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|Description||Inside Diameter||Laying Length||Diameter||A||B||C||D||E||F||N||S|
|Flanged Flap Valve||4||4|
|All dimensions are listed in inches unless otherwise noted.|
Flap valves are used in areas where water accumulates, such as manholes or concrete boxes. When the manhole begins to fill, the flap valve can be opened to flush the area of water. The flap valve door has a tab with a hole located in the center to allow a handle to be attached so it can be opened from the surface.
Furnished standard with neoprene seat mounts. Bronze seat mounting is available on special order. All hinge pins are brass. Flanges are faced and drilled to 125 pound standard.