What Size Pump for Sprinkler System? A Complete Guide for 2026

The Flotec 1-1/2 HP Thermoplastic Sprinkler Pump is a powerful, self-priming option for homeowners and light commercial users who need reliable irrigation. It moves up to 4,020 gallons per hour and can handle systems with up to 30 sprinkler heads, making it well suited for medium to large lawns.

Performance is backed by a rugged fiberglass-reinforced thermoplastic housing that resists corrosion and wear. The self-priming design means you only need to fill the pump housing once during setup, after which it can draw water from depths up to 20 feet. A customer review notes that the pump delivers about 25 gallons per minute from a pond 125 feet away, which is plenty for two sprinklers.

The pump operates on either 115V or 230V, giving you flexibility to connect it to your current electrical supply. Its 1-1/2 inch discharge connection is standard for sprinkler systems, and the pump is built to handle water temperatures from 35°F to 140°F. The included manual is detailed, making installation straightforward even when replacing an older unit.

There are a few limitations to keep in mind. The pump needs a manual prime at first startup, and it is not designed for use with water sources deeper than 20 feet. At 33 pounds, it is sturdy but may be awkward to lift into place, so plan for a helper during installation.

Overall, the Flotec sprinkler pump delivers dependable performance, durable construction, and easy serviceability for the price. It is a solid choice for anyone upgrading an aging irrigation pump or installing a new system on a residential property.

Brand: Flotec (sold by Factory Hardware Store)

Model Number: FP5172-08

Horsepower: 1.5 HP

Maximum Flow Rate: 4,020 GPH (67 GPM)

Power Source: Corded Electric

Voltage: 115V / 230V Dual Voltage

Material: Fiberglass-Reinforced Thermoplastic

Product Style: Above Ground

Discharge Connection: 1-1/2 Inch

Maximum Suction Depth: 20 Feet

Water Temperature Range: 35°F to 140°F

Item Weight: 33 Pounds

The FOTING 1.5HP Shallow Well Pump with Pressure Tank is a robust solution for homeowners and gardeners needing reliable water pressure. Designed for shallow wells up to 23 feet deep, this pump delivers up to 1340 gallons per hour and a maximum lift of 164 feet, making it perfect for irrigation, lawn watering, and boosting household water supply.

Standout features include a powerful 1.5HP motor paired with a 5-gallon pressure tank that automatically maintains pressure. The switch starts the pump at 1.5 bar and shuts off at 3 bar, ensuring consistent flow without manual intervention. Users praise its strong, steady performance and ease of installation, with many noting significant improvement over older pumps.

Build quality is solid with a reinforced thermoplastic body and an iron tank that resists corrosion. Overheat protection and a carbon ceramic mechanical seal enhance durability and prevent leaks. The pump comes with two adapters and is straightforward to set up, though it requires initial priming.

One potential drawback is the plastic fittings, which can be overtightened if not careful. Additionally, it is specifically for shallow wells, so it may not suit deeper applications. Despite these minor concerns, the FOTING pump offers excellent value for its price point, backed by a three-year warranty and responsive customer support.

Verdict: For anyone needing a reliable, automatic shallow well pump for garden or home use, the FOTING 1.5HP model is a smart choice. Its combination of power, durability, and ease of use makes it a top performer in its category.

The Flotec FP5172 is a 1.5 horsepower thermoplastic sprinkler pump designed for demanding lawn irrigation, pond filling, and water transfer tasks. It is an excellent choice for homeowners with large properties, automatic sprinkler systems, or agricultural water needs, delivering up to 4020 gallons per hour with ease.

This pump can operate up to 30 sprinkler heads at once, making it a powerful workhorse for 2-acre irrigation systems. Owners report it draws water from depths of 15 to 20 feet and maintains pond levels effectively, running for hours without issue. The self-priming feature, once the housing is initially filled, prevents overheating and simplifies startup.

Constructed from fiberglass-reinforced thermoplastic, the pump resists corrosion much better than traditional cast iron, while weighing only 33 pounds. The AO Smith motor is reliable and dual voltage capable, and the easy-access service points make routine maintenance straightforward.

