[nibs75]

I'm attaching a pic of what I have thought about trying to do in order to put a wet bar in my basement. Is any of this possible. Does the little giant pump work?

I would connect small, probably not used regularly, bar sink to pump. Pump outlet is 1 1/2". Out of pump to wall, 90* 1 1/2" check valve in vertical pipe. Then expand to 2". Climb above the ceiling height, between the floor joists in and run at 1/4" per 1' slope until it comes parallel with existing horizontal drain from main floor kitchen above. I would then tie into the horizontal drain from above with a wye.

If that is possible...

I need to vent the pump. It says, "use of a mechanical vent will cause improper operation of the automatic switch". So I don't think I can use an AAV. Do I have to tear out a section of upstairs wall in order to vent all the way out roof? Can I somehow tie back into the drain from above since it is vented??

I appreciate any advice or opinions..

[nibs75]

I could attach to the vent for the basement bathroom, but would have to run about 25-30 ft horizontal run across the basement.. is that allowed? The ceiling is not finished yet, so I have access.

[Milo Dolezal]

Yes, you can run vent horizontally as long as it has 1/4" per foot up-slope.

[nibs75]

Thanks for the info. I found a site on AAVs and it shows an example of one connected to an ejector pump.

http://www.studor.com/DesignCriteria.pdf

Can I do this? Will it work but is not as good, or will it simply not work at all?

[Milo Dolezal]

You cannot use AAV vent in Sewer Ejectors because AAV is One Way Vent.

Yes, AAV will allow air "in" to replace mass of pumped out matter. But, also, Sewer Ejector must have a vent that will allow sewer gases / vapor to rise upward towards the roof and away from the pit. This is accomplished by installing dedicated gravity vent that terminates above the roof.

[nibs75]

Is a drainosaur considered a sewer ejector? Are all sump pumps sewer ejectors?

From the drawing I have above since the drain from the pump is connected to a drain that is vented above it, does this give me any leeway?

Can I vent out the side under a deck so it is not seen? Would it then stink if you were sitting on the deck? Again, this pump would be for a small wet bar sink only.

Thanks again for all of you advice.. as you can tell, I'm not a plumber. :) I just want to understand what I can do, what can be done but isn't suggested, and what plain don't work.

[Milo Dolezal]

Sump Pump and Sewer Ejector Pump are two different pumps.

Sump Pump pumps clean water and its collection area doesn't require vent.

Sewer Ejector is a pump that pumps liquids and solids up to certain size. It is located inside enclosed, air-tight collection area (pit or bucket) and requires vent to vent out sewer gases. It is air-tight because it is bio-hazard. Gases from Sewer Ejector, if not vented, may explode.

[nibs75]

I am referring to a gray water pump.

Little Giant WRSC-6 Compact 'Drainosaur®' Utility Drain Pump (506065)

In the specs it says a AAV is not recommended, but they know many use them. So that is why I asked if the pump still works with one.