Flow-through trap primer valve assembly

Abstract

A flow meter trap primer valve assembly for regulating flow includes an inlet for receiving water from a supply, a check valve mounted within an adaptor having an elongate bore forming a jet, and the check valve includes a piston mounted within a cartridge. A biasing element normally urges the piston against a trap seat.

1 . A flow meter trap primer valve assembly for regulating water flow comprising:
 an inlet for receiving water from a supply;   a check valve mounted within an adaptor having an elongate bore forming a jet;   the check valve including a piston mounted within a cartridge; and   a biasing element for normally urging the piston against a trap seat.   
     
     
         2 . The trap prime valve assembly of  claim 1  wherein the cartridge includes an annular rim having an interior annular surface wherein a plurality of spaced-apart upright elements project from the annular rim. 
     
     
         3 . The trap primer valve assembly of clam  2  wherein the piston is dimensioned for sliding along the annular interior surface of the annular rim when water from the supply is introduced into the inlet. 
     
     
         4 . The trap primer valve assembly of  claim 3  wherein the piston may slide upwardly along the interior annular surface of the annular rim to permit water from the supply to be directed to the jet. 
     
     
         5 . The trap primer valve assembly of  claim 4  wherein the piston and the jet are aligned along a common axis.