Drain Valve Lube
I used Silicone spray on the valves in the old trailer to keep the seals from sticking. They were readily accessible. The new trailer has them stuck way up in the covered "basement". IIRC somebody ...
Forum Discussion
I had a leaky grey water valve and bought a bottle of the Thetford valve lubricant and after a couple months in storage we took it out and no more leak!
