GRP seacocks

[alan54]

A few years ago I bought some sea cocks for my steel boat. They were Lloyds approved and I felt they were great for a steel boat in reducing galvanic corrosion.
Problem is I have lost the name and telephone number of the company. I am sure they were around the Bath area and they did advertise in PBO at one stage.
Does anybody know the name or tel No. of the company? I have another steel boat and want to replace my sea cocks with their GRP one`s.
regards
alan

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[bob_tyler]

ASAP Stock them. Ask for their catalogue or look up on their web site. Perko white plastic skin fittings on p50 of the catalogue. There is a small discount for ordering online..

http:// [url]www.asap-supplies.com [/url]

I have recently purchased several items from them. Good prices and very good delivery.

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[HarryA]

Hi alan54
I am at the moment building a steel sailing boat.I have fitted stainless steel valves in all intake. when I look up the Galvanic table, I regret I did. ( 0.50V ). Do you as a steelboat owner recommend that I change to GRP before I set afloat?

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[Mudplugger]

HarryA..... Just had surveyor in to check progress on my steel project and informed that you can no longer use plastic skin fittings below the waterline...change them to s/s.......but have bedded them on thick epoxy..Tony W.

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[MainlySteam]

What authority forbids the use of glass reinforced seacocks (and thru' hull fittings to I assume) on pleasure vessels in the UK? Would be surprised if that is so as there are plenty of them fitted and if of reputable types (including similar construction industrial valves) provide excellent service, especially in steel and aluminium vessels.

With steel yachts if one insulates the prop shaft and the propeller from the hull, and uses plastic thru hulls and seacocks, one can build a hull that is electrically inert underwater and free from galvanic action from dissimilar metals apart from those in the coating system (zinc in primer, if used as some now recommend its omission, and copper in the antifouling both of which will ultimately react with the hull once seawater migrates through the micro structure of the epoxy undercoats).

As and aside, just bedding your ss seacocks on a thick bed of epoxy (a plastic by the way) will not prevent potential electrolysis problems - the fasteners have also to be insulated from one of either the hull or the valve. In my opinion the best solution on other than large vessels is to use a glass reinforced thru hull from a reputable manufacturer or a short ss nipple welded to the hull, onto which is screwed a glass reinforced valve.

John

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[HarryA]

Thanks everybody. My through hull fitting is a piece of threded pipe welded to the hull. So if I use a lot of epoxy on the thread and screw the valves back on and "paint" the inside, (ballvalve) with epoxy, this should last a while?
I realy want to keep the s/s valves. The biggest one are realy expensive!

<hr width=100% size=1>HarryA