Drain screws on seacocks - SailNet Community
 
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post #1 of 6 Old 12-04-2007 Thread Starter
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Question Drain screws on seacocks

Dutifully trying to follow advice to "winterize" seacocks (in the owner's manual for the Raritan toilet in my boat), I conjectured that what that would involve is removing the drain screws in the barrels to let out trapped water. I did that to the more accessible seacock drain screws last weekend. AFAIK, no water drained out, and I lost a screw that rolled into an inaccessible crevice. I asked the yacht yard's straw boss today whether his guys mess with the drain screws when they winterize boats for customers. He said "no." Instead, they just open the seacocks briefly after filling the water lines with antifreeze and then close 'em again, to let the antifreeze seep down into the seacock. Sounds good ta me.

What do y'all think? Is there any reason to mess with those little drain screws?
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post #2 of 6 Old 12-04-2007
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Maybe you get get a magnet and recover the screw you lost. I don't believe you need to remove the screw, just loosen it.

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post #3 of 6 Old 12-04-2007
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If the screw is austentic stainless steel, or marine-grade stainless steel...it is non-magnetic, and the magnet won't do jack. If it is bronze... I believe that is also the case. The cheap, non-marine-grade (martenistic) stainless steel is magnetic.

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post #4 of 6 Old 12-04-2007
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I always thought those screws were more for lubing the seacock, not draining it; it's a pretty tight squeeze between the ball and casing, don't know that enough moisture could get in there to shatter it. but while you got it open, good time to lube it.

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Quote:
Originally Posted by HoffaLives View Post
I always thought those screws were more for lubing the seacock, not draining it; it's a pretty tight squeeze between the ball and casing, don't know that enough moisture could get in there to shatter it. but while you got it open, good time to lube it.
Mine are the bronze revolving-cylinder type.
What kind of lube do you put in there?
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post #6 of 6 Old 12-05-2007
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Quote:
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Mine are the bronze revolving-cylinder type.
What kind of lube do you put in there?
some guys swear by morey's from napa, but i would use any old high quality grease. once you take off the screw you install a grease nipple. doesn't take much grease, and it displaces any water that might be in there.

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