Our washing machine is located in the basement. The drain feeds up to
the main drain, about 5 feet off the floor. The rubber drain hose is
looped up, down, and then up again to the drain. It's worked fine for
years but occasionally there are several inches of water in the
washer, even though the water supply is shut off and the machine has
been fully drained for days. Of course other drains....kitchen and
bathroom sinks, bathtub.....tie into the main drain as well but these
are all free flowing. Is there a check-valve somewhere on the washers
drain line that may be malfunctioning?
Thanks Terry. Actually the washer drain line rises about one foot
above the main drain before dropping down and tying in. It comes out
from the bottom of the washer, loops up about one foot, loops back
down, goes up about five feet and then loops down about one foot to
the drain. We've been using it for over 15 years this way and only
noticed the occasional problem in the last year. It always drains fine
and normally there's no backup.
I had a similar situation happen, only where my washer ties into the
drain is open to atmosphere. the washer tie in is of course a p-trap,
so gas should not escape....
the symptom i had occur was water would backup out of this p-trap, an
onto the cellar floor. the only reason it did not flow into the
washer was because the washer drain hose is not connected to the drain
The problem: Roots had reduced the flow through my sewer main under
the front lawn. So, under heavy drain use with showers, dishwasher
etc. the sewer connector was not letting enough flow into the street
system, the first place the sewer water could get out was my open-air
SO.... maybe you've got a sewer line problem with roots or other
blockage. That would explain why this is not a constant problem, and
why its a fairly recent manifestation.
The make, model# -might- help others help you :)
Too much info is better than not enough....
Appliance Repair Aid
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.