. . . "The anti - siphon clip is included with the installation parts package tin yore washeI : Another way siphoning can occm _ is if the standpipe is stttfl'ed with rags or other items that prevent air fl'om escaping with the water : _ dr flow is needed to break the suction . ?????? Check to make sure only the straight part of tile drain hose is inserted into the'standi ) ipe ; no ribs of the dra" .