I have a 27 in' EL Mustee uitlity tub in the basement that takes the drain water from the washer. When it rains badly, water backs up into the tubs and somtimes spills over. The tub drain pipe drains to a pipe that goes into the discharge to the sewer. Are there any drawbacks to putting a check valve in the tub drain line? The drain line is 1 1/2 PVC. So would I cut the pipe and install the check in the middle or replace the entire pipe with a check already installed.
TIA
Ken