We have a smell that I'm sure comes through from the standpipe when washing machine is in use. The standpipe doesn't seem to smell after use though(like this evening, last wash was earlier in day). The waste hose is loose on floor and then loosely hung into the standpipe about 6" . The hose is not clipped to the back of the machine (which would make the pipe vertical, then horizontal to the standpipe , would this cause some form of backflow having it loose? The reason I haven't used the mounting clip on back of machine as it then stops the machine being pulled forward and looks to put pressure on the hose going into the standpipe. Hose is bottom right of rear (if standing in front of door) and clip vertically above it. Standpipe is on left side wall . If I removed the bend thing then it may be mountable.
Yes there will be a little stagnant water but there always is the pump is in the bottom of the machine and it can only push water out as long as there is water to push when the pump stops the pipe is still full any extra pipe on the ground will add to that amount but a couple of inches won’t be more than a cup or 2 added to what is there no washer that I know of empty’s that last quart or so of water.