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Pearl Thor15 Irrigation Pump vs Flotec 1.5 HP Cast Iron Sprinkler Pump

Buy the Pearl Thor15 if you need pressure, not just volume. It holds 35-40 psi at 40-60 GPM and is rated to 125 psi working pressure, so it can feed a pressure tank, a booster setup or a long irrigation zone. The Flotec is a lawn sprinkler pump: 45 GPM at 30 psi, 47 psi maximum, and it is happiest moving water at low head. Both are 1.5 HP self-priming centrifugal pumps with 1-1/2" NPT ports and 25 ft maximum suction lift. Owners of this class of pump care about the seal and the priming plug; the Pearl's higher pressure ceiling and dual voltage give it more headroom, while the Flotec's fiberglass-reinforced thermoplastic body resists corrosion in damp yard installs.

  • Choose the Pearl Thor15 if you need 35-40 psi at 40-60 GPM for pressure boosting, a pressure tank or a multi-zone irrigation system, or if you only have 115V available.
  • Choose the Flotec if you are watering a lawn or running fountains and waterfalls at low head, and 230V is already at the pump location.

Prices

  • Pearl Thor15 Irrigation Pump: $555.00 at eBay (checked today)
  • Flotec 1.5 HP Cast Iron Sprinkler Pump: $366.22 at McCoy's Building Supply (checked today)
  • Difference: the Flotec 1.5 HP Cast Iron Sprinkler Pump is $188.78 cheaper than the Pearl Thor15 Irrigation Pump today
Pearl
Pearl Thor15 Centrifugal Irrigation Pump - 1.5 HP - 115 / 230V

Pearl Thor15 Irrigation Pump

Pearl Thor15 Centrifugal Irrigation Pump - 1.5 HP - 115 / 230V

4.8(1 rating)
$555.00at eBayChecked 16 h ago
See all prices and details
Visit eBay

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Pros
  • Holds 35-40 psi at 40-60 GPM, enough for a pressure tank or long zones
  • 125 psi maximum working pressure leaves headroom for boosting
  • Runs on 115V or 230V, so it fits either circuit
  • Handles water up to 150 °F
  • Standard 56J motor frame is easy to source a replacement for
Cons
  • Cast iron body needs draining before a hard freeze
  • Draws 21 A at 115V, which needs a 25-30 A circuit
  • More pump than a simple lawn sprinkler setup needs
Flotec
Flotec 1.5 HP Cast Iron Sprinkler Pump

Flotec 1.5 HP Cast Iron Sprinkler Pump

2.2(5 ratings)
$366.22at McCoy's Building SupplyChecked 1 h ago
See all prices and details
Visit McCoy's Building Supply
Pros
  • 67 GPM maximum flow moves a lot of water at low head
  • Corrosion-resistant thermoplastic body suits damp outdoor installs
  • 9.6 A at 230V is easy on a 15 A breaker
  • Simple sprinkler-pump design with few controls to set
Cons
  • 47 psi maximum pressure is too low for most pressure-tank boosting
  • 230V wiring is the practical choice; 115V pulls 19.2 A
  • 140 °F water limit
  • Not built for continuous high-pressure duty

What separates them

Pearl Thor15 Irrigation PumpFlotec 1.5 HP Cast Iron Sprinkler Pump
Best operating point40-60 GPM at 35-40 psi (80-100 ft TDH)45 GPM at 30 psi, 10 ft lift
Maximum pressure125 psi working pressure47 psi
Voltage115V or 230V, 21/10.5 A230V or 115V, 9.6/19.2 A
Maximum flowAbout 60 GPM in its best range67 GPM maximum
Body materialCast iron pump bodyFiberglass-reinforced thermoplastic, corrosion resistant
Maximum water temperature150 °F140 °F
Intended useBooster, recirculation, water supply, irrigationLawn sprinkling, fountains, waterfalls, light boosting
Suction lift25 ft25 ft

Price history

$555.00$348.95
Nov 2Nov 10
  • Pearl Thor15 Irrigation Pump: lowest $555.00 on Nov 2 at eBay; $555.00 on Nov 9.
  • Flotec 1.5 HP Cast Iron Sprinkler Pump: lowest $348.95 on Nov 10 at Amazon.

Prices at every store

Pearl Thor15 Irrigation Pump

  • eBayNew

    In stock

    $555.00Free shippingChecked 16 h ago
    Visit eBay
  • DK HardwareNew

    In stock

    $826.84+ $50.47 shippingChecked 16 h ago
    Visit DK Hardware
  • Supreme Water SalesNew

    In stockReturn policy

    $1,174.56Checked 48 min ago
    Visit Supreme Water Sales

Store links may earn us a commission.

