SELF-CONTAINED, AUTOMATIC PRIMER VALVE FOR SEWER LINE DRAIN TRAPS

摘要

ABSTRACT OF THE DISCLOSUREA primer valve for sewer line drain traps comprises a casehaving an upper water inlet communicating with the pressurizedhouse line and a lower water outlet communicating with the trap.The hollow interior of the case is divided into a lower valveddispensing chamber which dispenses water into the trap; an inter-mediate supply chamber which supplies water to the primer valvesystem, and an upper trapped-air chamber. The latter actuates thevalve in the dispensing chamber and dispenses water to the trapeach time the pressure in the house line drops.