Dump Valves

On our second last trip I had a small amount of liquid escape through one of the valves. Learned to hold the slinky under the exit when taking the cap off to catch that cup full. After dumping I put water in only the grey tank and it leaked, so I bought a new smaller valve. When I started the install I realized there was no provision for making room to pull the valve out or push the new one in - there is a part of the valve that projects into the pipe. I bought a rubber joiner that should make it possible. Then procrastinated, thinking I should do both valves and at a time when trouble wouldn't interfere with a trip. I did lubricate the valves with silicone spray, squirting in from the drain opening and pouring a little Canola oil down the toilet and sink.

Lazy man's luck - there was no leak at all on the next trip.