A check valve relies on a tight seal to close off the valve and prevent water backflow when the pump is shut off. If debris get caught in the flapper seal, it has to be cleared out to prevent backflow leakage. This guide shows you how to clear the debris around the flapper of a Spring Flapper Check Valve.
TYPES OF SPRING FLAPPER CHECK VALVES - This picture shows the two popular styles of Spring Flapper Check Valve. Both provide access to the flapper mechanism from the top of the valve. One is screwed down with 8 screws. The other is secured with a more convenient twist on Cover Nut. Although this guide is written with references to the Cover Nut version, it is also applicable for the 8-screw version.