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Go Back   SailNet Community > On Board > Gear & Maintenance > Thruhull/Seacock Removal
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Thread: Thruhull/Seacock Removal Reply to Thread
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Topic Review (Newest First)
04-10-2005 07:50 PM
RichH
Thruhull/Seacock Removal

After 18 years in service the throughhull has probably lost quite a bit of its zinc content. Simply take a face grinder and grind away from the outside until you can push the remaining stub through the hole. Just be careful not to overheat the through-hull by excess grinding so that you dont thermally stress the fiberglass. Otherwise, if you want save and reinstall, use an ''extension'' on your pipe wrench as a ''persuader" - sometimes packing the inside of the bore with dry ice will help.
04-10-2005 04:06 PM
Sasha_V
Thruhull/Seacock Removal

If all else fails, and you do not want to re-use the seacock anyway...

Get a micro tool like a Dremel (go for one of the corded ones, the rechargeables are more useless and frustrationg then anything else. Depending on how much room you have, drill some holes into the collar and body of the seacock to asses how far inside it the thread of the through-hull runs. Cut it off with a hacksaw (if it fits) or the dremel cut-off wheels just above this point.
Now use the cut off wheel(s) to slit the remainded of the collar off the threaded through hull. Delicate, but eminently doable. Get a little bity cold chisel and small hammer and just tap gently to seperate the remains of the seacock fromt the through-hull (Aim the chisel so it will not mash the threads on the through-hull should it make contact). You will find it works quite well if all the chemical release agents and much swearing and bruising of knuckles has failed.

Sasha
04-10-2005 05:50 AM
LH44
Thruhull/Seacock Removal

I am trying to remove thru hulls and seacocks that have been in place for 18 years. I have removed the seacock flange bolts and would like to spin off the seacock, hopefully without spinning the thru hull. a 14" pipe wrench will not budge the seacock. Adequate working space is of course a problem. Any suggestions?

 
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