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Author:
Bobrob33 (KY)
I installed a new faucet and the drain that came with it had overflow holes. However, the drain was made of cheap plastic and kept leaking. I've since learned that it was leaking not because of the overflow holes, but because the threads were stripped and it wouldnt tighten up adequately. Anyway, I bought a new metal drain and since none of our sinks have overflow holes I figured I'd get one without overflow holes just to make extra sure it didnt leak and that worked. However, now, if I fill the sink up and let it drain, it makes suction noises, whereas previously it did not.
I'm assuming that because the overflow holes in the old drain acted as kind of a vent and let some air through I never had this problem before. I guess I can remove the new drain without overflow holes and put in an identical one with overflow holes but I'm not sure that'll totally address the problem (if there even is one)
I've previously opened up the walls between two bathrooms upstairs while renovating and saw a long PVC pipe which I'm assuming is a vent stack (pretty sure there's one in between the walls of each bathroom). So where does this leave me? Are the vents in between the walls sufficient or do I need to add an additional vent on each sink? Thanks!
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Author:
KCRoto (MO)
The vent supplies air and equalizes pressure after the trap, and it sounds like it is vented properly, you don't need to add vents to the sinks as they are already individually vented. If you are using a grid style drain instead of a pop-up, they can be temperamental and have problems getting air locked by an air bubble trapped under the grid while the sink is draining, but adding additional venting won't solve the problem unfortunately. changing to a popup style drain has its own issues that can cause just as many issues with frequent overuse of hand soap, hair, and shaving products. My personal opinion is that if you want to be able to fill the sink, get a popup style, if not, a grid drain will work fine.
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Author:
Bobrob33 (KY)
So basically I should be fine since there are vent stacks? I hear the suction noise with the new overflow hole-less drain *only* when I fill it up and drain it (which I never usually do). Do you think I should switch to a drain with overflow holes?
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Author:
steve (CA)
If the sink doesn't have an overflow, there's no need for an overflow drain.
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Author:
hj (AZ)
If the sink does not have overflow holes in it, then it makes no difference whether the drain fitting has them or not. The "sucking" noise is the drain working as good as possible. When it does NOT "gurgle" then you are starting to have a problem with a stoppage.
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Author:
Bobrob33 (KY)
Thanks hj! That sounds good to me! I just thought it was weird that the drains with the overflow holes dont make the noise but the one without the holes does and was wondering if it was a cause for concern. Glad to know thats not the case and i actually did the right thing for once lol.
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