Originally Posted by kb4srn
Herk, can you explain about burping the check valve? And what about the holding tanks. I don't want them to sit over winter dry so do I drain them and add antifreeze?
The city water connection has a check valve that will not be cleared if you only use the water pump inlet to flush the antifreeze. Remove the screened washer and you will see the stem of the check valve. With "pink" in the lines, put your finger in the inlet and push the stem to the side. It will allow antifreeze to enter the check valve. It will "burp" clear water and pink will follow.
The holding tank flush unit has a vacuum break (check valve) located above the tanks and the outside hose connection. When you remove the hose, water from the vacuum break down to the hose connection will back drain onto your shoes. You may have noticed that before (no worries it is clean water from the tap).
The water from the vacuum break to the tank "SHOULD" drain into the tank through the flush nozzle in the tank. However, water CAN remain inside the plastic nozzle or remain inside the plastic vacuum break. Obviously that would be bad.
I can reach the flush inlet with the hose from my outside faucet and, using an A-663 brass fitting, flush my shower faucet and the turboflush at the same time.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
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