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Old 11-07-2008
DrB DrB is offline
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Three-Way Valve for Engine Sea Water Intake

I am sure that someone has thought of this before, but anyone here install a three-way valve as the primary shut-off seacock for sea water intake for engine coolant?

Why would anyone want to do this you may ask? I was thinking of doing to make it easier to winterize my motor. The three way is a T configuration that has valve that directs the primary flow to either one side of the T or the other depending on on which way the valve is turned. I would install the valve and plug cap one of the T sides and connect the other T side to the impeller pump/motor. Under normal operation, the valve would be turned in that direction. When I want to shut the water flow to the motor, I'd flip the lever to the other T side, which is plug capped so it won't leak.

To winterize the motor, I'd remove the plug cap and connect a nipple w/hose tube to the valve. Put the other end of the hose into a bucket of Antifreeze and then flip the valve to the open the flow that way.

The benefits, as I see it is that I never have to remove a hose from the sea water system to put in anti-freeze. This is a pain as my hoses are REALLY tight on my fittings. The down side is that the valve is never truly closed to the sea. The seal is the cap plug.

Thoughts?

DrB
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