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Go Back   SailNet Community > Boat Builders Row > Newport > Replacing Plastic Valves
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Topic Review (Newest First)
10-24-2007 05:10 AM
KeelHaulin Thru-hulls that are secured to the hull via a flanged nut and backing board (beneath the nut) can have a ball valve added to the threaded end of the thru-hull fitting. You will need to hold the thru-hull so it will not rotate from below, put plenty of PTFE thread compound on the threads of the thru-hull fitting and tighten it down as many turns as you can get before it binds. Use the biggest pipe wrench you can find/fit into the workspace. The thru-hull does not have tapered threads but the taper in the ball valve is enough to get a good seal.

All of the plastic ball valves that Capital Yachts used below the waterline should be replaced. Ideally all of them should be replaced with bronze or marelon; I prefer bronze. The thru-hulls themselves were heavy duty on my boat (a '79 N-41). The old fittings are twice the thickness of new ones and did not require replacement.
10-23-2007 04:09 PM
mandylynn
Replacing Plastic Valves

I have a 1982 Newport 28' when I removed one of the 1" valves I found that the thru hull is straight thread how can a bronze Groco valve be fitted as it has a tapered thread? Is there a better way to this job?

 
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