Clogged water heater?

[timmotel]

I was working on getting the boat ready for the water last Friday, and I was getting no pressure from the hot water lines. I bypassed the water heater and pressure was great. I have a seaward f600 has anyone ever experienced this? Can this be as simple as blowing it out with an air compressor, or is it this back floe preventer built in that failed?

 

[rawidman]

quote:

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Originally posted by timmotel

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There is usually a check valve in one of the connectors (I don't remember which). Yours could be defective, you could have removed it when you took things apart and put it back wrong, or you could have the hoses reversed.

 

[Audrey II]

check for a mess filter on the inlet line. It may just be clogged.

 

[timmotel]

Ron:
You are correct. The cold water line has a bronze check valve. I tried to free it up, but it is still sputtering, so I will have to replace it.

Dave:
No screens in the system except at the city water inlet and the pump inlet. Both were clean though as part of the winter lay up.

 

[rawidman]

The potable side of a water heater is basically just an insulated tank. The inlet side has a tube that directs the incomming cold water to the bottom of the tank where the heater elements are, and the outlet side picks up water from the top of the tank.

If you remove the check valve from the inlet, you should be able to run water through the tank from either direction as well as in or out the drain. There isn't a place to clog, and since the water is probably already filtered by a screen on the pump and you're using clean water to begin with, there should be nothing in the system to clog it anyway.

There's an anode in the tank but if it broke, the pieces would sink to the bottom. They would not block the flow.