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bill
Re: Backup from washing machine into kitchen sink

Kitchen sinks and Landry connections are not allowed to be connected to the same pipe. they must be connected independently to the main drainage pipe. redo your piping.

Diver64
Re: Backup from washing machine into kitchen sink

Thanks for all of the answers, guys. I replaced the 1.5 in black water line with 2 in drain pipe as suggested and installed a vent outside of the house in the 4 in main line by digging up the main line, cutting the line, installing a t with a 2in pipe and putting a short U in it like you see in dumps and such places.
No back-up issues anymore and since this is only for the gray water out of the washing machine and kitchen sink I have no odor at all.
When replacing the drainage line I also put a clean out end on it as the original pipe did not have one.

Diver64
Re: Backup from washing machine into kitchen sink
bill shack wrote:

Kitchen sinks and Landry connections are not allowed to be connected to the same pipe. they must be connected independently to the main drainage pipe. redo your piping.

I may not have been clear on this. The lines are separate and go into the main line at different points. They are not joined together before attaching to the main lines.

Mastercarpentry
Re: Backup from washing machine into kitchen sink

Thanks for coming back and sharing your solution. I wish more of the folks we try to help would do this!

Phil

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