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 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 Thru hull replacement
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TwistyMcFisty
Deckhand

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10 Posts

Initially Posted - 10/04/2022 :  04:19:48  Show Profile  Reply with Quote
Can anyone point me in the direction of a how-to on replacing the early “volcano” thru hull with a proper one??
I just bought the boat and want to do this while it it on dry land!!
Thankyou!!!

1977 Catalina 25
Standard rig, swing keel

Outer Banks, North Carolina

Steve Milby
Past Commodore

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USA
5758 Posts

Response Posted - 10/04/2022 :  05:58:53  Show Profile  Reply with Quote
In essence, you remove the old to hull valve and pipe, grind the volcano flat and install a new bronze pipe and ball valve.

Here's a link. Scroll down to "To" hull pipe vs. Thru-Hull Fitting. http://barnaclebillholcomb.blogspot.com/2017/

Steve Milby J/24 "Captiva Wind"
previously C&C 35, Cal 25, C25 TR/FK, C22
Past Commodore
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Voyager
Master Marine Consultant

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USA
5105 Posts

Response Posted - 10/07/2022 :  21:55:43  Show Profile  Reply with Quote
Catalina Direct also offers several plastic parts that can work for decades.
The actual through-hull mushroom piece
https://www.catalinadirect.com/shop-by-boat/other-catalinas/interior/plumbing/valves-thru-hulls/thru-hull-mushroom-for-12quot-or-34quot-seacock/
And the seacock ball valve
https://www.catalinadirect.com/shop-by-boat/capri-25/interior/plumbing/valves-thru-hulls/12quot-ball-valve/

Note about hose clamps:
1. Always use stainless steel clamps. Test them out using a small magnet or your navigational compass. It they’re at all magnetic, then they are NOT SS.
2. Always use two in tandem, because when one fails, you’ll have a backup clamp.

Bruce Ross
Passage ~ SR-FK ~ C25 #5032

Port Captain — Milford, CT

Edited by - Voyager on 10/08/2022 05:34:34
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