05 320 Water Side Vent

[H2ONUT]

Dock mate has a 320 and the fresh water pump constantly cycles and blows water out the side vent. Any idea what is causing this?

Thanks!


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[Lazy Daze]

By side vent, it sounds like you're referring to the hot water heater pressure relief valve thru-hull. The hot water heater will purge just like a home hot water heater when (if) the pressure builds too high. In this case, though, it seems like it's happening a lot, which shouldn't be the case. Most likely it's simply a failing pressure relief valve. Or, it was propped in the open position during winterizing (to help drain the heater faster) and was never flipped back down.

 

[H2ONUT]

Ok, that explains why the water was warm. I'll have him check that out tomorrow. Thanks!!


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[Sublimetime]

They will blow off if they reach to high of a temperature also, but this is very uncommon unless maybe it has a heating coil from an engine and that engine overheats.