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We recently purchaced a 2013 big sky 3402. We took a 5 day trip to work out any bugs. All went well until I tried to winterize. The Hot water bypass valve was turned properly, as was the "winterize" valve. When the water pump was turned on, it ran constantly, with no faucets running! Worse yet, no antifreeze was sucked into the system!! Upon investigation, I found what appeared to be a white "check valve stem"(??) inside the antifreeze inlet! I inserted a small piece of plastic tubing into my short antifreeze hose to "actuate" the valve. Antifreeze was very slowly sucked into the system when each faucet was opened. Any ideas as to the purpose of this "valve", and why the pump ran constantly with no faucets open, and why the suction was so poor even when valve was gerryrigged open? Any suggestions,answers would be much appreciated.
Kim
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