pressure drainfield system

[arabojan]

I am designing a pressure drainfield system, and my system performance curve is as follows:

gpm head
40 32.27
45 37.03
50 42.28

I have a hard time to select a pump to fit in my system; I tried Myers and Haydromatic Companies products.
I need a non-clog pump, the grinder pump from the companies mentioned above works but because the requirements need to have a 18 inch dead space for sludge at the pump chamber I have to raise 18 inch the pump plus a clearance for bottom of the pump so my turn off float switch will raise too much. do you know any company or any solution for this problem.

 

[Spartan5]

I would suggest a Biotube Pump Vault

http://www.orenco.com/eps/eps_pumpvault.cfm

and a high head effluent pump

http://www.orenco.com/eps/eps_pump.cfm

The pump vault is suspended from the top of the chamber and contains the pump and floats. The inlets of the pump vault can be located above the 18" minimum required for sludge collection.

The pump vault has 1/8" filtration prior to the effluent being pumped to the drainfield. This allows you to go as small as 1/8" orifices in the distribution laterals. This results in lowering the GPM requirements of the pump to the 10-20 GPM range for a typical drainfield and a smaller pump. If you are using orifices larger than that I'd be surprised if you are getting equal (within 10%) distribution. That is the primary reason for pressure distribution.

If you place a non-clog pump in the bottom of the tank and someone fails to maintain the tank, that pump will pump the drainfield full of solids. With the Biotube Pump Vault system, if someone fails to maintain the tank, the filter will gradually clog. This will result in intermittent low water alarms (the water level in the vault drops faster than water can flow into it) which provides notification that maintenance is required.

 

[arabojan]

thanks Sparttan5, it was very helpful