Drain Utility Sink Into Washer Standpipe

The elbow remains filled with water preventing sewer gas from backing up into your laundry area.

Drain utility sink into washer standpipe.

If you can install your washing machine in the garage and next to a utility sink then yes you can let it drain into the sink. The original copper pipe was 1 1 4 and the new pvc is 1 1 2. You may need a special drain hose depending on the distance of the washer to the sink. This is the new pvc drain pipe.

If the washer standpipe is pvc and the sink drain will be pvc of the same size the connection is easy. 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. The standpipe assembly keeps. Discharging the rinse water into a standpipe keeps the tub clean.

A standpipe is a vertical piece of pipe with an elbow on the bottom. Older laundry tubs drain the washing machine leaving dirt and soap scum stains.