# How to determine appropriate wter pump

1. Jan 14, 2009

### jmikl

A constant volume of 1800 cf of water needs to be introduced into the base of a 60 ft tall (15x15) water tank. I need to determine the hp/kw needed in order to do this. Can anyone explain the math on determining this?

Thx

Jeff

2. Jan 14, 2009

### Topher925

If the volume of water is constant, whats the pump for?

3. Jan 14, 2009

### jmikl

continuous flow, costant flow.

4. Jan 14, 2009

### Strugglin Man

You need the flow in, say, gallons per minute, cf per hour, or lbs per hour,,,,,,,,

amount of water / amount of time

after that it's straightforward.

Good Luck

5. Jan 14, 2009

### jmikl

cubic feet per minute flow

Thx

6. Jan 14, 2009

### Staff: Mentor

Static pressure times flow rate = power. Divide by pump efficiency to get motor power.

7. Jan 14, 2009

### jmikl

Static pressure times flow rate = power. Divide by pump efficiency to get motor power.

Thx Russ. I am still not sure how to calculate it.

25.92 (water pressure at 80 ft) xxxx gpm ?

jeff

8. Jan 15, 2009

### Strugglin Man

jm,

Hydrualic HP = lbs of liquid per minute x head (in feet) / 33,000

Pump HP = Hyd HP/Pump Efficiency

After you work this out, call your trusted pump vendor/mnfr, and work out w them the most logical pump to purchase based on your specific needs/ conditions.