WaStop 230 Stainless steel

WaStop® Inline Check Valve

Basement flooding
High Water Levels
Odor control
Protection from Animal Infestation
Pump stations
Surface water flooding
Tidal Water

WaStop inline check valves have been an industry leader since their inception in 2000.  Developed on the same principles that are the foundation of Wapro, WaStop’s ingenious function combines common sense and simplicity, to provide our customers with the best possible protection against flooding, odour control and backflow. 

  • Lowest headloss amongst inline check valves
  • Easy installation saving costs on contraction & installation
  • In-built automatic pulsating flow mechanism
WaStop 230 Stainless steel

Keeping common sense and simplicity as keywords throughout development, Wapro is able to provide a solution which can be installed in minutes in a wide range of pipes, with or without flanges, and at any angle. 

Wapro’s focus on simple innovative solutions has led to the development of our unique Memory Membrane.  Designed with the user in mind, this membrane ensures longevity.  We at Wapro understand that maintenance budgets are being cut back.  In tune with our customers’ needs, WaStop’s unique pulsating flow ensures that maintenance is kept to a minimum.  We also know that real life means our valves are put to the test daily with chemicals, temperature changes, debris and unforeseen events.  Our engineers work constantly with real life testing of existing and new materials to ensure our valves withstand real life environments.

We also understand that the ‘throwaway culture’ is being heavily criticized.  The value of ‘life-cycle cost’ over ‘cheapest possible purchase price’ has gained ground with a realization that during storm conditions, the function of the assets in the stormwater or sewer system is by far more important than the initial purchase price of the products in the system. 

In order to protect against flooding, we at Wapro have engineered the WaStop to ensure the lowest possible opening pressure whilst maintaining the best possible seal against backflow.  This, combined with the lowest headloss available, gives the most efficient flow conditions, ensuring the fastest evacuation of water.  An essential quality of check valves used to protect people and property.

Put WaStop to the test in your system to experience the Wapro difference.

We at Wapro know that any solution for flood prevention, or odor control needs to function. Simply, effectively. That’s why, when we invented the WaStop inline check valve in 2000 we had one thought in mind. Instant automatic protection. Working on differential pressure the WaStop functions autonomously, without human interaction, without electricity, without constant maintenance.

It just works.

To invent the best inline check valve on the market our engineers went one step further. We also thought about the different parts of the process and who would be affected by the design of the valve. With function top of mind our engineers developed a valve that works in stormwater, sewer, odor applications, as well as ensuring to cover the range of sizes of existing pipes to enable retro-fitting with ease.

We currently cover all sizes of pipes, all shapes and sizes, from 3-72". As standard. Off the shelf in most cases, for fast delivery. We keep stock to ensure the contractor and end user can keep time and costs to a minimum. We have a standard set of sizes which can be customized, quickly, to suit any application. Flanges on inlet, outlet or somewhere in between are all easily available. Quickly. Long life-cycle is part of our DNA. It’s part of our values. With this in mind we use the right materials for the right application. Stainless steel AISI 304 (EN1.4301) and AISI 316L (EN1.4404), along with a membrane material suited to the application.

The properties of the Memory Membrane:

  • Low opening pressure
  • Extremely low headloss
  • High resistance to external factors (temperature, chemicals, debris, abrasives)
  • Best possible seal against backflow in both high and low pressure events
  • Exceptional mechanical memory ensuring longevity
  • In-built, automatic, pulsating flow action

We at Wapro know that there is a wide range of pipes available on the market, and that these pipes aren’t always perfect.

To ensure the valve we provide you with fits perfectly and protects 100% we’re engineered the guess work out of it. Keeping in line with our customer promise of common sense and simplicity, we have developed a standard range of WaStop from 3-72". On top of this we have a Superior Fit Seal to ensure there is no leakage between the existing pipe and the WaStop Inline Check Valve.

We designed this seal to not only create the perfect fit, but also to ensure quick easy installation. Time is money.

For the residential market we have designed a range of valves for protecting memories. Protecting basements filled with photographs, toys, electronics or books can be easily done with a PVC/PE WaStop Inline Check Valve.   Click here to read more about these valves.  

