Top critical review
Check valve prevents winterizing.
Reviewed in the United States on October 28, 2019
I replaced my stock water flanges with these new flanges and everything worked great until it came time to winterize with the pink antifreeze. This flange has a built in spring operated check valve. My RV water pump (it's a big one) could not pull the antifreeze into the system because of this check valve. I had to remove the flange and remove the check valve with needle nose pliers. Then I had to replace the very small hose gasket with a regular gasket. Still did not work as good as the original.