Quote:
Originally Posted by tomtauto
We cover the bowl of the commodes with Saran Wrap which prevents the evaporation of the water. We are usually away for six months—most of the water is still there when we return. We also cover or use the drain plug on all sinks and shower drains. This keeps the water from evaporating out of the traps.
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I would not cover or close the drain plugs. But, if you do, I would make sure that you shut off the main water valve to the house. Otherwise, a small faucet leak could cause the sink or shower stall to overflow.