Flap Valves HDPE - Flood Protection

Flap Valves prevent water backup through storm pipes and discharge pipes. They offer flood protection in storm conditions.

They operated automatically to discharge water behind the flap door and close when water rises on the discharge side.

Rising waters from flood conditions, high tides and storm serge are prevented from entering a drainage system.

In case of rising water levels flooding is prevented by self - actuated closing of the flap. HDPE Flap Valves weigh less than metal units and are virtually maintenance free.

Al metallic materials for the HDPE flap valves are 316L stainless steel e.g. for hooks and hinges. 316L stainless steel provide corrosion protection for long life operations.

Download cut sheet Introduction To HDPE Flap Valves


- HDPE Flap valves, protection infrastructure from storm damage. They prevent back flow into discharge pipes, protect low level lands and building structures.

- Standard HDPE flap valves may be covered by one meter water column on a continuous bases and in the event of flood conditions five meter of water head up to 72 hours. Higher pressures are available.

- Flap valves manufactured with HDPE materials have very low cracking heads, doors open for one way flow with just a few millimeters of deferential pressure.

Flap Valve Mounting types available:

Flap Valves Wall mounted: WA-PTKG flap valves bolt mounted to a flat wall to prevent reverse flow.

Flap Valves Flange mounted: WA-PTKF flap valves attachment to a flanged at the end of a pipe.

Flap Valves: WA-PTKA, the flap valve door is mounted on a 10 degree angle.

Flap Valves Underwater mount: WA-PTKA flap valve always water covered, 10 degree angle.

Flap Valves Pressure Lines: WA-PWKF flap valves for pump applications with vents.

In-line Penstocks Inside pipe mounting.

Typical applications:

- Prevents back flow from high tidal waters.

- Prevents flooding from storm events.

- Discharges waters to tidal inlets, ditches, manholes, culverts, reservoirs, ponds, and basins.

- Flap Valves are check valves that allow outflow of water while preventing back flow.

- Flap Valves can be used on 4" diameter pipe (100 mm) and up.

- HDPE flap valves require very low opening pressure.

- When water on the face side of the flap door rises above water on the back side, the watertight door closes to prevent back flow.

- Flap Valves may be installed above the waterline or below the waterline.

- HDPE (High Density Polyethylene) Flap Valves, are lightweight, corrosion resistant non-return check valves for the prevention of flood damage.

General Installation Instructions Wall Mount HDPE Flap Valves



Available for all American and International pipe sizes
All pipe materials: PVC - Ductile Iron - Concrete - HDPE

Westatlantic Tech Corp, Contact or 902 455 4455



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Flap Valves, hdpe, floods, flood control, rising ocean levels, river overflows, river levels, storm events, Penstocks, Sluice Gates, stop logs, Weirs, Float Valves, Flood Gates, stainless steel, 316L: USA and Canada; USA: Louisiana, LA, Alabama, AL, Mississippi, MS, Texas, TX, Ohio, Illinois, PA, South Carolina, SC, North Carolina NC, Wisconsin, WI, Milwaukee. Canada: Alberta, AB; Edmonton, Calgary, British Colombia, BC; Vancouver, Saskatchewan, SK; Regina, Saskatoon, Manitoba MB; Winnipeg, Ontario, ON; Oakville, Toronto, Mississauga. Quebec: QC; Montreal, New Brunswick, NB, Nova Scotia, Newfoundland Labrador, NL.