Originally Posted by Dave Lochner
White vinegar does little to nothing to calcium. .
Distilled vinegar WILL dissolve sea water
buildup, but it's more trouble than it's worth because it has to be changed every few hours (something that most people--you included apparently--don't realize, and it takes forever. So muriatic acid, or better yet a product called Sew Clean
Sew Clean ® | TRAC Ecological
, is the easiest and beats the socks off removing hoses to bang 'em on the dock
and then putting 'em back.
However, like most things, prevention is a lot easier than cure, and a cupful of distilled white vinegar flushed through the plumbing
regularly--weekly if you're a liveaboard--will PREVENT mineral buildup. Flush it undiluted all the way through the system...follow with a bowlful of clean FRESH water
in about 45 minutes. That's all you need to do.
As for his joker valve, we don't know what he expects of it. A new joker valves will only block slow seepage until enough flushes have gone through it to to stretch the slit slightly...the slit will widen with continued toilet use until finally it ceases to be a slit and becomes a hole. So if his toilet discharge line goes directly up and over a vented loop, it wouldn't take long for water or waste left in the line to start seeping back down into the bowl. The cure: flush long enough in the dry mode to move the water over the top of the loop--which any toilet that's working anywhere NEAR factory specs CAN do.
However, if his joker valve is allowing a flood into the bowl once the joker valve is even slightly worn, something downstream is pushing back....mineral buildup, a blocked tank vent, partial clog.... So I don't think we know enough yet to offer a definitive diagnosis.