Tom - Mark - I need some help with this one, please. My sister in law has a two story townhouse. The drain (4" (?)) exits on the house on the left front. Going up stream of the drain is the downstairs half bath. From there, the drain rises to the second floor washer and bathrooms. The...

Have a question. My drain pipe (standpipe?) overflows SOMETIMES when we use the washer. SOMETIMES, the kitchen sink drain bubbles up with the washer's detergent. I've read about installing a compression fitting for the drain pipe, but wouldn't that make the water come up somewhere else (like the...

I have read all of the info I could find about washing machine drains and vents. We just bought a home with all new appliances and our washing machine backups every time we use it. The previous owner thinks the plumber suggested a vent to solve to problem. My problem is that we cannot even find...