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Old 05-15-2014, 09:08 AM   #4
DavidM
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City: Litchfield, Ct
Join Date: Aug 2012
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Marine bronze ball valves have straight threads to match up with the thruhull and tapered threads on the outside to screw in a bronze hose barb fitting. Normal hardware stores don't sell these- mostly brass which is no good in seawater.

Apollo makes them and you can buy them from West Marine, Defender, etc.

"Real" seacocks where the valve body is integral with the thruhull are better, but if you are just looking to replace an existing installation, buy a marine bronze ball valve.

I have seen chrome plated bronze balls and stainless steel balls and stainless steel with Teflon seats seem to hold up best.

This is a link to a good tutorial on seacocks and ball valve replacement: Replacing Thru-Hulls and Seacocks Photo Gallery by Compass Marine How To at pbase.com

David
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