Goulds Pump J5S Shallow Well Jet Pump, 115/230 volt, 1/2 hp

The Goulds J5S Shallow Well Jet Pump delivers dedicated water pumping performance for residential shallow well applications. Powered by a 1/2 horsepower, single-phase motor running at 3500 RPM, it provides the necessary pressure to draw water efficiently into your home or outbuilding water system.

Electrical flexibility is a strong point of this unit, featuring a NEMA standard capacitor-start motor that can be wired for either 115-volt or 230-volt service at 60 Hz. The motor is protected by a built-in overload mechanism that resets automatically, while the stainless steel shaft offers durable mechanical performance. It rotates clockwise when viewed from the motor end and carries a UL778 safety listing.

For plumbing and regulation, the pump includes a standard pressure regulator alongside an AS4 pressure switch factory-preset to a 30-50 PSI range. Hookups are standardized with a 1.25-inch NPT suction port and a 1-inch NPT discharge port, making plumbing integration straightforward.

Keep in mind that because Goulds factory-tests these units prior to distribution, you might find residual water inside the housing upon unboxing. Additionally, buyers with different plumbing diameters will need to supply their own adapters to fit the 1.25-inch and 1-inch NPT ports.

Verdict: The Goulds J5S is an excellent choice for homeowners needing a reliable 1/2 HP shallow well replacement pump with dual-voltage wiring options and built-in pressure controls.

• Horsepower: 1/2 HP
• Voltage: 115/230 V (Single phase, 60 Hz)
• Motor Speed: 3500 RPM
• Motor Standard: NEMA standard capacitor start
• Shaft Material: Stainless steel
• Suction Connection: 1.25-inch NPT
• Discharge Connection: 1-inch NPT
• Pressure Switch: AS4 preset (30-50 PSI)
• Rotation: Clockwise (viewed from motor end)
• Certifications: UL778 listed
• Protection: Built-in overload with automatic reset
• Included Accessories: Pressure regulator

A great fit if you:

• Need a 1/2 HP replacement pump for an existing shallow well setup.
• Want the flexibility to wire your pump for either 115V or 230V power.
• Prefer a unit that already includes a preset 30-50 PSI pressure switch and regulator.

Consider something else if you:

• Need a pump configured for pipe sizes other than 1.25-inch suction and 1-inch discharge without using adapters.
• Require counter-clockwise motor rotation for specialized installations.

What are the plumbing connection sizes?
The pump features a 1.25-inch NPT suction port and a 1-inch NPT discharge port.

Why is there water inside the pump when it arrives?
Goulds tests each pump at the factory before shipment, which can leave small amounts of residual water inside the unit.

What electrical supply does this pump require?
It runs on a single-phase, 60 Hz electrical supply and can be configured for either 115-volt or 230-volt operation.