Patent ID: 6923198

Claim:
A plastic diaphragm valve comprising: a plastic upper valve body, a resilient diaphragm and an actuator in the upper valve body; a substantially plastic lower valve body configured to mate with the upper valve body, the lower valve body having an interior defining a fluid passage, the lower valve body comprising an integral weir, a first flow duct, a second flow duct and a third flow duct, the weir configured to sealingly interact with the diaphragm, the weir, the first flow duct, the second flow duct and the third flow duct each having an axis; the weir axis being sloped from a horizontal plane X degrees where 0<X<90, downwardly toward the first flow duct or the second flow duct; a portion of the fluid passage having an interior surface that is contiguous with and adjacent to the third flow duct; the portion being sloped downward toward the third flow duct; the third duct axis being oriented downwardly away from the weir and substantially parallel to a vertical axis such that substantially all liquid from within the fluid passage drains from the valve by gravity, and a weir support member extending longitudinally through the weir for reinforcing the weir.