Forum Discussion
Dutch_12078
Jan 28, 2017Explorer III
Nothing weird about it at all. The same thing can happen in a residence when a shower is equipped with a handheld shower head with a separate shutoff that's left off with the valves on. It may take longer for the problem to show up in a residence, but that's just a function of the longer pipe runs. It can be fixed with a set of check valves at the inside and outside faucets, but it's probably not cost effective for the few times the issue occurs.
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