With time, the spring or flapper seal in a pool Spring Flapper Check Valve will deteriorate to the point where the Check Valve will begin to leak and water will start to flow backwards through the pipes when the pump is off. Fortunately, with most Spring Flapper Check Valve designs. you can replace the flapper mechanism without having to replace the whole Check Valve. This guide shows you how to remove and replace the Flapper Mechanism in a Pool 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.
IDENTIFY MFG OF CHECK VALVE - At this point you will have to determine what parts are available to repair your Flapper mechanism. For example, Jandy only sells the Flapper assembly integrated with the Cover, where CMP will sell just the Flapper Assembly without having to buy a Cover with it. Check your manufacturer to see what parts are available for your Check Valve. If you have to buy the Flapper Assembly attached to the Cover, skip to Step 14.