- Cast bronze frame and cover
- 125# Flange
Hydrostatic pressure relief valves shall be designed to effectively relieve excess ground water from around submerged structures, helping to prevent flotation of the structure.
The valve frame shall be of solid cast bronze with a machined seating surface. The frame shall be of the flanged type with holes for mounting to an ANSI 125# standard flange or on the flat surface of a wall (optionally, the valve shall mount to a cost iron wall sleeve which incorporates a cast iron strainer and integral water stop). The valve cover (flap) shall also be of solid cast bronze incorporating a neoprene rubber seating surface mounted in a dovetail type groove. Hinge arms shall be cast integrally with the cover and be attached to the frame utilizing a stainless steel spring pin. Wall type hydrostatic pressure relief valves shall be Waterman Industries, Inc. Model PRB-14 or approved equal.