If backflow and other types of drainage problems are to be avoided, the WASHING MACHINE DRAIN HOSE should be kept in a good condition. The drain hose must be kept clear of kinds & loops. The amount of twists & turns in the hose between the washing machine and the standpipe should also be kept minimum. Moreover, when the washing machine is slid to a different position, one has to be careful not to crush the WASHING MACHINE DRAIN HOSE.