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All my supply and discharge lines are inside the coach. Only the two tanks w/drain, and low point drains are below and exposed. I blow out the supply lines, empty the fresh water tank, drain the water heater, and put RV antifreeze down all the drains and into the black tank. Should thie RV antifreeze be adequate for the black/grey tanks and dump plumbing that is below?
JC
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JimC
"Never promise more than you can give. Always give more than you promise."
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