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Upstairs overflowing bathroom sink

Posted on 7/8/24 at 5:26 pm
Posted by habz007
New Orleans
Member since Nov 2007
4834 posts
Posted on 7/8/24 at 5:26 pm
I just got home…

We have upstairs Jack and Jill bathroom with twin sinks. One isn’t draining and is actually slowly filling with water starting sometime today. It’s filling with water despite the other one and upstairs toilet not being used.

All other sinks and toilets in the house and downstairs are draining appropriately (or so it seems).

The water is clear.

I don’t understand how this is going against gravity and only one single upstairs sink…

I’ll call a plumber, but any thoughts in the meantime?

Thanks
This post was edited on 7/8/24 at 5:27 pm
Posted by bbvdd
Memphis, TN
Member since Jun 2009
28167 posts
Posted on 7/8/24 at 5:38 pm to
Drain from your a/c is clogging with algae is the most likely issue.

This post was edited on 7/8/24 at 5:38 pm
Posted by habz007
New Orleans
Member since Nov 2007
4834 posts
Posted on 7/8/24 at 6:05 pm to
quote:

Drain from your a/c is clogging with algae is the most likely issue.


Thanks, someone else I texted also suggested A/C drain clog issue too…

I guess I’m just surprised the adjacent sink and tub are empty, and only one is filling.

We do seem to have an outdoor algae issue here.

Thanks…

It’s a slow fill and we’ll monitor it and empty this evening as needed. Will keep close eye and have plumber in the morning.
This post was edited on 7/8/24 at 6:10 pm
Posted by BilbeauTBaggins
probably stuck in traffic
Member since May 2021
7664 posts
Posted on 7/8/24 at 7:35 pm to
The AC drain probably had a more direct route through the existing sink drain that is draining slower. Go and try and flush out the AC drain if you can. Add condensate tablets every month.
Posted by chryso
Baton Rouge
Member since Jul 2008
13540 posts
Posted on 7/9/24 at 10:38 am to
quote:

Add condensate tablets every month.


Where do you put these?
Posted by gumbo2176
Member since May 2018
19444 posts
Posted on 7/9/24 at 7:07 pm to
quote:

Add condensate tablets every month.



Once a month I pour about 2 cups of household bleach in the drain pipe coming out of the unit and I don't have any issues with it not draining properly.

My unit is in a designated closet area, so I don't need to climb up in the attic to service the drain.
Posted by BruslyTiger
Waiting on 420...
Member since Oct 2003
4762 posts
Posted on 7/10/24 at 3:11 pm to
Normally on newer installations there is a pee trap and a cleanout or place to add chlorine.
Posted by FMtTXtiger
Member since Oct 2018
4991 posts
Posted on 7/11/24 at 7:08 am to
This just happened to mine

I knew better but was out of town and had no idea 2 units produce that much water.

It’s clogged in the plumbing where the ac drips into your sink pipe. you can see the connection under the cabinet.

I poured liquid drano down and it released. Will be doing it once a month now.
Posted by WhiskeyThrottle
Weatherford Tx
Member since Nov 2017
6964 posts
Posted on 7/11/24 at 7:39 am to
I was going to suggest pulling apart the P trap under the sink to make sure it isn't clogged.

You don't necessarily need a plumber or AC tech for the AC drain. They'll be happy to charge you for a 2 minute operation, but I just take my compressor into the attic and force air down the drain and it unlodges anything blocking it. Be careful though because the water in the P traps under the sink will shoot up into the bathroom. Might place a cup or bucket over the drain in the sink.
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