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Old 05-30-2007
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Replacing SeaCock Gate Valve with Marine Ball Valve

Hi,

My boat has gate valves for the freshwater intakes one for the head and the 2nd for the freshwater intake for the engine. My surveyor told me that I should replace the gate valves with Marine Ball Valves for safety. I think it will be a pain to remove the old gate valve since its flush with the floor and connected to the through hull.
My question is would it be possible to keep those gate valves in open position and just add the marine ball valve right behind it so the series goes Hull==>Gate Valve (open pos)==>Marine Ball Valve?

can you use something like this

http://www.defender.com/product.jsp?path=-1|51|106370|813148|319675&id=102487
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