Kitchen sink: sudden backup

Old 07-05-18, 06:00 AM
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Location: Northern Virginia
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Kitchen sink: sudden backup

Visiting a relative, whose kitchen sink has backed up suddenly. Relative says the sink was draining normally, but earlier this week she had a new sink installed in the bathroom next to the kitchen.

The kitchen sink filled and didn't drain; over a period of time the water gradually receded but then filled again, apparently "reverse draining" from the plumbing system?

There's also a dishwasher that connects to sink plumbing. The house was built in the late 1950s or early 60s.

The backflow problem is concerning. What causes that, and can you recommend a fix?

Old 07-05-18, 07:05 AM
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Location: North East Kingdom of Vermont
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What does the Plumber who installed the adjacent Bathroom Sink say about this matter ?

Last edited by Vermont; 07-05-18 at 08:06 AM. Reason: spelling

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