The main drawbacks are the tight wiring compartment, which can make electrical connections a bit awkward, and the plastic housing, which is less impact-resistant than metal. Also, the pump must be initially primed with water before it will self-prime, a step first-time users should remember.

Overall, the Flotec FP5172 offers exceptional value for the money. It delivers performance that rivals pumps costing three times as much, with the corrosion resistance and light weight modern materials provide. For anyone needing a dependable, high-capacity sprinkler pump, this is a smart buy.

The Sta-Rite FP5182 2 HP Sprinkler Pump is a robust solution for homeowners with large lawns or irrigation systems. Designed for above-ground use, it draws water from depths up to 20 feet and powers up to 30 sprinkler heads, making it ideal for properties of half an acre or more.

Its standout feature is the fiberglass-reinforced thermoplastic housing, which offers exceptional corrosion resistance compared to metal pumps. Users report this pump lasting over a decade under tough conditions, a testament to its build quality. The self-priming function simplifies startup after the initial fill, reducing maintenance time.

Performance is impressive: 69 gallons per minute flow rate ensures even coverage across large areas. The 230-volt motor delivers consistent power, though it requires a dedicated circuit. Installation is straightforward for those handy with basic plumbing and electrical work, as the motor comes pre-mounted and ready to wire.

A few drawbacks include the pump's weight (41 pounds) and the need for a 230V outlet, which may require an electrician. Some users noted the listed dimensions are misleading, as the actual unit is larger. Additionally, while self-priming after initial fill, the pump housing must be manually filled first.

Overall, the Sta-Rite FP5182 is a top choice for durable, high-capacity lawn irrigation. With strong customer reviews and a reputation for longevity, it offers excellent value for those needing reliable water delivery across multiple sprinkler zones.

The WASSERMANN Centrifugal Pump 1.5 HP is a powerful, self-priming shallow well jet pump designed for demanding water transfer tasks. It is an ideal replacement for the Goulds GT15, offering a robust 66 GPM flow rate and 126-foot maximum head to handle lawn sprinklers, garden irrigation, and shallow well water extraction. This pump targets homeowners and light agricultural users seeking a reliable, high-performance booster pump.

Standout features include a dual voltage (115V/230V) motor for flexible installation and industrial-grade cast iron construction that resists corrosion. Users report it primes quickly (under a minute) and matches the performance of the Goulds GT15 with identical pipe fitting dimensions. The integrated thermal overload protection adds safety and extends pump life, while the quiet operation is a welcome bonus.

Build quality is solid, with a heavy-duty cast iron body, stainless steel hardware, and BUNA elastomers. The pump measures 13 by 10 by 22 inches and weighs enough to require a sturdy base. Most reviews praise its durability and ease of setup, though a few mention occasional priming difficulties that may require a restart.

Potential drawbacks include a limited number of customer reviews (13 at time of analysis) and isolated reports of pumps failing after a month. The manufacturer offers a 2-year warranty and responsive customer support, which should mitigate concerns. However, buyers should ensure proper installation and priming to avoid issues.

Overall, the WASSERMANN 1.5 HP centrifugal pump provides excellent value as a Goulds GT15 replacement at a fraction of the cost. Its powerful flow, durable build, and user-friendly design make it a strong choice for residential irrigation and shallow well applications. For those seeking a dependable, budget-friendly alternative, this pump is worth considering.

The Aquastrong 1.6 HP shallow well garden pump is a robust solution for homeowners needing to transfer water from wells, ponds, or rain barrels to irrigate lawns and gardens. With a 1320 GPH flow rate and a 164-foot lift capacity, it handles demanding watering tasks efficiently while remaining portable thanks to its iron handle.

In real-world use, the pump demonstrates strong performance. Users report running it continuously for days in hot weather to water lawns, and it handles multiple sprinkler heads well. Once properly primed, the pump operates reliably with low noise and good pressure, making it a workhorse for irrigation.

The build quality is excellent for the price. Stainless steel casing and aluminum motor housing resist corrosion, ensuring longevity in outdoor conditions. The waterproof on/off switch and carbon ceramic mechanical seal prevent leaks. Installation is straightforward with 1-inch NPT fittings and a garden hose adapter included.

However, the pump is not self-priming and requires manual filling before each use. Some users find the priming process frustrating, especially the small fill hole that needs a socket wrench. Additionally, a few reviews mention pump failure after short use and poor customer service follow-up, though most experiences are positive.