All 3 stores and price history →

Flotec 1.5 HP Cast Iron Sprinkler Pump

  • McCoy's Building SupplyNew

    Availability unknown

    $366.22Checked 1 h ago
    Visit McCoy's Building Supply
  • ZoroNew

    Availability unknown

    $461.99Checked 1 h ago
    Visit Zoro

Also available at

  • Grainger Industrial SupplyCheck price at Grainger Industrial Supply
  • WalmartCheck price at Walmart
  • WalmartCheck price at Walmart
All 2 stores and price history →

Specs compared

SpecPearl Thor15 Irrigation PumpFlotec 1.5 HP Cast Iron Sprinkler Pump
UseBooster—
Horsepower1.50 HP—
Voltage115 / 230 V—
Inlet Connection1-1/2" FNPT—
Outlet Connection1-1/2" FNPT—
Optimum Flow Rate40 to 60 GPM—
Optimum Pressure Range35 to 40 psi—
Maximum Working Pressure125 PSI—
Liquid Temperature32 °F - 150 °F—
Maximum Suction Lift25 ft—
Maximum Ambient Temperature104 °F—
Motor Frame56J—
Show all 40 specsShow fewer specs
SpecPearl Thor15 Irrigation PumpFlotec 1.5 HP Cast Iron Sprinkler Pump
Amperage Rating21/10.5 A—
Pump Type—Sprinkler Pump
Product Type—Sprinkler Pump
Flow Rate Pressure—45 GPM (at 10' lift and 30 PSI)
Maximum Flow Rate—67 GPM
Maximum Head—30'-40'
Maximum Pressure—47 psi
Operating Pressure—30 PSI (at 10' lift and 45 GPM flow)
Application Use—Sprinkler Pump

Questions and answers

Which pump is better for pressure boosting a house?
The Pearl Thor15. It holds 35-40 psi at 40-60 GPM and is rated to 125 psi, which is what a pressure tank and switch setup needs. The Flotec tops out at 47 psi and is meant for sprinkling.
Which one moves more water for a lawn?
The Flotec, on paper. It peaks at 67 GPM and delivers 45 GPM at 30 psi. The Pearl's best range is 40-60 GPM, but it does that at higher pressure, which matters if your zones are long or uphill.
Can I run either on 115V?
Yes, both are dual voltage. The Pearl draws 21 A at 115V and the Flotec 19.2 A, so either needs a dedicated 25-30 A circuit at 115V. At 230V the Pearl draws 10.5 A and the Flotec 9.6 A.
Which lasts longer?
Neither maker publishes a service life. The Pearl's cast iron body and standard 56J motor frame make repairs and motor swaps easier. The Flotec's thermoplastic body will not rust, but it is a lighter-duty sprinkler pump. In both, the shaft seal is the part that fails first.
Is the Pearl worth stepping up to?
Yes if you need pressure above 47 psi, 150 °F water or a repairable motor frame. No if you are only watering a lawn at low head, where the Flotec's higher peak flow does the job.
Do either of these self-prime?
Both are self-priming centrifugal pumps with 1-1/2" NPT suction and discharge and a 25 ft maximum suction lift. Keep the suction line short and airtight, and fit a foot valve.

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  • Pearl Thor15 Centrifugal Irrigation Pump - 1.5 HP - 115 / 230V vs AQUASTRONG 1.5 HP Centrifugal/Jet Pump, 4250 GPH, 115/230V, Durable Cast Iron Pump for Lawn Sprinkler and Irrigation

Buying guides that pick them

  • Best 1.5 hp irrigation pumps
System Application
—
Irrigation system
Intended Use—Irrigation
Recommended Application—Lawn watering
Discharge Size—1-1/2" NPT
Intake Size—1-1/2" NPT
Max Pumping Depth—25' (Max lift)
Power Horsepower—1-1/2 HP
Power Source—Electric
Power Voltage—230 V
Power Amperage—9.6 amps (full load on 230v)
Dimensions Size—No information
Dimensions Depth—21.8125 in
Dimensions Diameter—1-1/2 in
Dimensions Height—13.125 in
Dimensions Length—21.813 in
Pump Subtype—Transfer Pump
Pump Style—Booster
Pump Mechanism—Centrifugal
Suitable Environment—Not Submersible