The grey water valve was getting difficult to open & close, so I found an interesting 10-minute fix for this.
I drilled a small hole in the valve body, just off-center.
I got a can of white lithium grease with a small nozzle injector and filled the cavity with a fair amount of grease.
Then I worked the valve back & forth a bit until it was sliding well, and inserted an appropriately-sized screw. Works great.
4-Oct-2020