grinder pump station alternative 1

[Surcharged]

I am designing a conv. store. We need to pump the sewage. We need 20 gpm at 30' of head. Due to low flows we need to use a 2" pipe which dictates the use of a grinder pump station. Preliminary cost estimate for a pre-packaged Flyght system is around 25K. Do I have any alternatives? this seems to be high for a convenience store.

 

[PEDARRIN2]

That does sound high for what would be domestic sewage.

I cannot speak for what you have to do outside but if I was designing for the inside sewer, 25K is high.

For a duplex system that handles normal sewage flows, I would not expect to pay more than about $5K for the system.

I typically use Zoeller prepackaged pump systems.

Try them.

 

[bimr]

I agree with PEDARRIN2. This project is probably too small for a product from Flyght. Flyght usually supplies much larger pumps.

 

[Surcharged]

A pump salesman has suggested a STEP type system. Septic tank to catch solids with effluent pump in a pump tank. Owner likes this idea since he is a short term owner and will not have to pay tank pump out costs.

 

[Watthour]

Myers or Zoeller are good alternatives. Myers might not be quite equal to Zoeller, but in a duplex system with such a low demand, either would probably last quite a while. I have also successfully used Ebara pumps, but I'm not sure if they're even around any more.

 

[bimr]

In regards to the "STEP type system". The Step type system will be more expensive on initial costs than just installing a grinder pump.

The local building department would have to approve the installation of the setp system as well.

 

[Surcharged]

initial pricing on grinder station - 12000. This was also confirmed with another company.

Step system - around 6000

 

[semo]

You're right, the flygt is too big for this application and I light Flygt pumps.

The Myers is a good system (used many of them); however, make sure you use a 2hp motor. There are a lot of 1hp units and they look fine for the pump curve; but, they tend to burn out early due to the grinding needs. The 2hp units have a little more power for the grinding application.

Why do you need a duplex unit? Use a simplex and purchase a spare pump.

I just personally purchased a simplex station for our church with a Myers pump, guide rail installation, all of the wetwell piping, valves, controls, and 8'x30" fiberglass wetwell for $3,500. That doesn't include power to the panel, wiring between the panel and pump, or inlet/discharge piping; but, your above prices are way out of line for even that if it is close to your building.

A "quality" step system will use the same setup only a pump without the grinders so the cost will be similar except you also have a septic tank and routine sludge removal. You can get the cheap step systems with a submersible well pump; but, I think you will regret it once you begin replacing the pumps.