Determining whether your residential washing machine drain pipe or standpipe is clogged rather than the washing machine itself involves observing wastewater behavior during a drain cycle. If the washing machine pump actively pushes water out through the drain hose, but water immediately overflows and spills out of the vertical wall standpipe onto the laundry room floor, the blockage is located downstream in your household plumbing drain line. You can troubleshoot plumbing blockages easily by observing overflow patterns. You can verify that your corrective action is successful when clearing the household drain pipe using a mechanical snake auger allows wastewater to empty rapidly down the standpipe without overflowing onto the floor.
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