Hot water overlow???

[rgreenwell8962]

Just noticed that hot water is coming out of a drain, maybe an overflow from the hot water tank?? When the hot water heater is on while hooked to shore power and the pump is on, hot water continually is pouring overboard. What could cause this???
Thanks for the help, again.

[Phillbo]

Is there a pop off valve on the system? You may have a t-sat that went bad and is on all the time causing the water to boil and pop the valve. Not sure what boat you have but I would think there is not a thru hull for that and it's filling the bilge up to the point that the bilge pump is kicking in to pump it over board.

[rgreenwell8962]

Oh yeah, its a 2001 2500 scr. Looks like a direct line from the hot water tank to a thru hull. Tstat? Where would it be? Thanks for the reply!

[Phillbo]

Thermostat.. I was thinking it may be bad and causing the element to stay on all teh time and boil the water... but, I'm rethinking that. Does the water stop pumping out the thru hull if you turn off your water pump??

[rgreenwell8962]

Yes.

[shrew]

Depending on the model of hotwater tank, you should have a drain at the bottom of the tank and an overflow valve on the top of the tank.



Which is leaking on your model the overflow vent on the top, or the drain at the bottom?

[rgreenwell8962]

Top overflow. Just like the pic. The overflow goes thru hull

[shrew]

IT might simply be a bad pressure valve. IF it leaks a little, over time the pressure in the water lines will drop causing the pressure pump to cycle on for a second, then shut off. Depending on the nature of the leak, this could be more or less frequent. I would try replacing the release valve first to see if that resolves the issue.

[rgreenwell8962]

Thanks Shrew! I am going to wait til we get back from our trip to break it down. I will let you know what happens.