Thanks so much for all the info Rick. I have some Groco flushmount thru hulls that will fit the hole but have a flange diameter that is smaller than the originals (whatever brand they might be). I also have the Groco ball valves that fit on the thru hulls and will work fine for the drains. The current plan is to install the new smaller diameter flanges and fill in the 1/4 inch gap with epoxy or maybe even 5200. Then paint over it and forget it!
Thanks Joel for the buckalgonquin link - they have flushmount thru hulls as well but they are essentially the same size as the Grocos. **************************************************************** "Re: Contents of CnC-List digest..." Forespar make Marlon ball valves with NPS threads in sizes from ?? to 1 ??. (They also make ball valves with NPT, but NPT valves are for plumbing and not thru hulls.) They also supply a range of tailpieces to connect the valve to a hose. Here is a link to the listing on West Marine: http://www.westmarine.com/buy/forespar--marelon-ball-valves-tailpieces--P011 _332_003_009 In addition, there is a regional marine supply wholesaler called the Paxton Company in my area (in Norfolk and Wilmington, NC), and if I recall correctly the bronze valves I used came from there. So bronze ball valves with NPS are available, if a bit hard to come by. I suspect that most of the time a flanged seacock gets used instead of installing a nut on the seacock to secure it to the hull and a separate ball valve above the nut. The bronze seacocks aren?t a lot more expensive than a bronze valve. And BTW, on the WM site they have a flange (Groco I think) with NPS on the bottom and a pipe thread coming off the top. When I redid the plumbing on my 38 a few years ago, I used Marlon valves for the larger thru hulls ? 1? and larger if I recall. The Marlon valves are designed for some ridiculous number of cycles, tested for impact and gear to hit them with lateral impact, you can actually stand on them, they never corrode, and they are about half the cost of a bronze seacock. Maybe I?m just being cheap, but I?m also pretty satisfied. _______________________________________________ Email address: [email protected] 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
