Washer Drain

[CUTiger06]

First post here!

I have a friend who just bought a 1100 sf house thats about 40 years old. The previous homeowners did some cheap repairs to pass inspection for the sell. He and I noticed that in the basement (where laudry hookups are located) that there is no drain stack for the washer. There is a floor drain nearby and a seperate 4" vented drain stack for the bathroom above. I was wondering the best way to drain the washing machine. My thought was to add a drain w/ p-trap to the 4" drain stack. Any thoughts???

Also the 4" drain stack, as far as I can tell, use to be cast iron but was replaced with PVC.

[FloridaOrange]

First post here!

I have a friend who just bought a 1100 sf house thats about 40 years old. The previous homeowners did some cheap repairs to pass inspection for the sell. He and I noticed that in the basement (where laudry hookups are located) that there is no drain stack for the washer. There is a floor drain nearby and a seperate 4" vented drain stack for the bathroom above. I was wondering the best way to drain the washing machine. My thought was to add a drain w/ p-trap to the 4" drain stack. Any thoughts???

Also the 4" drain stack, as far as I can tell, use to be cast iron but was replaced with PVC.

Sounds like you're on the right track but you should run a 2" vent up to the floor above and tie in ~42" above the floor level unless you have a vent (not vented drain) line to connect to in the basement.

[CUTiger06]

how close to the floor do I need to tie into the existing stack? Any special methods for supporting the drain horizontally?

[FloridaOrange]

how close to the floor do I need to tie into the existing stack? Any special methods for supporting the drain horizontally?

Tie in down low, run a 18-24" stack up from the p-trap for the washing machine drain to tie into. That's typical, remember that the washing machine is pumping the water out on a dump cycle, the stack helps water from backing out of the p-trap.