This is a condition known as syphoning. Your drain hose on the washer needs to go up before it connectes to the house drain. It needs to rise as high as the washing machine top then hook over the drain pipe. If the drain hose is pushed too far into the drain pipe this can also cause syphoning.
Here are some tips to help describe this better.
Is the drain hose extending more than 8" (20.3 cm) into the drainpipe?
The drain hose may be too far down inside the drainpipe (standpipe) or laundry tub. Drained water can siphon back into the washer if the drain hose extends too far. Make sure that the drain hose does not extend more than 8" (20.3 cm) into the drainpipe or laundry tub. Using the U-shape drain hose form (as described in the Installation Instructions), will provide the correct length of drain hose in the drainpipe or laundry tub.
Drain hose form
Is the drain hose taped onto the drainpipe? Is top of the drainpipe covered in tape?
Do not seal the drain hose into the drainpipe with tape. The drain hose should be loose, yet secure. There must be a gap between the drain hose and the drainpipe to allow air to flow. The air gap will break the suction. This will keep water from being continuously sucked out of the machine (siphoning) as it fills.
Is the drainpipe (standpipe) less than the minimum height of 39" (99 cm)?
Make sure that the top of the drain is at least 39" (99 cm) high (as measured from the floor.) If the drain is below 39" (99 cm), the water will start to flow out of the machine due to gravity. The flow of water can create suction (siphon) and the water will continue to drain out of the washer.
I have the same problem and want to know if there is a way to turn down the rate of pump emptying the washer
×