Smaller drain lines will not accommodate the.
Tie washer drain into sink.
The washing machine drain 1 5 would run horizontally along wall pick up the lavatory drain still 1 5 and wye into a 2 drain with the shower which then wyes into a 3 drain with the toilet and on to a sump.
It is not allowed to share a sink drain.
You may need a special drain hose depending on the distance of the washer to the sink.
Laundry sink waste ties in below the standpipe tie in.
Something like this or this but in reverse.
Third the pipe from the sink to the.
The reason we made the comments we did is that under most codes the washer drain must be 2 and tie into a larger drain.
This install is in a basement so it would be very difficult to cut more concrete or run a separate line to the sump.
Glue a 2 inch abs double sanitary tee to the drain inlet using abs cement.
Second the place where the connection is made between the sink drain and the washer drain must be lower than the bottom of the s shaped pipe under the sink.
You can install a bracket or wire ties on the back of the sink so the washer drain hose is permanently attached to the sink.
Tee wye off the vent for the sink above the standpipe waste at least 42 off the floor and if sink on the left in this photo then above the laundry box.
I d suggest making the loo.
I used a coat hanger to secure the washer drain hose from flying out of the utility sink and spraying all over the basement floor.
The sink drain may be wet venting the toilet which will then create problems for the toilet and the sink.
Water is drained from the washing machine directly into the sink.
Do not tie it into the trap.