Goulds GT20, IRRI-GATOR Self-Priming Centrifugal Pump, 86 GPM, 2 HP, 230 Volts, 1 Phase, 1-1/2" NPT Suction, 1-1/2" NPT Discharge

SKU #: GT20
Brand: Goulds
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Goulds GT Irrigator Self Priming Centrifugal Pump

This GT centrifugal pump, capable of repriming up to 25 feet suction lift, is engineered with a back pull out design that allows for easy service,


  • Self-priming design - once pump is initially primed, filled with water, it will reprime when the water level rises above the end of the suction pipe
  • Back pullout design allows disassembly of pump for service without disturbing piping
  • Two compartment motor for easy access to motor wiring and replaceable components
  • Bolt down diffuser (guidevane) provides positive alignment with impeller. F.D.A. compliant, injection molded, glass filled Lexan for durability and abrasion resistance
  • Corrosion and abrasion resistant, glass filled Noryl impeller, F.D.A. compliant
  • Electro-coat paint process is applied inside and out, then baked on for corrosion resistance
  • Cast iron casing, 4-bolt, back pull-out design. Openings for vacuum gauge and casing drain
  • Powered for continuous operation
  • Rated within the motor manufacturer’s recommended working limits
  • Can be operated continuously without damage
  • Mechanical seal with carbon/ceramic faces, BUNA elastomers. 300 series stainless steel metal parts
  • Diaphragm prevents the seal from running dry
  • NEMA standard open drip proof motor
  • Stainless steel shaft
  • Built-in overload with automatic reset


  • Lawn sprinkling
  • Irrigation
  • Air conditioning systems
  • Heat pumps
  • Water transfer
  • De-watering
Mfg. NumberGT20
SeriesGT Irri-gator
Product TypeCentrifugal Pump
ApplicationResidential water systems
Horsepower2 HP
Voltage230 Volts
Frequency60 Hz
Speed3500 rpm
Suction Connection1-1/2" NPT
Flow at 5 ft (20 psi)86 gpm
Flow at 10 ft (20 psi)77 gpm
Flow at 15 ft (20 psi)70 gpm
Flow at 20 ft (20 psi)59 gpm
Pump CasingCast iron
Flow at 25 ft (20 psi)46 gpm
Impeller MaterialGlass filled noryl
Discharge Connection1-1/2" NPT
Maximum Flow88 gpm
Maximum Head126 ft
Maximum Water Temperature140°F
Thermal ProtectionYes

The Goulds GT Irri-Gator series of self-priming centrifugal pumps is built for dependability, efficiency, and easy maintenance.  In addition to lawn sprinkling, Irri-Gator pumps can be used for irrigation, air conditioning and heating systems, water transfer and dewatering applications. Discharges for this series are 1-1/2" NPT in size.

The Goulds GT series is constructed with solid cast iron frame. In addition, an “electro-coat” paint finish is applied to both the interior and exterior of the pump housing. Electro-coating simply uses electrical current to deposit the paint finish on the item, which is then baked in a curing oven. The process reinforces the casing for corrosion and abrasion resistance.

The impeller is a FDA-compliant, glass-filled Noryl impeller which is also corrosion resistant. Since the pump could be exposed to corrosive elements such as wind, rain, dirt and groundwater, corrosion-resistance is especially important. Thus, the Goulds GT series is perhaps the most reliable irrigation pump option for years of continued good service.

Self-Priming The Goulds GT series is built with a centrifugal self-priming design. Once the initial priming is performed, the pumps will reprime once the water level rises above the level of the suction pipe. The self-priming action makes it a convenient pump for lawn sprinkler systems designed to operate at certain pre-timed intervals. The pumps are also powered for continuous use off of the self-priming action. They can reach up to 25 ft. of suction lift after repriming.

Easy ServiceabilityA back pullout design allows for the ‘back end’ of the pump to be separated from the ‘wet end,’ which remains attached to the piping. Certain back end components, such as seals and bearings can thus be easily removed from the pump. This is of great convenience if a specific part needs to be cleaned, serviced or replaced but you don’t want to detach the wet end from your piping. The motor casing is also constructed with a two compartment design for easy access to the motor wiring. You can maintain parts of the pump when they need to be maintained without disrupting the whole of your system. Customers are more likely to take proper care of the pump and perform preventive maintenance because of the convenience of the back pullout design. And preventive maintenance is the best way to ensure consistent performance over the life of the pump.


Model Comparison Chart

Model Discharge (NPT) HP Voltage Phase GPM Max. Head
GT07 1-1/2" 3/4 115/230 1 46 109'
GT10 1-1/2" 1 115/230 1 60 118'
GT15 1-1/2" 1-1/2 115/230 1 64 121'
GT073 1-1/2" 3/4 230/460 3 46 109'
GT103 1-1/2" 1 230/460 3 60 118'
GT153 1-1/2" 1-1/2 230/460 3 64 121'
GT20 1-1/2" 2 230 1 88 126'
GT203 1-1/2" 2 230/460 3 88 126'
GT30 1-1/2" 3 230 1 110 128'
GT303 1-1/2" 3 230/460 3 110 128'




Goulds GT Irrigator Series Centrifugal Pump Brochure
Goulds GT Irrigator Series Centrifugal Pump Instructions
Goulds GT Irrigator Series Centrifugal Pump Repair Parts

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