Overall, the Aquastrong pump offers great value for its price. It is durable, powerful, and portable, ideal for anyone who can manage the priming step. With a two-year warranty, it is a solid investment for reliable water transfer and irrigation.

The Aquastrong 1.6 HP shallow well jet pump is a versatile water booster designed for garden irrigation, lawn sprinklers, and domestic water supply. With a maximum flow of 1320 GPH and suction up to 26 feet, it suits homes, cabins, and farms needing reliable water pressure from shallow wells or rainwater tanks.

Standout features include automatic operation via a pressure switch (20-40 psi) and a compact 5-gallon pressure tank, which reduces pump cycling and prolongs lifespan. The stainless steel housing resists corrosion, and the thermal overload protection prevents damage from dry running. Users report powerful performance and easy installation, with many praising the quiet operation.

Build quality is generally solid, but a few customers experienced cracks or leaks after 18-24 months. While Aquastrong’s warranty and customer service are highly rated, the motor is not sold separately, forcing full replacement. The included garden hose adapters and PTFE tape simplify hookup, though a check valve is recommended for best results.

Drawbacks are limited to long-term durability for some units, and the lack of a replaceable motor may frustrate those expecting modular repair. However, the pump’s performance and support team often offset these concerns.

Verdict: The Aquastrong shallow well pump offers excellent value for its power and automation. Ideal for homeowners needing a reliable booster for irrigation or light domestic use, but be aware of potential longevity issues. Strongly consider the warranty and responsive service when making your decision.

The AQUASTRONG 1.5 HP Shallow Well Jet Pump is a high-performance centrifugal pump designed for demanding lawn sprinkler and garden irrigation tasks. With a massive 4250 GPH flow rate and 108-foot maximum head, it can easily water large properties or supply water to multiple sprinkler zones. This pump is ideal for homeowners with shallow wells or those needing a reliable booster for irrigation systems.

Standout features include a reinforced impeller and diffuser that maximize efficiency and water flow, ensuring consistent performance even under heavy use. The dual voltage motor (115/230V) adds flexibility for different electrical configurations, and it comes factory set at 230V for quick setup. Customer reviews highlight its powerful output and quiet operation, making it a strong choice for residential areas.

Build quality is robust thanks to the cast iron volute, which resists corrosion and wear over time. The automatic thermal overload protector adds peace of mind by preventing motor burnout. However, some users have noted that maintaining prime can be tricky, especially if connections are not perfectly sealed. Using metal fittings instead of PVC is recommended to avoid leaks and prime loss.

While the pump itself is well-made, it lacks a pressure switch or tank, so you will need to purchase those separately for a complete pressure system. This may add to the overall cost and installation complexity. Despite these minor drawbacks, the pump offers excellent value for its price point and is a top seller in its category.

Overall, the AQUASTRONG 1.5 HP Shallow Well Jet Pump is a reliable, powerful choice for large-scale irrigation needs. Its durable construction, high flow rate, and quiet operation make it a solid investment for homeowners who want to keep their lawns lush and gardens thriving. Just be sure to use metal fittings and follow installation instructions carefully to avoid prime issues.

Brand: AQUASTRONG

Model: SPRK150

Horsepower: 1.5 HP

Flow Rate: 4250 GPH (69.99 GPM)

Max Head: 108 ft

Voltage: 115/230V (dual voltage, factory set at 230V)

Suction Size: 2-inch NPT

Discharge Size: 1.5-inch NPT

Material: Cast Iron volute

Dimensions: 22.8 x 11.8 x 12.4 inches

Weight: Not specified

Power Source: Corded electric

Warranty: Not specified

Before purchasing this pump, ensure your well depth is within the shallow well range (typically under 25 feet). This pump is not designed for deep wells. You will need a separate pressure tank and pressure switch if you want a fully automatic system for household water pressure.

For installation, use metal fittings (galvanized steel or brass) on both suction and discharge ports to prevent leaks and prime loss. PVC fittings may crack or fail under pressure. Apply pipe dope or Teflon tape to all threaded connections for a watertight seal.

