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Old 11-09-2015, 04:34 PM   #1
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Laundry drain overflow


Hello,
I have a situation where water can overflow from the washing machine drain pipe when the kitchen sink above it drains. This does not happen during normal use of the kitchen sink, but if both bowls are filled and then drained all at once, the water pops up out of the washing machine drain. I've attached a picture, hopefully, that shows the kitchen sink coming down from above, and the washing machine drain ties into it, and they both run straight down. Thanks for any suggestions.
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Old 11-09-2015, 04:49 PM   #2
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The pipes are coming out of the wall instead of the floor. Turn your picture right side up.

Seriously I see several problems here.

1. There is no trap for the washer.
2. The metal pipe looks like it might be too small. The abs pipe is being reduced sown in size.
3. If the problem never existed before, then the problem is likely a blockage In the metal section of piping.
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Old 11-09-2015, 05:19 PM   #3
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You must get some awesome smells out of that washer drain... Not to mention a total lack of a vent.
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Old 11-09-2015, 05:21 PM   #4
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Wow. Yea. Im with joed. Also, you have a pvc couple joining 2 pieces of abs. Probably glued, which isnt good. You also have some sort of couple between copper and abs at the bottom which i dont recognize. Lots of issues man
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Old 11-09-2015, 05:33 PM   #5
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did someone say code violation
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Old 11-09-2015, 05:36 PM   #6
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Good thing the line is blocked or it would smell wonderful down there
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Old 11-09-2015, 05:55 PM   #7
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The drain has been set up this way for the past 9 years, and that's how it was when we bought the house. I never noticed sewer gas coming from there. We're selling it now, and that's where the issue was brought to our attention, from the home inspection. It wasn't an issue draining under normal use, just when the upstairs sinks were filled up.
Would adding a trap help with the issue I'm having? Would adding a vent help with the issue or do I need a taller stand pipe for the washing machine drain?
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Old 11-09-2015, 06:21 PM   #8
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I don't think adding a trap will help but it should be done.
A vent might help. It depends on what the actual problem is.
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Old 11-09-2015, 06:25 PM   #9
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Quote:
just when the upstairs sinks were filled up.

Would adding a vent help with the issue
Ayuh,.... It's ventin' through the sinks above now,....

Donno 'bout code, but, Ya, a vent will help the flow, 'n a trap will stop the sewer gases,....

Where does the metal pipe go,..??
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Old 11-09-2015, 06:42 PM   #10
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Have you discussed a compromise with the prospective buyer or do you want it fixed properly?
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Old 11-09-2015, 06:59 PM   #11
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The copper pipe goes into the basement floor, where I assume it joins up with the toilet and shower drain somewhere underground. I don't plan on digging up the basement floor to run all new drain pipe if it needs to be a little larger, but would install a vent and trap if required. The main issue raised during the inspection was the sinks backing up into the drain when filled up and drained, so that is my main concern.
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Old 11-09-2015, 07:35 PM   #12
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Quote:
Originally Posted by frylock11 View Post
The copper pipe goes into the basement floor, where I assume it joins up with the toilet and shower drain somewhere underground. I don't plan on digging up the basement floor to run all new drain pipe if it needs to be a little larger, but would install a vent and trap if required. The main issue raised during the inspection was the sinks backing up into the drain when filled up and drained, so that is my main concern.
That's up to you to have it fixed properly.

Whatever you decide to do, I would start by snaking the line first. As suggested, may just be a blockage somewhere. Kitchen sink drains are notorious for blockages. I'm guessing that metal pipe is partially clogged.

Remove trap in sink and snake from there, make sure that line is clear. Then snake the washing machine drain line, make sure that's clear. See if that helps. Just a suggestion.
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Old 11-09-2015, 07:59 PM   #13
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Wow. . .This is all sorts of bad

The first problem is that the pipe reduces in size basically acting as a funnel, under full load if it cant clear it fast enough its going to find a different route.

It needs to be redone professionally, but that involves some major rework.

What you could do, is have the drain cleaned and get rid of any corrosion buildup that might be causing food debris to get caught and over time restricting more of the flow.

Second is to extend the laundry pipe horizontally as long as the code permits before needing to be separately vented, add a trap and make the vertical distance correctly for the laundry. This was if it backs up with may not make it all the way to the top of the laundry pipe and overflow.

Again this is a diy fix, and i suggest having it fixed properly.

Good Luck!
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Old 11-09-2015, 08:05 PM   #14
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Just hope they don't have a real plumbing inspection.... I got a bad feeling.
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Old 11-09-2015, 08:55 PM   #15
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If I were buying this, I would say this failed the inspection contingency, get my earnest money back and walk. Tip of the iceberg I fear.
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