Connect the washing machine to the sink drain if.
Tie washer drain into sink.
This is in virginia.
There are three rules.
If possible and applicable note.
But i assume from your question that sink doesn t have any drain.
Water is drained from the washing machine directly into the sink.
If the utility sink was properly installed it has its own drain.
1 install the drain hose into an installed 2 diameter drainage stand pipe.
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.
Do not tie it into the trap.
Other options for washing machine drainage in garage.
Do not connect it directly to a drain stand pipe unless the pipe is at least 2 inches in diameter.
The drain hose from the washing machine is hung on the edge of the laundry sink.
Using your utility sink s drain line measurement measure up from the ground and make a mark on your washer s drain line.
This install is in a basement so it would be very difficult to cut more concrete or run a separate line to the sump.
Washer drain hose to utility sink.
Something like this or this but in reverse.
The sink drain and the washer drain connect below the floor.
If that s the problem then your objective will work you can tie the sink drain to the washer drain.
Laundry sink waste ties in below the standpipe tie in.
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.
Locate your existing washer s drain line specifically where it goes down into the floor or wall.