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Dayton turbine pump, cast iron housing, open motor, 1/3 hp

Dayton

Dayton 4JPF1 Turbine Pump 1/3 HP 115/230V 7.5/3.8A

SKU CH-N5HB-P5ZMZ

Single-phase turbine pump delivers up to 2.6 gpm at 20 psi with a 1/3 hp motor on 115/230V supply

  • 1/3 HP motor drives up to 2.6 gpm flow
  • 115/230V dual-voltage suits varied power supplies
  • Open dripproof enclosure protects motor internals
  • Cast iron housing withstands 200 psi case pressure
  • Capacitor-start/run motor delivers reliable single-phase operation

Dayton 4JPF1 Turbine Pump — Application & Fit

This single-phase turbine pump delivers 1/3 hp for residential and light-commercial water transfer. It suits installations that require a cast-iron housing with 3/4 in NPT intake and discharge connections. The capacitor-start/run motor operates on 115/230V AC at 7.5/3.8 A, making it compatible with standard single-phase supplies. Buyers needing higher flow rates or three-phase power should consider other models.

Thermals, Noise & Power Draw

The open dripproof motor enclosure allows ambient airflow for cooling during continuous duty. Power draw stays at the nameplate 7.5 A on 115V or 3.8 A on 230V under normal loading. Operating sound is typical of capacitor-start/run turbine designs in this horsepower class. Maximum case pressure is rated at 200 psi, and the pump develops up to 140 psi shut-off head.

Upgrade Context & When It Pays Off

This unit replaces older 1/3 hp turbine pumps with identical 3/4 in NPT ports and single-phase voltage. The jump is worth it when the existing pump cannot reach 85 ft best-efficiency head or deliver 2.5 gpm at 10 psi and 2.6 gpm at 20 psi. It does not suit systems requiring flows above 2.6 gpm or pressures beyond 140 psi shut-off.

Highlights

  • 1/3 HP motor drives up to 2.6 gpm flow
  • 115/230V dual-voltage suits varied power supplies
  • Open dripproof enclosure protects motor internals
  • Cast iron housing withstands 200 psi case pressure
  • Capacitor-start/run motor delivers reliable single-phase operation

Specifications

BrandDAYTON

Questions about this item

How do I wire the 115/230 V single-phase motor and which step is most often missed?

Match the supply voltage to the nameplate 115/230 V AC, connect the capacitor-start/run leads exactly as the diagram shows, and verify rotation before tightening the 3/4 in NPT discharge — reversing the motor is the step installers skip.

What part will need replacement first on this cast-iron turbine pump?

The capacitor-start/run motor and the mechanical seal are the wear items; the open-dripproof enclosure lets dust in, so plan to inspect the seal and capacitor at each seasonal shutdown.

At what pressure does the 1/3 hp turbine hit its shut-off limit during continuous operation?

The pump reaches its shut-off pressure of 140 psi, which is well below the 200 psi case maximum, so sustained running against a closed valve will stall at 140 psi before the housing is stressed.

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