Patent ID: 9560805
Date: 2017-02-07
CPC Classifications: A01D,E03F,F16K,Y10T

Claim:
1. A backwater valve assembly, comprising: a main valve body having an inlet, an outlet spaced from the inlet along a fluid flow direction, an inner surface, and an interior space that includes a base portion, a top portion spaced from the base portion along a first direction that is perpendicular to the fluid flow direction, and first and second guide elements spaced and separated from one another along the fluid flow direction, the inner surface of the main valve body further including a protrusion extending from the base portion along the first direction, such that the protrusion and first and second guide elements cooperate to define a recess; a flapper sub-assembly removably securable within the recess, the flapper sub-assembly having a main body portion and at least one flapper element, wherein an interface between the main body portion and the inner surface is sealed, wherein the at least one flapper element is movable between: 1) an open position in which fluid is free to flow along the fluid flow direction from the inlet through the interior space and out of the outlet of the main valve body, and 2) a closed position in which the flapper element seals against the main body portion and prevents fluid from flowing in a direction that is opposite the fluid flow direction; and wherein the flapper sub-assembly may be installed in or removed from the main valve body so that the flapper sub-assembly, including both the flapper element and the main body portion, can be replaced.