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Old 01-29-2012, 09:10 PM   #1
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Leaky Washing Machine Drain Pipe


Hello,

After 5 years of use my washing machine started backing up in the drain pipe. Wasn't sure why this was happening. Did some searching on the internet and people mentioned that the drain pipe should be at least 2". My old drain pipe was 1 1/2 so I decided to change it. While cutting the pipe I noticed that the cast iron pipe was loose where it connected to the cast iron bell right at the basement floor. With that said I removed everything from the bell up. After replaceing all the copper to ABS I tested the washing machine. The pipe didn't backup but I saw water leaking from another pipe. I included a pic of the setup. I did snake the line the other day and didn't find anything. I am going to try snaking the line again.

Thanks
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Old 01-29-2012, 09:22 PM   #2
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Leaky Washing Machine Drain Pipe


The pipe below is backing up ,water is standing the pipes to atleast that point.
why do you have your stand pipe tied in so high to the stack?

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Old 01-29-2012, 09:29 PM   #3
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Leaky Washing Machine Drain Pipe


Hello,

Thanks for the reply. When you say stand pipe are you talking about the drain pipe? Sorry not familiar with all the plumbing terms. I replaced the ABS the same way the previous person installed the copper pipes. Should the drain pipe be further down, below where the mail line splits?

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Old 01-29-2012, 09:32 PM   #4
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Normally I tie the san tee or wye for the washer line in about 16-18" to center off of floor,that way you can put around a 30" standpipe on there without it making the washer pump water so high
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Old 01-29-2012, 09:46 PM   #5
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Leaky Washing Machine Drain Pipe


If I put in a new wye and then have a 30" drain pipe, would I need to install a p-trap or can I leave it a straight pipe from the washer drain all the way to the wye?

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Old 01-29-2012, 09:54 PM   #6
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Leaky Washing Machine Drain Pipe


You need a p-trap at bottem of stand pipe to keep sewer gas out of house
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Old 01-29-2012, 10:00 PM   #7
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Ok... Do you think it would be wise to lower where I have the p-trap and drain line. Currently the drain pipe I have is 17 inches from where the washing machine drain pipe connects to the ABS to the p-trap. lowering it I could make it 25 to 30 inches long.

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Old 01-29-2012, 10:06 PM   #8
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If its working where you have it installed theres no reason to reinvent the wheel,if you ever do some replumbing in that area consider doing it then.
Unless youre really bored of course!
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Old 01-29-2012, 10:18 PM   #9
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From looking at your picture.... It looks to me that you used ABS glue to connect the PVC(white) pipe to the ABS(black) pipe? If this is true then you need to get some transitional glue(green glue) or use a rubber coupling. You can use a coupling made for cast iron if you like. Hope this helps.
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Old 01-29-2012, 10:25 PM   #10
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I figured it was all pvc above the cast iron that somebody got bored and started painting black
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Old 01-29-2012, 10:30 PM   #11
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That's funny. Black matches everything.
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Old 01-30-2012, 07:07 AM   #12
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Yes I did use ABS glue to connect the ABS to PVC. That was my fault, the green glue I had dried out and it was to late to run to the store. I really didn't think the water would backup all the way from the bottom to that point in the picture. I will replace those two connections with the correct glue. Back to my original question, why would water back up that far up the pipe?

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Old 01-30-2012, 08:13 AM   #13
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Quote:
Originally Posted by sweetwaters View Post
Back to my original question, why would water back up that far up the pipe?
There is insufficient venting, or a partial blockage down below, so the drain as a whole can't accept the water as fast as the washing machine is outputting it.

So far you are fortunate that the washing machine standpipe is as high as it is and that the washing machine finished pumping out before the water backed up as high as the top of the standpipe since you may not splice onto the washing machine drain hose or seal it onto that pipe.
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Last edited by AllanJ; 01-30-2012 at 08:20 AM.
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Old 01-30-2012, 08:13 AM   #14
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It backed up that far because theres no lower laying point for it to come out of yet,once it hits top of stand pipe youll know it
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Old 02-04-2012, 06:00 PM   #15
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I snaked my line tonight a when I pulled the snake out there was a lot of this black sludge stuff on the snake line. Anyone know what this might be? When I was putting the snake in the drain it got so far and then I had to use force to push the snake further down the drain line. It doesn't smell like sewage. Has an oil like consistancy. No idea what this could be.

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