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PVC valves on a seachest/manifold?
I am building a manifold to feed the washdown pump, air conditioning
cooling pump and watermaker bost pump. The supply is a 1 1/2" hose coming from a 1 1/2" bronze seacock and Groco 970-1515 strainer. Engine cooling water is supplied through a 1" hose that comes off a 2"x1.5"x1" Groco manifold at the strainer I would use bronze reducing tees except that nobody makes bronze pipe nipple. Only steel, brass or stainless. All three of which are not acceptable. So I have decided to fabricate it from a length of 1" wall PVC tube with 1/2" threaded schedule 80 stubs for the valves. Now comes the question of the valves themselves. I have some Conbraco bronze ball valves that would work but my experience with them in the past has not been all good. While the valve body is bronze the handle is mild steel. On several deliveries of older boats the handles have rusted to the point of being unusable and I have had to resort to Vice Grips to operate the valve. OTOH, I also have some Schedule 80 all PVC ball valves with stainless handle retaining screws. I know that ABYC frowns on using PVC on throughhulls but if the throughhull has a bronze seacock what are the rules for down stream valves? -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com |
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