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Old 04-27-2017, 08:13 PM   #11
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Originally Posted by SHEPLMBR View Post
Check the holes up under the rim. They could be clogged
All of the holes would have to be plugged to prevent the air in the rim area from getting out that way, and so being forced out the jet hole instead. That said, it is good practice where I live (very hard water) to ream the rim holes out every so often.

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Old 04-27-2017, 09:52 PM   #12
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Originally Posted by frodo View Post
A vents ONLY job is to protect the seal of the p trap

all a vent does is cause the pressure in the plumbing system to be equal on both sides of the trap when the fixture is draining

without the vent, the pressure in the pipe when the fixture drains would be negative.

causing the P trap to siphon dry

Best definition of a plumbing vent I have ever heard.

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