Small Diameter Forcemain with Ancillary Connection Points
Small Diameter Forcemain with Ancillary Connection Points
(OP)
I am preparing a small study for integrating 3 outlying structures on septic systems on a property.
I plan on installing a small package sewer pump station... type Zoeller, E/One, etc. with a 1" or 2" force main. Estimated daily flow is only about 800gpd at this low point.
Along the way to the gravity sewer I would like to be able to add a couple other fixtures from a guardhouse and warehouse where daily flow is estimated to be about 50gpd each.
-Is there a simple way to do this?
-A simple wye fitting with backflow preventer that would allow a holding tank to drain into the forcemain when the pump isn't on?
-Or would the ancilliary structures need to have their own pumps as well?
Thank you for your thoughts
I plan on installing a small package sewer pump station... type Zoeller, E/One, etc. with a 1" or 2" force main. Estimated daily flow is only about 800gpd at this low point.
Along the way to the gravity sewer I would like to be able to add a couple other fixtures from a guardhouse and warehouse where daily flow is estimated to be about 50gpd each.
-Is there a simple way to do this?
-A simple wye fitting with backflow preventer that would allow a holding tank to drain into the forcemain when the pump isn't on?
-Or would the ancilliary structures need to have their own pumps as well?
Thank you for your thoughts





RE: Small Diameter Forcemain with Ancillary Connection Points
RE: Small Diameter Forcemain with Ancillary Connection Points
RE: Small Diameter Forcemain with Ancillary Connection Points
RE: Small Diameter Forcemain with Ancillary Connection Points
Regarding elevation, the force main will rise up about 50 static feet (realize need to account for friction also, just not to that point of detailed calcs yet). The two extra points that I would like to connect are near the top of the top of the run, say, 40-45'. So, even accounting for them being maybe 3' above the force main, they certainly wouldn't be to gravity flow to the force main while that pump was on.
I really think that I will need to put a pump at each point, just wanted to bounce this off someone else.
Regarding the statement of Orenco... wouldn't this just be a local distributor you were talking to or is it a bad impression left by national sales staff.
Thanks all.
RE: Small Diameter Forcemain with Ancillary Connection Points
I don't like orenco products because they are unreliable, often unnecessary and always over priced. If you want to work with them they ask that you do only one thing....don't think. Don't think about their products,designs,concepts. Just become one of the orenclones and accept without question. I cannot do that. But, obviously, may can and do.
RE: Small Diameter Forcemain with Ancillary Connection Points
ht
More or less the same thing.
Each house would have a positive displacement type grinder pump. Each pump has a fixed common discharge pressure to ensure positive dicharge from each house at all times.
Here a link to some technical papers that explain the setup:
http://ww
RE: Small Diameter Forcemain with Ancillary Connection Points
You will gain valuable experience, make some friends in the supply industry and generate good will.
RE: Small Diameter Forcemain with Ancillary Connection Points
www.jhwright.com
RE: Small Diameter Forcemain with Ancillary Connection Points
RE: Small Diameter Forcemain with Ancillary Connection Points
If you are discharging to a conventional treatment facility, grinder pumps (e.g. E/One) would be fine. Each building would require its own pump unless you could get gravity flow from the buildings to common areas where you would locate the pump basins.
If discharging to a conventional gravity sewer, hydrogen sulfide production and the related corrosion might be a concern.
STEP systems such as those supplied by Orenco are different than E/One systems. While they are both low pressure sewer systems, the E/One grinds the solids and conveys them to the treatment facility while a STEP system retains the solids in a septic tank and conveys only the wastewater to the treatment facility (Septic Tank Effluent Pump).
As far as Orenco equipment is concerned, I have not seen a filtered pump vault for use in STEP systems comparable to theirs in both function and maintainability. The same can be said for their onsite treatment equipment. Their pumps are very robust as well. The only thing I have had any concern with is the robustness and necessity of some of the STEP control systems.