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Old 05-20-2014, 12:20 PM   #16
psneeld
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City: Ft Pierce
Vessel Name: Sold
Vessel Model: Was an Albin/PSN 40
Join Date: Oct 2011
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Quote:
Originally Posted by On The Rocks View Post
Some say seacocks should be bolted to the hull, others say bolting to the backing plate is sufficient. Thoughts on that?
It's not bolting it down that's as important as the thinness of the threads of a ball valve just screwed onto a thru hull.

It's a system, not just a component, and you have to look at the weakest component. A ball valve screwed onto a thru hull with or without a backing plate, bolted or screwed or glued down is still probably stronger than the thickness of what is left of the thru hull pipe after they turn threads in it. screw on a ball valve, add a few years of erosion/corrosion inside and then apply a lateral force on the hose about 2 feet above that set up and see what fails pretty easily...the threads below the valve that's supposed to keep the water out.

I went with the Groco flange with appropriate ball valve screwed on top...much heavier duty and knowing that the ball valves with or at least might eventually need replacing due to the wonders of newer tech.

I believe its the easier more cost effective setup.
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