(1) Took the handle, gaskets and diaphragm off. The area under the button had what looked like a lot of sand or powder in it. And the inside of the this same area looked kinda nasty — not exactly corroded, but messed up. What causes this? Is this just dirt and grime from someone’s thumb over the last 60 years?
(2) My parts manual shows a metal disc on either side of the diaphragm, but the kit I bought only comes with a disc for the underside. Also, when I took the tank apart there was only the one disc on the underside. Am i reading the parts diagram wrong or am I missing a part?
Thanks.