Plugging Through Holes

rgranger

rgranger

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Jan 19, 2010
12,933
Hobie 16 & Rhodes 22 Skeeter Charleston
Joe said:
Drain plugs are normally conveniently located and can be readily seen in the normal operation of the vessel, whether it be a sailing dinghy or a ski boat. Thru hulls are often located in less accessible and visible locations....
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... and the typical bung for a drain hole is an inch or more and brass lined.... the typical hull is a quarter inch to a half at most.... anyone filling a through hull with a drain plug is asking to get on the Darwin Awards...
 
R

Rainh2o

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Jun 16, 2014
18
Catalina 25 Muskegon Michigan
rgranger said:
... and the typical bung for a drain hole is an inch or more and brass lined.... the typical hull is a quarter inch to a half at most.... anyone filling a through hull with a drain plug is asking to get on the Darwin Awards...
Click to expand
My hull was at least an inch and a half think... Maybe closer to an inch and three quarters
 
jibes138

jibes138

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Jan 27, 2008
3,092
ODay 35 Beaufort, NC
rgranger said:
... and the typical bung for a drain hole is an inch or more and brass lined.... the typical hull is a quarter inch to a half at most.... anyone filling a through hull with a drain plug is asking to get on the Darwin Awards...
Click to expand
...and the length of the through hull you are trying to seal is most likely a few inches long or more and rigidly mounted with a backing plate and nut.

Some of these plugs come with a flange to prevent it from pushing through the hole. Would you rather have one of these filling a hole in your boat when a ball valve snaps off or a wooden plug jammed in the hole?

Again, to the OP if the boat is on the hard, then yank out the fitting and glass up the hole, but if you need an emergency TEMPORARY fix this might be something to consider. The water pressure, which is very low by the way, water pressure at 33 feet is 14.7 psi so at a foot or so it is only about a half a psi and is pushing the plug into the boat. Another issue though is paint buildup inside the through hull making sealing to it difficult at best.


http://newcontent.westmarine.com/content/images/catalog/full/1919414.jpg
 
C

Capt jgw

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Feb 8, 2014
1,300
Columbia 36 Muskegon
As a part time TowBoat US captain I can tell you that a lot of our rescues are due to missing drain plugs. The power boaters can keep them.
 
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