Under-sink ejector VS. jackhammer to existing ejector


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Old 03-12-08, 12:04 PM
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Under-sink ejector VS. jackhammer to existing ejector

I am finishing my basement and addiding a full bath and also a wet-bar sink. The full bath is roughed-in and connected to an adjacent ejector pump; no issues here.

The wet-bar sink will be 20 feet away in another room. I am leaning on installing an under-sink ejector for this instead of tearing up the concrete floor and running a drain to the bathroom ejector. The path to the ejector goes under structural 2x6 framing so I would also have to deal with that.

What are some experienced opinions about this, or are there other things I should consider? How well do the under-sink pump systems work? I don't see a tremdous amount of information about them on the web.

Thanks for any info and let me know if you need more examples.

plex4r
 
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Old 03-12-08, 04:59 PM
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The under sink ejector is basically a pump in a 5gal. bucket. It has an inlet, a discharge and a vent opening. You run your sink into the inlet and the discharge to your other ejector. The problem is sometimes the vent. It really should be vented. Sometimes you can use a mechanical vent but they are not always allowed. If you do use a mechanical vent don't use a pump with a pressure switch as it will not work properly. Little Giant sells one called the Drainosaur. The WRS-6 is the one we sell the most of. You can find the full line on Little Giants website under wastewater-sump-sump water removal systems. They have a couple of different sizes of basins and pumps. They seem to work well for just your type of application.
 
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Old 03-13-08, 10:30 AM
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pumpguy, I saw the devices you mentioned and I agree they look like they would work. I have two followup questions:

1. Should the vent be a problem for me? Couldn't I just run a PVC vent up the 2x6 wall behind the sink and across to the vent stack the bathroom is connected to?

2. The main drain 4" pipe for the house runs along the ceiling of the basement, close to where the undersink ejector would be. It is actually closer than the main ejector for the bathroom. Couldn't I just cut in, add a 2" to 4" T, and connect the undersink ejector to this?

Thanks!
 
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Old 03-13-08, 04:17 PM
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I'm not a plumber but I think that would work fine the way you described doing it. You might want to use a "silent" check valve on the discharge so you don't get the clunk when the pump shuts off. Good luck
 
 

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