If you experience prime loss, check all fittings for air leaks. The pump must be located as close to the water source as possible and installed with a foot valve or check valve to hold prime. Regular maintenance includes cleaning the impeller and checking for debris in the suction line.

The Goulds GT20 IRRI-Gator is a self-priming centrifugal pump designed for heavy-duty irrigation, dewatering, and water transfer applications. With a 2 HP motor running on 230 volts, it delivers up to 86 GPM at 20 PSI and can handle a maximum suction lift of 25 feet. This pump is ideal for homeowners with large lawns, agricultural users, and professionals who need a reliable workhorse that can move water quickly over distances and inclines.

Standout features include the self-priming design that automatically re-primes once water reaches the suction pipe, saving time and frustration. The back pullout construction allows the pump to be serviced without disturbing the piping, a major plus for maintenance. Users report outstanding real-world performance: one reviewer noted it easily supplies water to sprinklers 200 feet away with a 25-foot incline, while another praised its ability to prime instantly and build pressure faster than any pump they had used before.

Build quality is robust, with a cast iron casing protected by an electro-coat paint process applied inside and out. The impeller and diffuser are made from FDA-compliant, glass-filled Noryl and Lexan, respectively, offering excellent corrosion and abrasion resistance. The mechanical seal features carbon/ceramic faces with 300 series stainless steel parts, ensuring longevity even in continuous operation. The motor includes built-in overload protection with automatic reset for added safety.

One potential drawback is the plastic impeller; although it is durable, some users wish for a metal option (brass or stainless) for extreme abrasive conditions. Additionally, at 59 pounds, the pump is heavy and may require a sturdy mounting surface or assistance during installation. The price is higher than basic consumer pumps, but the build quality and long service life (many owners report 15-20 years of use) justify the investment.

Overall, the Goulds GT20 is a top-tier choice for anyone needing a high-performance, self-priming centrifugal pump for irrigation or water transfer. Its combination of power, durability, and ease of maintenance makes it a standout in its category. If you are willing to invest in quality and want a pump that will last for decades, the GT20 is an excellent purchase.

Motor: 2 HP, 230V, single phase, with built-in overload and automatic reset

Pipe Connections: 1-1/2" NPT suction and discharge

Max Suction Lift: 25 ft

Max Total Dynamic Head: 127 ft

Max Discharge Pressure: 55 PSI

Flow Rate: Up to 86 GPM at 20 PSI (5 ft suction lift)

Materials: Cast iron casing, glass-filled Noryl impeller, glass-filled Lexan diffuser, carbon/ceramic mechanical seal, BUNA elastomers, 300 series stainless steel hardware

Dimensions: 23.2" L x 10.5" W x 10.1" H

Weight: 59 lbs

Color: Blue

The ECO-WORTHY 33-Series Industrial Water Pressure Pump is a 110V AC diaphragm pump designed to deliver 4.0 gallons per minute at 50 PSI. It is an excellent solution for boosting water pressure in RVs, marine vessels, irrigation systems, and garden sprinklers. The pump comes with garden hose adapters, making it ready to use out of the box for a variety of applications.

Standout features include a smart pressure switch that automatically turns the pump on when water is needed and off when faucets close, saving energy and reducing noise. Users consistently praise its quiet operation and strong, consistent pressure. The pump self-primes up to 9.8 vertical feet and can lift water up to 131 feet, handling demanding tasks like multiple sprinklers or showers simultaneously.

Build quality is solid with a metal construction that feels durable. The pump includes thermal overload protection for safety, automatically shutting off if it exceeds 203°F. Installation is straightforward thanks to the included adapters and clear wiring instructions. Many customers report easy setup and reliable performance for everyday RV living or garden watering.

However, a few users have noted that the pressure switch can fail after a month or two of heavy daily use, especially in full-time RV living. While the company offers good customer support and warranty service, this is a potential concern for those needing uninterrupted operation. The pump is not designed for continuous commercial use, so occasional maintenance may be required.

Overall, the ECO-WORTHY 33-Series pump offers excellent value for its price, delivering powerful, quiet water pressure for most residential, RV, and marine needs. If you are looking for a dependable pump for occasional to moderate use, this is a strong choice. For heavy daily demands, consider a more heavy-duty model or keep a backup on hand.