H74 Chart

How much water can I get with my
4" High Lifter water pump?

Typical domestic water application using tank for reservoir and for pressure to house.

High Lifter H74

Typical garden/irrigation application using both pumped water and discharged water.
(Tanks not necessary.)

Do a site survey

1. Determine the height of the tank above your source (net lift)=_____________ft.

2. Next determine the drop from the water source to the pump (fall)=____________ft.
(Typical methods to estimate LIFT or FALL are: topographical maps, a friend with a tape measure, a hand held sight level, an altimeter, or a tube and a water pressure gauge. 1 psi = 2.3')

3. Measure or estimate the flow at the source =_________gallons per minute. (Use a gallon container and a watch.)

4. Determine the amount of water required delivery =____________gallons per day.

Performance Chart for H74

To determine water delivery using chart:

DETERMINE WORKING RATIO
Divide Lift or Output Pressure
by Fall or Inlet Pressure

Note: 1 psi = 2.3 foot lift or fall

Inlet Pressure: 50 psi
(115-foot fall)
Output Pressure: 150 psi
(345-foot total lift)
Working Ratio = 3:1

EXPRESS WORKING RATIO AS
A PERCENTAGE OF PUMP RATIO.
Select a pump ratio.
Divide Working Ratio by Pump Ratio.

Try 4:1
3 ÷ 4 = 75%

SEE CHART- project a horizontal
line from the Working Ratio percentage
to appropriate Inlet Pressure curve.
From this intersection, project a
vertical line down to Inlet Flow.

Inlet Flow
68 gpm

CALCULATE OUTPUT FLOW:
Divide Inlet Flow by Pump Ratio

68 gpm ÷ 4 = 17 gpm