Description

The SuperPro O-440-9 is a replacement cover o-ring for diverter valves. It is listed as the cover seal for American 2 and 3 directional port valves, and also for Compool and Pac Fab port valve covers, the Polaris back up valve, Jandy valve covers and backwash valve covers and lids, and Waterway serviceable check valve and TruSeal covers.

Cover seal, not diverter seal

This is the o-ring that sits between the valve body and the cover you unscrew to get at the diverter. It is a different part from the seals on the diverter itself, so if the valve is passing water between ports rather than leaking to the outside, this is not the part you need.

The symptom it fixes

Water weeping out from under the valve cover. Once an o-ring hardens or takes a permanent set in its groove, no amount of tightening will stop the leak. Clean the groove and the mating face, fit the new o-ring with a thin film of silicone based lubricant, and tighten the cover down evenly.