Do any boat manufacturers put a shutoff valve on their raw-water intake thru-hulls? There was none on my '86MC or my '98CC. Do the newer wakeboard boats that come stock with dedicated ballast thru-hulls have shutoff valves screwed onto the thru-hulls? Seriously, I don't know either way. I'm currently putting in a dedicated ballast thru-hull scoop through my ski-locker. It is a big 1.25" one. I have a 1.25" ball valve for it but was going to put it about a foot away, attached to a support. I'd prefer to screw it on the thru-hull, but the ball valve is pretty heavy and I will actually be turning it on and off sometimes. I'm concerned that that much weight and turning torque might, in time, loosen my waterproof adhesive or crack my gel coat. Has this ever happenned to anyone, or should I just screw it on the thru-hull?
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