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  1. Absent in the article is reference to the potential for occurrence of cross connection between hot and cold water systems when the washing machine solenoid valve fails to provide 100% shutoff during periods when the machine is idle. This typically results in complaints of inadequate hot water to the shower when used, especially in condominiums where space is not available to install a standard check valve arrangement. Currently there is no plumbing parts supplier providing a check valve short enough to fit between the washing machine and supply hoses in the typical condo stacked washer / dryer situation.
    It is possible to make your own if you’re handy enough.

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