Hi there, this boat came with some very convenient bypass valves on the hot and cold side of the hot water heater, with a braided steel hose (toilet tank kind) in between them. To bypass the HWH all you have to do is turn each knob to bypass...... or so I thought. Here's what's going on....
I followed Rich Lemieux's checklist and drained the HWH with a length of hose into the bilge. Then used a compressor (only 25psi of air) in to the HOT (out) side with the water line pulled off to completely drain out the HWH tank. Next on the checklist is to put a gallon of antifreeze in each of the 3 tanks. With the other two valves turned to OFF, you turn on the FWD tank at the manifold and run the sink in the head until you see antifreeze. Somehow Anti freeze filled up the Hot Water tank during this process!! Anti freeze did in fact make it to the head sink faucet but most the entire gallon of water ended up back in the hot water tank.
My only thought is that the valve on the COLD side (in) is broken in the open/normal position and only the handle is turning.
In the attached picture you can see antifreeze coming out of the open drain. Am I missing something here? Tomorrow I plan on pull off the hoses and just connecting them with a short piece of hose in between them, the old fashioned way to bypass.
Thanks again for the help!
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Jackfish Girl, 1999, C36 MKII, Tall Rig, Wing Keel, In-mast furling, Phinneys Harbor, Bourne, MA