Dimensions

Article number Nominal size DN [mm] Length [mm] Outer Diameter [mm] Opening pressure Standard [mH2O] Closing pressure Standard [mH2O] Shop Drawing (PDF) Shop Drawing (DWG) Technical Specification
WS97 100 210 97 181 67 PDF PDF pdf
WS97-SH 100 160 97 181 67 PDF PDF pdf
WS101 110 215 100 192 64 PDF PDF pdf
WS101-SH 110 165 100 192 64 PDF PDF pdf
WS116 125 215 115 246 89 PDF PDF pdf
WS116-SH 125 165 115 246 89 PDF PDF pdf
WS146 150 160 144,5 227 78 PDF PDF pdf
WS146-SH 150 120 144,5 227 78 PDF PDF pdf
WS183 200 385 144,5 261 120 PDF PDF pdf
WS183-SH 200 270 181 261 120 PDF PDF pdf
WS193 200 395 191 213 109 PDF PDF pdf
WS193-SH 200 275 191 213 109 PDF PDF pdf
WS215 225 450 215 220 129 PDF PDF pdf
WS215-SH 225 300 215 220 129 PDF PDF pdf
WS230 250 480 230 202 117 PDF PDF pdf
WS230-SH 250 320 230 202 117 PDF PDF pdf
WS240 250 520 240 186 113 PDF PDF pdf
WS240-SH 250 350 240 186 113 PDF PDF pdf
WS283 300 600 283 218 111 PDF PDF pdf
WS283-SH 300 400 283 218 111 PDF PDF pdf
WS290 300 600 290 221 162 PDF PDF pdf
WS290-SH 300 400 290 221 162 PDF PDF pdf
WS340 350 700 340 359 219 PDF PDF pdf
WS340-SH 350 500 340 359 219 PDF PDF pdf
WS370 400 730 370 235 161 PDF PDF pdf
WS370-SH 400 500 370 235 161 PDF PDF pdf
WS390 400 750 390 313 193 PDF PDF pdf
WS390-SH 400 500 390 313 193 PDF PDF pdf
WS440 450 840 443 208 139 PDF PDF pdf
WS440-SH 450 560 443 208 139 PDF PDF pdf
WS490 500 900 490 266 175 PDF PDF pdf
WS490-SH 500 600 490 266 175 PDF PDF pdf
WS590 600 1200 587 367 240 PDF PDF pdf
WS690 700 1300 690 277 181 PDF PDF pdf
WS750 750 1400 750 390 239 PDF PDF pdf
WS790 800 1500 790 347 226 PDF PDF pdf
WS885 900 1700 885 402 268 PDF PDF pdf
WS985 1000 1800 985 395 257 PDF PDF pdf
WS1185 1200 2250 1185 463 289 PDF PDF pdf
WS1385 1400 2600 1385 539 346 PDF PDF pdf
WS1485 1500 2800 1485 621 390 PDF PDF pdf
WS1585 1600 3000 1585 597 383 PDF PDF pdf
WS1785 1800 3100 1785 655 420 PDF PDF pdf
WS250PE 250 480 250 222 133 PDF PDF pdf
WS250PE-I 250 480 236 222 133 PDF PDF pdf
WS315PE 315 600 315 216 160 PDF PDF pdf
WS315PE-I 315 600 295 216 160 PDF PDF pdf

We at Wapro believe in enabling. By being an open organization we learn from, and share with, our customers. Below you’ll find that there is a wealth of information in relation to not only our products, but also other useful and interesting information to help you in your role. If you require any further information please don't hesitate call us. We’re here to help you stop flooding.

Technical Documentation

Technical drawings and specifications can be downloaded for each dimension under the tab for Dimensions and Technical Drawings.  Below you'll find information relating to WaStop such as installation instructions and White Papers.  Please contact us if you require any other information.

Certifications and Approvals

A rigorous testing procedure is undertaken at Wapro to ensure our valves meet our exacting standards.  Our valves tested to appropriate standards in our target markets at third party organizations such as Utah State University Hydraulics Lab and with Kiwa on an annual basis.  

CE-approved models (NPS 3-8") are tested according to SS-EN-13564. Other dimensions are tested according to the same standard. WaStop is patented in the EU, USA and other countries.

WaStop is extremely adaptable in regards to installation options. It can be installed from horizontal to vertical and in both cases can be installed for use in both directions. Joint connections are available for purchase upon request.

Common installations include:

  • Inlets and outlets
  • Installation in an existing pipe
  • Pump stations
  • In manholes and chambers

A rigorous testing procedure is undertaken at Wapro to ensure our valves meet our exacting standards. Our valves tested to appropriate standards in our target markets at third party organizations such as Utah State University Hydraulics Lab, Danish Technological Institute.  Kiwa Sverige AB on an annual basis.

CE-approved models type 0 (NPS 3-8") are tested according to SS-EN 13564-2:2002.
WaStop also meets the requirements according SS-EN 13564-1:2002 and quality assurance according SS-EN 13564-3:2004. Other dimensions are tested according to the same standard and meets the same requirements and quality assurance.

WaStop is patented in the EU, USA and other countries.