[CaptainGizmo]

Jim,

Thanks again for contributing info on the newer technology Newell stuff.

If you will take a chamfer tool, and lightly twirl by hand on the metal seat, you can clean up the rough edges on that seat to improve the seal. Lightly, and by hand.

Richard,

Reading your comment, I looked again at those valves with the silicone seals and where they actually seat; I've attaced a photo marked up of where I believe that seat/seal is...way down in the cavity against that small 1/16" port.

If you're saying to smooth the chamfer on that seat, sure looks to be small and must need a very small chamfer tool.  Can you verify my arrow is what you're referring to?

Thanks