Will the RJS-100-PREM well pump handle several fixtures at once with its 23 GPM flow rate?

For this answer to hold, your plumbing must not add heavy friction loss, and your electrical supply must match the pump’s 115V or 230V requirement before you buy.

You can find a complete analysis in our full RJS-100-PREM review.

Why 23 GPM matters for running several fixtures at once

That 23 GPM figure is the key number for simultaneous use, because flow rate measures how much water the pump can move while fixtures are open. We selected this model for a full review because its listed output, 1 HP motor, and 150 ft max head give a clear read on where it sits for larger homes. In a well setup, dynamic head matters because lift and pipe losses can eat into usable pressure at the tap.

For a deeper look at technical specs, see how the RJS-100-PREM performs.

What to Check Before Buying the RJS-100-PREM

• Measure your expected simultaneous demand. If your fixtures need more than the low-20s in GPM, 23 GPM may not leave much margin.
• Check your total dynamic head. That is the lift plus friction loss the pump must overcome while water is moving.
• Confirm your pipe run and fittings. Long runs and small pipe increase friction loss, which can throttle high-flow output.
• Verify your power supply. The motor is listed for 115 Volts or 230 Volts, and the voltage must match your source.
• Check the intake side size. The listing gives a 1-1/4 FNPT suction intake, so your existing plumbing must match that connection.
• Match the pressure system. The factory 30/50 pressure switch and 50 PSI working maximum pressure matter if your tank and switch setup already differ.

Where the RJS-100-PREM Fits Among Well Pump Options

RJS-100-PREM sits in the middle of the household well pump field for buyers who want 1 HP and 23 GPM without moving to a larger system. A shallow well jet pump like this one suits a home with moderate demand and a straightforward pressure setup. If you need more margin for long pipe runs, higher lift, or heavier multi-fixture use, look at larger-capacity pump types instead. The same caution applies if your system needs a different discharge size or a different control arrangement.

If you are looking for off-grid options, see how to get water from your well without the grid.

Choose this pump if your home’s simultaneous water demand is around 23 GPM, your voltage is 115V or 230V, and your plumbing matches the intake and outlet sizes. The 4.1 average from 1,429 ratings adds buyer context, but the deciding point is still whether your own head, friction loss, and pressure setup fit its listed limits.

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Reviewed by the Predicament Measures editorial team.