC or pE. EN 304 stainless steel is available as an 1 Stainless SteelCodeDN (mm)A (mm)L (mm)Fits pipe ID (min-max)VCWR0100SS1009722098-101 VCWR0105SS110101220102-105 VCWR0125SS125118250119-121 VCWR0150SS150146300147-151 VCWR0190SS200183400182-193 VCWR0200SS200193410192-203 VCWR0225SS225215450216-225 VCWR0235SS250230480232-250 VCWR0250SS250240520242-250 VCWR0300SS300290600292-300 VCWR0350SS350340700340-352 VCWR0375SS375370730370-382 VCWR0400SS400390750392-406 VCWR0450SS450440900444-460 VCWR0500SS500490900492-504 VCWR0600SS6005901200588-604 VCWR0700SS7006901300692-708 VCWR0800SS8007901500792-810 VCWR0900SS9008851700887-915 Note: Please refer to Fig.

7 6tABLE 2 PVCCodeDN (mm)OD (mm)L (mm)VCWR0075 PVC7575125 VCWR0100 PVC110110210 VCWR0125 PVC125125240 VCWR0150 PVC160160300 VCWR0200 PVC200200400 Note: Please refer to Fig. 8tABLE 3 PE inline typeCodeDN (mm)OD (mm)L (mm)VCWR0250PE250200480 VCWR0315PE315315600 Note: Please refer to Fig. 8tABLE 4 Stainless Steel FlangedCodeDN (mm)L (mm)OD1 (mm)OD2 (mm)OD-f (mm)Bolt circle diam (mm)AttachmentVCWR1000 SSFL100018009559851230116028 x 36 mmVCWR1200 SSFL12002250115511851330127028 x 39 mmVCWR1400 SSFL14002600134913851455138028 x 39 mmVCWR1500 SSFL15002800144114851675159028 x 42 mmVCWR1600 SSFL16003000154115851915182028 x 48 mmVCWR1800 SSFL18003300174117852115202028 x 48 mmNote: Please refer to Fig. 7tABLE 5 PE insert type (*)CodeDN (mm)OD1 (mm)OD2 (mm)L (mm) : Please refer to Fig.

8 9 (*) Also available in sizes up to 1800 mm on request Fig. 5 WaStop configuration WaStop | DRAiNAgE | Pg 4 AttachmentBoltCircDiamBody OD (A)A graduated sealensures the WaStopfits tightlyRLA-AFig. 6 ss version side section and seal detailFig. 7 ss Flanged version side sectionFig. 8 pE/ pVC inline type side sectionFig. 9 pE insert type side WaStop | DRAiNAgE | Pg 5 Joint couplingExisting pipeFlow directionJoint couplingExisting pipeFlow directionOutlet or end of pipe installationJoint couplingExisting pipeFlow directionJoint couplingExisting pipeFlow directionExisiting pipe - inline installationExpansion boltExisting pipeFlow directionRubber sealExpansion boltExisting pipeFlow directionRubber sealIn manhole option 1 Joint couplingExisting pipeFlow directionIn manhole option 2 Joint couplingExisting pipeFlow directioninstallation optionsWastop can be installed at any angle, from vertical to horizontal, at both the inlet and the outlet.

9 The greater the angle, the more efficient the self-rinsing effect. A minimum incline of is recommended when installing WaStop in a sewage drain, or 1% for installations in stormwater 10 outlet or end of pipe installationFig. 11 Existing pipe Inline installationFig. 12 Manhole option 1 Fig. 13 Manhole option WaStop | DRAiNAgE | Pg 6 Case Studies Porirua, New Zealand WaStop DN1300mmLocation: semple st : p orirua District CouncilProblem: Due to limited fall in stormwater lines running into the harbour, high tide / heavy rain occurrences would fill the outfall pipes. This led to surface flooding in low lying areas around the city : The 1300 mm flanged WaStop Valve installed in a stormwater outfall pipe prevents tidal encroachment into the stormwater system.

10 This allows the full capacity of the pipe system to be used for stormwater retention during high : 1300 mm stainless steel WaStop Valve with rear nest flange to locate Valve in pipe and full face flange to secure Valve to pipe end. Fig. 14 WaStop DN1300 mm poriruaFig. 15 WaStop DN600 mm New Brighton ChristchurchNew Brighton Christchurch, New Zealand WaStop DN600mmLocation: Admirals Way, south shore, New Brighton ChristchurchClient: Christchurch City CouncilConsultant: GHDP roblem: Due to earthquake damage a stormwater outfall had sunk below river level causing : o riginally a pVC flap gate was installed however this was unsuccessful due to debris and seaweedcausing the flap Valve to jam open. Upon discussion with consultants the pVC flap gate was replaced witha WaStop .