I just installed a sink drain.
The drain has two retangular holes (about 1" by 1") in it just below
the top surface
of the sink and above the underside surface of the sink (above the
What are the purpose of these holes? Seems like they just provide a
the outersurface of the drain and the inner surface of the hole in the
sink where the
drain fits. Drain water must accumulate in this cavity, I would think?
There should be an "overflow" slot in the sink up near the top edge.
The water that goes through the overflow has to be able to get into the drain
pipe, even if you have the plug in the basin, so it comes in the sides.
Thanks, this sink does not have an overflow slot, so they serve no
it. I guess any water that gets into these holes (gets caught in the
cavity) will have to just evaporate out. This is a guest bathroom
is not used often
I could try filling the cavity, but I would have to take the plug
Those slots let the overflow water into the tailpipe. If you don't
have an overflow, and the trap clogs, what's to stop water from backing
up out of those holes?
When I installed a sink with no overflow (integral glass bowl and
countertop) it came with it's own drain assembly that didn't have the
Well it sounds like you have a sink with an overflow that has a
tailstock that has no provision for that. So whoever put it in that way
made a mistake. If it's not used very often it's probably not a
problem. It would take water trapped in there a long time to evaporate.
I have kids and this would definately be a problem.
I'm not familiar with a vent under the sink. Usually the air is taken
in at the sink overflow which is on the inside surface of the sink near
the top as MasterBlaster posted, but I'm pretty sure that's what you're
looking at - vent holes.
That would be the over flow. Some sinks have them some do not. Your
drain (actually the part called the tailstock) should have rectangular
holes in it just below the stopper to allow the water that runs into
the overflow to drain out.
replying to spudnuty, Mike wrote:
I'm installing a drain and the water runs down the inside of the tailstock out
the vent holes and down the outside of the tailstock onto the inside of the
cabinet below. What am I doing wrong?
replying to Mike, Lorrie Hedges wrote:
Mike, I'm faced with the same thing. I have a custom sink bowl (no overflow)
and the water is running out through that slot in the drain pipe. From what I
have read on this site, some come with the slot and some don't. You need to
replace the drain pipe with one that does not have that extra slot/hole for the
overflow. I wish I had known this before. Practice, practice, practice.....
Thanks for everyone's posts.
replying to Lorrie Hedges, Hotrodky wrote:
This might have saved me more trouble. My new faucet has those holes and my
new sink doesn't have a drain hole. I had leaking and everything was tight. I
did have a small defect under the bowl where drain pipe gets tight. That's
where it was leaking. I looked at my other sinks they are bigger underneath and
overflow drains into those pipes. I will look for new drain pipes without holes
on sides. Other people had problems with this same vanity sink combo. They
used putty and silicone.
On Sunday, January 15, 2017 at 11:44:06 PM UTC-5, Hotrodky wrote:
Every slow draining sink I've seen, the problem was never the sink, it
was a clogged drain, incorrect plumbing, etc. The sink just has a
standard size hole in the bottom, now can it be the cause of slow
in the bottom
On Saturday, January 14, 2017 at 11:44:05 PM UTC-5, Hotrodky wrote:
Wow are you folks at HomeMoaners having all kinds of trouble. The OP
had a new drain with holes, now you have a faucet with holes and a
new sink that doesn't have a drain hole. Wow, are you all smoking
the same stuff?
I had leaking and everything was tight.
Every sink I've had, the overflow was integrated into the sink and there
was only the one drain connection at the bottom. Other types might exist,
but so far it seems HomeMoaners are the only folks finding them, buying
drain pipes with "holes on the sides", etc.
I will look for new drain pipes without
Probably a good idea.
Other people had problems with this same vanity sink combo.
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