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Old 08-04-2011, 23:27   #16
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Join Date: Sep 2007
Location: Southampton UK
Boat: Jaguar 22 mono called Arfur.
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Re: Will my boat sink?

Plumbers non-return valve. Available in threaded metal, brass is the obvious economic choice, bronze is dearer, but also in PVC and ABS for gluing or screwing.
A ball inside, usually a floating ball, allows water to flow out of the boat but not in. Cheap to buy and therefore replace, pretty strong, and a fit and forget item that only needs attention/inspection at the annual refit.
These will also help where water is pumped in by holding water above them (heavy ball sinks against the seat stopping water flowing out of the in pipe) and ideal for basin or toilet sea water supply.
I never got my 2" brass seacocks to move at all, they were left open over a long previous ownership and had seized solid. Plastic would have done the job just as well but would not have passed the insurance survey because they might have been prone to being knocked off. Now you can swing on these things at two inch bore, take them apart (split body screws together) and a child can open/close them, even a lady. I'd prefer to go PVC or ABS for all boat plumbing.
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Ex Prout 31 Sailor, Now it's a 22ft Jaguar called 'Arfur' here in sunny Southampton, UK.
A few places left in Quayside Marina and Kemps Marina.
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Old 09-04-2011, 08:21   #17
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Boat: Silverton 42
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Re: Will my boat sink?

Thanks everyone!
Cheers,
Bill
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