Teflon tape. Several wraps. Dennis C.
On Mon, Apr 13, 2015 at 9:30 AM, Marek Dziedzic via CnC-List < cnc-list@cnc-list.com> wrote: > That part is solid. The seal is sound. But I had some leak between the > thread of the through-hull and the thread (body) of the valve. This is what > I need to seal. > > Marek > > *From:* Burt Stratton <bstrat...@falconnect.com> > *Sent:* Monday, April 13, 2015 9:50 AM > *To:* 'Marek Dziedzic' <dziedzi...@hotmail.com> ; cnc-list@cnc-list.com > *Subject:* RE: Stus-List sealing through-hull > > > The seal should be between the outer hull and the part of the through-hull > that contacts the outer part of the hull. A good bedding compound like > 4200, sikalex or life caulk works well. I don’t seal the threads on the > inside of the backing nut but that is your choice. My hull is solid glass, > not cored so it doesn’t matter if water can get into the hole from the > inside. > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Marek > Dziedzic via CnC-List > *Sent:* Monday, April 13, 2015 9:01 AM > *To:* cnc-list@cnc-list.com > *Subject:* Stus-List sealing through-hull > > > > Hi, > > > > I have a question that may sound basic: > > > > One of my through-hulls (drain for the head’s sink) started to leak last > spring. I solved the issue temporarily by tightening it – the valve > (seacock) screws onto the threaded through-hull. This spring I want to > solve this problem permanently. > > > > I just went to the boat and disassembled the seacock/through-hull. To my > surprise, I found no seal between the seacock and the through-hull. There > is a beefy backing plate and the PO (I don’t think it is factory) put some > silicone on it. But there is nothing there that is designed specifically to > seal that joint. > > > > Here is a link to a sketch of how this looks like (don’t lough at my > drawing skills): > https://www.dropbox.com/s/tgll2zglwvskdcr/throughhull.jpg?dl=0. > > > > The question is how do you correctly seal the joint between the > through-hull and the seacock. Both are Marelon. The seal is required on the > threads of the through-hull or between the backing plate and the valve body > (the red arrows in the picture show the spots). > > > > An added difficulty is that the valve has a 90 degree elbow and it has to > point up. So it is not necessarily possible to tighten the connection and > to position the valve correctly. > > > > I am thinking of making a seal that would fit between the valve body and > the backing plate. However, the correct installation calls for securing the > valve body to the backing plate with screws, so the seal should be between > the threads. > > > > Any suggestions would be welcomed. > > > > thanks > > > > Marek > > 1994, C270, s/v “Legato” > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the > bottom of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
_______________________________________________ Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go to the bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
