Join Date: Aug 2009
Location: Buffalo, NY
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I recently purchased my first keelboat, a Pearson 30, hull 225, and I've been having fun tracing out systems, exercising sea-cocks, replacing hoses, etc. I replaced the head suction hose with 3/4" heater hose from the auto shop. I found four seacocks, none of which have been moved in many years, I'm afraid. One raw water to head, one is raw water to sink, one is engine cooling water, and the fourth was the old head overboard which has been closed and sealed off in the hose.
I tried to exercise the three working ones, and was partially successful. The engine cooling water is a 1/4 turn ball valve and works fine. The head suction moved after some persuasion, but the sink water seacock handle broke off in the channel lock jaws. I then backed out the tapered plug and went to the local shop to get a replacement. The shop told me that a replacement plug was probably not available, and that I should just remove the entire seacock and replace it with a 1/4 turn ball valve. They said to be careful that the through hull does not turn - have an assistant hold it on the outside of the hull (two nubs on the ID - jam in a flat handle and hold it with an adjustable wrench?). They said the threads may be straight, not tapered, and the new valve would be tapered threads.
What do you guys recommend? Should I replace the through hull as well? Can I find a replacement tapered plug and save myself some hassle?