WaStop® Inline Check Valve

Flood protection
Pests & odors

WaStop inline check valves backflow preventer 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
Wapro-Wastop-backflow-flood-protection-regulation-ws-230-cutthrough-black
Product information

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 backflow preventer 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.

WaStop is available to fit most types of pipes from DN75 to DN1800 and is also available in an Access chamber for easy access from ground level.

WaStop inline check valve excels in many areas. WaStop exhibits the lowest headloss on the market, 100% backflow prevention and a unique pulsating flow that keeps pipes both upstream and downstream cleaner which reduces maintenance costs substantially.

Click below to read more about Headloss, Backflow, Pulsating Flow and Installation.

WaStop inline check valve excels in many areas such as having the lowest headloss on the market, 100% backflow prevention and a unique pulsating flow that keeps pipes both upstream and downstream cleaner which reduces maintenance costs substantially.

Please click on the links below to understand how each of the features of WaStop can be an advantage for your stormwater or sewer network.

Technical Information

We at Wapro know that there is a wide range of pipes available on the market, and that these pipes aren’t always perfect. 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. Please refer to the WaStop Residential pages for more information.

WaStop is also available in an Access Chamber. The Access chamber has a pre-installed WaStop valve. The WaStop module is removable from ground level for easy maintenance. Available in DN110, DN125 and DN160mm. Please refer to drawings for more information.

The following technical information relating to WaStop inline check valves can be found on the tabs below.

  • Drawings
  • Technical Specifications
  • Installation Instructions
  • Certifications
Wapro-Wastop-backflow-flood-protection-dimensions
Dimensions & Drawings
Installation
Documents

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 75mm - 1800mm. 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.

Dimensions

Article number Rsk NPS [inch] OD [inch] Drawing file name (imperial) Drawing file name (metric) Technical specification
WS97-S 4560992 4 3,82 PDF DWG PDF DWG PDF
WS101-S 4560993 4 3,94 PDF DWG PDF DWG PDF
WS116-S 4560994 5 4,53 PDF DWG PDF DWG PDF
WS146-S 4560995 6 5,69 PDF DWG PDF DWG PDF
WS183-S 4560996 8 5,69 PDF DWG PDF DWG PDF
WS193-S 4560997 8 7,52 PDF DWG PDF DWG PDF
WS215-S 4281311 9 8,46 PDF DWG PDF DWG PDF
WS230-S 4281312 10 9,06 PDF DWG PDF DWG PDF
WS240-S 4281315 10 9,45 PDF DWG PDF DWG PDF
WS250PE-I-S 10 9,29 PDF DWG PDF DWG PDF
WS250PE-S 10 9,84 PDF DWG PDF DWG PDF
WS265-S 11 10,43 PDF DWG PDF DWG PDF
WS283-S 4281316 12 11,14 PDF DWG PDF DWG PDF
WS290-S 4281313 12 11,42 PDF DWG PDF DWG PDF
WS315PE-I-S 12 11,61 PDF DWG PDF DWG PDF
WS315PE-S 12 12,4 PDF DWG PDF DWG PDF
WS340-S 4281317 14 13,39 PDF DWG PDF DWG PDF
WS370-S 4281318 15 14,57 PDF DWG PDF DWG PDF
WS390-S 4281319 16 15,35 PDF DWG PDF DWG PDF
WS440-S 18 17,44 PDF DWG PDF DWG PDF
WS490-S 20 19,29 PDF DWG PDF DWG PDF
WS590-S 24 23,11 PDF DWG PDF DWG PDF
WS690-S 28 27,17 PDF DWG PDF DWG PDF
WS750-S 30 29,53 PDF DWG PDF DWG PDF
WS790-S 32 31,1 PDF DWG PDF DWG PDF
WS885-S 36 34,84 PDF DWG PDF DWG PDF
WS985-S 40 38,78 PDF DWG PDF DWG PDF
WS1040-S 42 40,94 PDF DWG PDF DWG PDF
WS1185-S 48 46,65 PDF DWG PDF DWG PDF
WS1385-S 56 54,53 PDF DWG PDF DWG PDF
WS1485-S 60 58,46 PDF DWG PDF DWG PDF
WS1585-S 64 62,4 PDF DWG PDF DWG PDF
WS1785-S 72 70,28 PDF DWG PDF DWG PDF

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

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. Please contact us if you require any additional information.

Approvals and Certifications

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 (DN80-200mm) 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.

Tests

Read more about our tests of this product.

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