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jay1748

Toilet not flushing

Jay1748
11 years ago

I have a toilet which is apparently vented together with the sink through an under the counter vent plumbed into the sink drain. When you flush the toilet, it will not flush until the vent is unscrewed. I have replaced the vent cap, to no avail. There is no through-the-roof vent on this system. It has been working perfectly for two years up to now. Any thoughts?

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