Ok, here are the details:

23 YO ranch style house, with laundry in unfinished portion of the basement. My washer/dryer are hooked up, and I would like a utility tub/sink down there next to the w/d.

There is already a second set of hookups for the h/c water where the washer is hooked up, so the water source is ready to go.

Unforuntately the only drain pipe I can see within a reasonable distance is the standpipe for the washer.

I've tried to research on this site and many others, and cannot get a solid enough answer.

Is it OK for me to cut the standpipe, fit a W connection and let the sink drain into the standpipe? I've seen that I should not have a p-trap on the sink, as this could create a double p-trap with the washer. It also looks like I must keep the original height of the standpipe when I fit the Y.

The standpipe is all by itself, and goes into the foundation, I'm not sure where it goes from there.

Any advice is appreciated. Thanks.

The problem with that idea is that if the standpipe even partially backs up it comes out in sink. This set up would be just peachy in draining the sink but I have concerns about the discharge from the washer. Is there another way? Regards Tom

Thanks for the response -

There is a space down there that is roughed in for a bathroom - although we are actually going to have a bathroom put in down there at some point, and It might look funny having a sink in the middle of the room.

There is another drain coming from the bathroom above the basement, but it is maybe 10 feet away from where the sink would go.

There may be another option. Drain the sink into the existing drain and drain the washer into the sink. Perfectly acceptable. Not as nice as separate drains though. You loose some use of the sink when your running the washer. e.g. You can't put your dirty clothes in it etc.