Residential grinder pump system questions
Residential grinder pump system questions
(OP)
Hello all.
I found a bit of info doing a search here, but I have a few more questions. I am a consulting engineer. usually do commercial, but i got this job to provide an ejector for a residential 1-family house.
1. is a duplex gringer overkill? should i just do a simplex?
2. whats the usual sizing for these? #bathrooms? sqft of house? # of people?
3. any preferred manufacturer's?
any tips on sizing and spec'ing would be great!
thanks all.
ken
I found a bit of info doing a search here, but I have a few more questions. I am a consulting engineer. usually do commercial, but i got this job to provide an ejector for a residential 1-family house.
1. is a duplex gringer overkill? should i just do a simplex?
2. whats the usual sizing for these? #bathrooms? sqft of house? # of people?
3. any preferred manufacturer's?
any tips on sizing and spec'ing would be great!
thanks all.
ken





RE: Residential grinder pump system questions
The only experience I have with individual home pumps was for a STEP system. We used Orenco Systems' pumps, but not their tanks (used a local supplier). It probably doesn't apply to your project, but they do have an informative website and they sent me a wealth of information (which I left behind at my old company when I went back to school).
RE: Residential grinder pump system questions
RE: Residential grinder pump system questions
2. These pumps generally do not run all the time, so the sizing is not really accurate. The pumps generally operate at 5-45 gpm, depending on the discharge head that you have to pump against. Unless you have some extreme discharge head condition, you will probably see 40-45 gpm pumping capacity.
If you go to Zoeller.com, they have a sizing program. You can size by the house method or by the fixture method.
Unless you have an very large house, go with the standard simplex pump package. You can double check the size of the sewage pump against the capacity of the water line into the house.
3. There are numerous vendors of these small pumps.
RE: Residential grinder pump system questions
Hydromatic and Goulds are common & reputable US manufacturers.
Engineering is the practice of the art of science - Steve
RE: Residential grinder pump system questions
I thought a duplex was a bit much. My boss put a duplex in the proposal and i'm trying to convince him its not necessary.
I saw on another thread the e-one pumps are pretty popular. any good?
I will check the other brands mentioned above. I've used goulds before.
RE: Residential grinder pump system questions
Many suppliers utilize a 1/2 HP as standard and these motors can be under a load because they not only drive the impeller; but, they also drive the cutters.
We've seen better lifespans with the larger motor and most manufacturer's can supply a 1 hp motor.
RE: Residential grinder pump system questions
RE: Residential grinder pump system questions
For grinder pumps, it seems as though they only have a 2hp model. (the 820 or 840).
I selected this pump with the panel, basin, etc to make a complete package system.
Zoeller has a nice website! selection progtam, details, specs, cad details... very nice.
RE: Residential grinder pump system questions
RE: Residential grinder pump system questions
Some of my clients have selected E-One over grinder. A little more expensived up front, but reportedly more reliable. Agree w/ Hackenthorpe that you MUST have LOCAL SERVICE as priority.
RE: Residential grinder pump system questions
http://www.femyers.com/index.html