We just purchased a new large capacity washing machine (old one was not large capacity) and now the drain pipe overflows if you use the medium or high water setting. The drain pipe is ABS 1 1/2" and runs approximately 20' before emptying into the 4" sewer line. Is this machine pumping to much water for the line to handle? Should I replace the 1 1/2" with 2"? I have run a drain snake all the way down the line and it appears to be clear. Any ideas?
Thanks
Thanks