Very slow draining of brand new POP-UP DRAIN

[foreverDIYgirl]

Just installed a brand new bathroom vanity with sink (overflow at front edge), faucet and metal pop-up drain (upgraded from the plastic pop-up that came with faucet due to 2 lousy gaskets) which is otherwise very similar to the factory pop-up. The metal pop-up has 5 good gaskets so no leaks after teflon taping the drain threads (yay!). Faucet water drains well except for when you run it on high and engage the pop-up so that water fills the sink 1/3 or more of the way up. I cannot figure out why the pop-up drain drains so slowly for larger sinkfulls of water ... and if that can be rectified. Not a huge deal for me but if I get a boyfriend, he may want to shave in that sink.

I read that surface tension builds up in these pop-drains because of the smaller grids under the pop-up where the water flows through. Fyi, pop-up is aligned perfectly with overflow cutouts at 12 o'clock & 6 o'clock. Definitely no clogs in the line through to the waste line. Any ideas on how to get pop-up to drain at normal rate even after puposefully filling the sink? Thank you in advance for your expertise.

 

[Mattb1234]

Im having the same experience. All new plumbing, so there’s no chance it’s a clogged drain.

Drains just fine until a certain flow rate is hit then it starts acting clogged.
I hear a gurgling from past the p trap and the pipes(wall is currently exposed). But no bubbles coming up from the sink drain.

I found that engaging the drain closed then open again causes it to start draining again.

Any luck resolving your situation?

 

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[opplumbinghub]

Just installed a brand new bathroom vanity with sink (overflow at front edge), faucet and metal pop-up drain (upgraded from the plastic pop-up that came with faucet due to 2 lousy gaskets) which is otherwise very similar to the factory pop-up. The metal pop-up has 5 good gaskets so no leaks after teflon taping the drain threads (yay!). Faucet water drains well except for when you run it on high and engage the pop-up so that water fills the sink 1/3 or more of the way up. I cannot figure out why the pop-up drain drains so slowly for larger sinkfulls of water ... and if that can be rectified. Not a huge deal for me but if I get a boyfriend, he may want to shave in that sink.

I read that surface tension builds up in these pop-drains because of the smaller grids under the pop-up where the water flows through. Fyi, pop-up is aligned perfectly with overflow cutouts at 12 o'clock & 6 o'clock. Definitely no clogs in the line through to the waste line. Any ideas on how to get pop-up to drain at normal rate even after puposefully filling the sink? Thank you in advance for your expertise.

If your new pop-up drain is slow when the sink is filled more than a third, check that the drain is the right size and properly aligned. Adjusting the angle of the pop-up might help with surface tension slowing down the water. Also, make sure the drain line is vented and look for any debris in the P-trap. If it still drains slowly, you might want to get a larger drain and pop-up or ask a plumber for help.

 

[Reach4]

Are these lavatories vessel sinks or other sink with no overflow?

One troubleshooting technique is to push a soda straw through a drain hole, and see if that air passage makes things go a lot more smoothly.

Another thing is that the "water seal" must be between 2 inches and 4 inches. Some traps are reversible, and can be either. If your trap is set for a 4 inch water seal, reversing the trap can make a 2-inch water seal. If you make that switch, you must shorten the tailpiece or tailpiece extender.

 

[Mattb1234]

I returned the pop up drain and went with a grate style. This addressed it for me, I don’t really need to plug the drain.
It is a vessel sink without overflow.

I tried attaching a photo but I keep getting “file too large …” problems

 

[John Gayewski]

The pop up needs to be raised. Adjusting the linkage to allow the pop up to pop up farther will let it drain faster.