[donf]

Tom - Mark,

Yesterday, when the <clothes> washer went into the spin cycles, gray water was blowing out of the stack.

The drain system had been cut into sections so I was able to disassemble the stack and found the blockage at the exit of the "P" trap.

I cleared the blockage and the washer works fine. However, there is now a gray water backup into the kitchen sink.

Any suggestions?

[ballengerb1]

I assume you are talking about a clothes washer, right? Sounds like when you rodded out the line you also moved the clog downstream. Is there a clean out down stream of the sink trap, if so rod from there with a 1/4" snake. You will hit a 90 elbow about 5' into the wall and the 1/4" can make that bend. If you find a clean out then use a bigger rod.

[donf]

Bob,

Okay, I'll see if I can find another clean-out. Right now the only one I can find is outside at the rear of the house.

Here is a sketch of the layout. The sink is about 6' from the rear wall of the kitchen where the clothes washer drain line is.

[ballengerb1]

The washer's connection to the drain line may also be a place to insert a 1/2'or larger rod if you can fully open the connection and get in there. I am having difficulty getting my head around your sketch. The sink is in the dining room?

[donf]

I'm a qualified horrible artist!

No the dining room is to the front of the galley style kitchen.

[speedball1]

there is now a gray water backup into the kitchen sink.

I think Bob nailed it when he sais;

Sounds like when you rodded out the line you also moved the clog downstream.

And now your blockage is dowstream from the kitchen sink. If you can't find a cleanout then rent a sewer machine and snake from the kitchen roof vent. Put out enough snake to reach the base and 20 feet more. Good luck, Tom