Choosing a Water Pump

 
 
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 Water Pump Characteristics
.
Type of PumpAdvantagesDisadvantagesApplications
Shallow Well JetCan be offset from the wellEfficiency decreases as total suction lift increasesTotal suction lift less than 6m
(20 ft.)
Can be adapted to wells of various yieldsEasily damaged by sandCommonly used on dugouts*
Requires little maintenanceGas locks easily
Inexpensive
Deep Well JetCan be offset from the wellEfficiency decreases as total suction lift increasesPractical for less than 25m (80 ft.) total suction lift
Can be adapted to wells of various depths and yieldsEasily damaged by sandUsed in dugouts in combination with dugout-side well
Requires little maintenanceGas locks easily
Inexpensive
SubmersibleVery efficientEasily damaged by sandDepth not normally a limiting factor
High capacityGas locks occasionallyUsed in dugouts in combination with dugout-side well
Capable of pumping water from great depthMinimum well diameter 100 mm (4 in.)
Requires little maintenance
Inexpensive
Piston (Shallow and Deep Well)Deep well pumps are more tolerant of sand than other pumpsPump service can be costlyShallow well; total suction lift less than 6m (20 ft.); commonly used on dugouts
Can pump water containing dissolved gasesLow dischargeDeep well: depth not normally a limiting factor
Constant rate dischargeExpensive
Suitable for small diameter wellsDeep well pumps cannot be offset from the well
.
Daily Water Requirements
Human
225 - 450 L
50 - 100 gal
Beef Cattle
25 - 75 L
5 - 17 gal
Hog
10 - 20 L
2 - 5 gal
100 Turkeys
40 - 60 L
9 - 13 gal
Dairy Cow
35 - 110 L
8 - 24 gal
Horse
30 - 45 L
7 - 10 gal
Sheep
5 - 20 L
1 - 4 gal
100 Chickens
20 - 30 L
5 - 7 gal
.
Optimum Pumping Rate (L/min) or (gal./min)
= Water volume required per day
...Minutes of pump time per day
.
e.g. 960 gal/day = 4 gal/min
e.g. 240 min/day
.
Well yield
When the farm well is unable ot yield sufficient water to meet the optimum pumping rate, the pump should be chosen to match the well yield. Peak water demand is met by providing one or two large pressure tanks for water storage. Very low well yields (less that 10 L/min. or 2 gal/min.) usually require a cistern for intermediate storage and a second pump.

Well diameter
Wells larger that 100mm (4 in.) in diameter can accommodate most farm water pumps. Wells less that 100 mm (4 in.) in diameter limit the type of pump that can be installed. Normally, deep well piston pumps or specifically designed jet systems are used.

Depths and distances
Other factors to consider are:
  • Depth to pumping water level
  • Distance between pump and well (for shallow well pumps and deep well jet pumps)
  • Distance between pump and final outlet point
  • Height difference between well and outlets
Available power
Most farm water pumps are available with either 115 volt or 230 volt single phase motors. Normally, a pump will operate more efficiently and consume less power with a 230 volt motor. Larger pumps require three phase motors.

For more information contact an Agricultural Water Specialist with Alberta Agriculture, Food and Rural Development at the following locations and phone numbers:

Lethbridge (403) 381-5846
Red Deer (403) 340-5324
Grande Prairie (780) 538-5606
Edmonton (780) 422-5000

Information Required for Sizing a Water Pump

Complete this table if you are purchasing a new water pump. The pump supplier can use this information to provide the correct pump for your situation.

Name____________________________________________________________________________
.
Address_________________________________Phone__________________________________
.
Water pump required for:Well ________
Dugout______
Cistern______
Other_______
.
Intended ApplicationHouse______
Barn________
Feedlot_____
Irrigation____
Other_______
.
Optimum Pumping Rate_____L/min _____or gal/min
.
Well Depth____________
.
Pumping Water Level____________
.
Well Diameter____________
.
Well Yield_____L/min _____or gal/min
.
Dugout:Length_____ Width_____ Depth_____ ..... _____m or ft.
.
Distance between pump and well or pump and dugout (Shallow well pumps and deep well jet pumps only)_____m _____or ft.
.
Distance between pump location and final outlet point_____m _____or ft.
.
Height difference between well or dugout and outlets_____m _____or ft.

Source: Agdex 716(C10). Revised February 1993.
 
 
 
 
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This information published to the web on February 1, 1993.