Install Sump Pump Check Valve on Washing Laundry Machine

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JoeThomas

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Just purchased a Everbuilt THD1020 (In-Line Sump Pump Check Valve) , and installed in the back hose of our washing machine. The original hose would leak detergent soap and water. Is it a good practice to install In-Line check valves like this on washing machines? Are there any negative consequences, issues with flooding or clogging from doing this? The original hose kept leaking, so decide to get this instead. How does this fit in state california rules?

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Terry

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Kreemoweet

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That device may not be acceptable under your Plumbing Code. Clothes washer discharge is required to have an "indirect waste"
setup by means of a standpipe. This requires an airgap/airbreak at the entry to the standpipe which that checkvalve doesn't seem to provide.

The actual drainage system problem you have (which is not normal) should be addressed directly.
 

Jadnashua

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The code for WM drain pipes has been 2" for awhile now. Smaller worked with older machines, but many of the newer ones spin faster and therefore, discharge the water at a higher rate, and a 1.5" line won't always handle it. A commercial WM will also probably pump/spin faster so there's more turnover to generate more revenue.
 
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