How can I add a basement utility sink what will be below the main sewer discharge?

StaceyNeil

StaceyNeil

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The main sewer line exits our 1956 ranch house about 6 feet off the basement floor level.

Since we've recently renovated all the bathrooms and kitchens and installed lovely new fixtures, we now have no place to wash paint brushes and other messy things. I would love to install a utility sink in the basement for that purpose. However, the trap would obviously be lower than the sewer discharge.

There must be an approved way to do this... some type of pump. Can anyone advise the most cost-effective set-up? Can we just add a pump (which type/size?) and tie into an existing roof vent? (or simply install the sink close enough so we don't need an additional vent?)

At some point we may want to relocate the washer/dryer to the basement, and presumably the washer would also need a pump.. or could they share one?

Thank you!
Stacey
 
Hi Stacy,
For a utility sink and washer drain I would recommend using a Liberty Pumps Model 405 Drain Pump.

It's 1/2 HP pump will pump over 40 gallons per minute and easily handle the washing machine discharge.
The container has a 2" inlet which will allow the washing machine to discharge into a standpipe and the sink to never have water appear in it from the washer discharge.

Yes venting is required for both the container and the laundry standpipe and sink they can be properly tied into an existing vent.

I have done many of these installations and never had a complaint on any of them.
 
Last edited:
Thank you!

Would something like this work?


Little Giant Sewage Pump System
4/10 HP sewage pump, 80gpm @ 5'
little-giant-9s-smpx-lg-simplex-package-system-509109-a.jpg
 
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That is designed to have the basement floor cut then dug out with the piping and container put in the floor.
Typically used for a basement bathroom. Also not one of my favorite brands although they may make a different product close to what I posted.
The one I posted is my recommendation.
 
staceyneil said:
Thank you!

Would something like this work?


Little Giant Sewage Pump System
4/10 HP sewage pump, 80gpm @ 5'
little-giant-9s-smpx-lg-simplex-package-system-509109-a.jpg
Click to expand...

You do realize that you may have to put that pump in the concrete, you can get a pump that installs on the laundry tray that would suit your situation
 
That pump system would be like using a cannot to kill flies. They make package units specifically for use under, or next to, a sink which are a lot smaller than the one you gave us a picture of.
 
hj said:
That pump system would be like using a cannot to kill flies. They make package units specifically for use under, or next to, a sink which are a lot smaller than the one you gave us a picture of.
Click to expand...

The unit I linked above is one such unit and is probably available at a local plumbing supply house near you. It is also a large enough unit which should easily handle the flow of a washing machine tied directly into it without water backing up into the sink. Most plumbing codes in the US specify a minimum drain size of 2" pipe for a washing machine drain.
 
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Thanks, guys! Yes, it certainly would be easier not to have to jackhammer the concrete floor :)
I am going to see if I can get one of the ones you recommended locally. Thanks a lot!
STacey
 
The 404 model could be used but then you will have to have the washing machine discharge into the sink.
 
Shellback

I have had one of these on my laundry tub for 26 years and it still is running strong. Very simple connection to the bottom of the laundry tub and then pvc pipe with a backflow valve to the sewer line. I do pickup an air vent on the way to the sewer line buy always wondered if this was needed.

http://www.shellbackpumps.com/
 
Interesting... but I could not find them for sale anyplace on line to check pricing!

In any case, you guys have given me some great ideas, thank you. Now I just have to finish the major bathroom renovation and find time for yet another project! (DH isn't the one having to try to wash dirty mortar tools with a frozen outdoor hose, so he doesn't know how necessary this thing is, but he's the one who'll have to install it and he's very tired & overworked!)
 
Mine along with the wash machine drains into the floor drain. Has been that way since we moved in, and probably for the last 50 or so years for this house. Only recently, did we use 1 1/2" PVC for the drain line, since all that it was for us, as a 3/4" rubber hose for both.
 
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