Croosh wrote:

Does anyone have tried that, or does anybody know waht grease is safe
for the tank?

There's a white grease that's used to lubricate plumbing fixtures. It's sold in
plastic tins about 2" in diameter and 1/2" thick. It's safe enough to use on
things people drink from. Lowes sells it, if there's one in your area. The stuff
I use is "Plumber's Silicone Grease." It's made by Radiator Specialty Co.,
Charlotte, NC.

George Patterson
Coffee is only a way of stealing time that should by rights belong to
your slightly older self.