Washing machine backs up in kitchen sink

[ted]

I'm thinking I need to install a back flow valve or check valve to insure this stops, especially since I'm about to install 2nd floor bathtub and shower drain in washing machine drain line on first floor.

Kitchen sink drains fine, although it is not a lot of water like washer, so I am assuming issue is volume of water produced by washer.

Please help. Thanks

 

[Matt30]

What you have is a partial blockage. Washing machine and kitchen sink should never share a branch. Have the drain professionally cleaned and you will not have any back up issues.

 

[ted]

have tried that and it did not help and in any case I can't take chance with bathtub draining into that line

cant do much about washer and kitchen on same branch either

 

[ExtraMilePlumbing]

What do you mean "it did not help" the guy you hired must not know how to open congested lines.

 

[phishfood]

Am I understanding correctly, that you have a drain that will already not handle the volume from the two fixtures that are attached to it, and you plan to add two more fixtures to it?

 

[frodo]

have tried that and it did not help and in any case I can't take chance with bathtub draining into that line

cant do much about washer and kitchen on same branch either

just because you tried that does not mean you did it correctly,
grease in a sink line is like a tub of butter, you can stick a knife thru it
but when you pull back, the hole closes.

call A PRO

 

[CT18]

Added more drains will only make matters worse.