I just added a laundry drain to my main level closet. I chose this because it abuts my wet bathroom wall. So in the picture with the tee, you can see that I found a tee to tap into. The existing horizontal branch goes to my bathroom sink. The other horizontal branch had galvanized pipe in it and was run for an additional bathroom sink (double vanity) that was never installed (it was capped). So I removed the galvanized pipe, and tapped into the tee for my new laundry drain. See pictures. I stuck with 1 1/2 because that was the size of the cast iron tee, and it seemed pointless to use 2 inch drain into a 1 1/2 hub. Plus my washer manual says 1 1/2 is sufficient for my washing machine.
The problem arose when we did the first load of laundry. It was a large load. After the load was done, we discovered that the bathroom sink had filled and flooded over onto the bathroom floor. So I figure its either a clog that is common to both fixtures, or maybe, just maybe the force of the washing machine drain is "shooting" water straight across the tee and into the sink. So I tried the following.....
I held the stopper in the sink down and plugged the sink overflow. Then we did a test run of a large load of laundry. It tried to fill the sink, but holding the sink drain closed stopped it. No other fixtures flooded (toilet, bathtub), and neither did the new laundry drain. This leads me to believe that the tee in the picture is not suitable for this situation. If that is the case, I assume I will have to cut out the tee and convert to PVC with a different type of tee at that location so the water doesn't "shoot" across the tee. If so, I will also switch the laundry drain back to 2 inch.
I need advice on this, is "shooting" water across a straight cast iron tee, especially when the water is fast moving like from a washing machine, even a thing? Do you think that is my problem?
Thanks all for your help. Hopefully my pictures will load ok and the text isn't too small.
The problem arose when we did the first load of laundry. It was a large load. After the load was done, we discovered that the bathroom sink had filled and flooded over onto the bathroom floor. So I figure its either a clog that is common to both fixtures, or maybe, just maybe the force of the washing machine drain is "shooting" water straight across the tee and into the sink. So I tried the following.....
I held the stopper in the sink down and plugged the sink overflow. Then we did a test run of a large load of laundry. It tried to fill the sink, but holding the sink drain closed stopped it. No other fixtures flooded (toilet, bathtub), and neither did the new laundry drain. This leads me to believe that the tee in the picture is not suitable for this situation. If that is the case, I assume I will have to cut out the tee and convert to PVC with a different type of tee at that location so the water doesn't "shoot" across the tee. If so, I will also switch the laundry drain back to 2 inch.
I need advice on this, is "shooting" water across a straight cast iron tee, especially when the water is fast moving like from a washing machine, even a thing? Do you think that is my problem?
Thanks all for your help. Hopefully my pictures will load ok and the text isn't too small.