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zenox 11-01-2012 09:42 AM

Can a sump-pump drain to an existing washing machines drain?
In my basement, I currently have a Washing machine and dryer. In the same room, there is a small hole that my water system sometimes drains into [image available here]. The problem is that sometimes this hole backs up and I end up with water on the floor (up to about an inch).

This has not been a problem before as the basement was relatively unused (we moved in just over a year ago and have slowly been fixing things up).

We want to start using the basement (its mostly finished except for the concreate floor). I want to make sure that I try to eliminate any water hazards before doing any flooring, so my thought was to install a sump-pump where this hole is. The only problem would be where it would drain to. My thoughts were to put the drain into the same drain as the washing machine. Would this be acceptable, or would that be to much water for the drain to handle?

DannyT 11-01-2012 11:42 AM

no. the sump pump needs to drain outside. usually they are connected into the drains for the downspouts and go into the storm drain or at least out to the curb like they do in my neighborhood. the hole in your photo looks like a floor drain. do you know if it is connected to the sewer lines or does it just go into the stone under the floor like i have seen them do in the past with condensate drains?

zenox 11-01-2012 11:49 AM

Thanks for the info!

I'm pretty sure the hole just goes into the stone under the floor... if I look into the hole I can see water about... ~10 inches down, so I really hope its not sewer :) [It also does not smell, or did not when it backed up the once].

Jackofall1 11-01-2012 11:58 AM

Chances are the water you are seeing in the hole is water in the trap. Are you on city sewer or septic?

Typically the washer discharge is fed into a dedicated vertical drain line, not poured out onto the floor.


zenox 11-01-2012 12:00 PM

I'm on septic. Its not the washing machine that feeds into the hole in the floor, its something to do with the well. I believe its some type of filter that rises out every once in awhile (around once a month).

Jackofall1 11-01-2012 02:04 PM

I'm sorry, I didn't read that quite right, that is a water softener and it discharges when the softener regenerates. You could put the discharge into an above ground sump (15 gallon plastic drum) and pump that into the yard, but, the discharge is slightly acidic, which could be a problem for any plants or grasses.


AllanJ 11-01-2012 07:51 PM

Do not run the sump pump water into the septic system. It will cause an overload (overflow) at the leach field.

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