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Stainless steel automatic pressure booster pump unit

Dayton

Dayton 4HFA7 Automatic Pressure Booster System 3/4 hp 115V 1 Phase

SKU CH-CKJG-ZJ1WG MPN 4HFA7

Constant pressure booster system with a 3/4 hp motor running at 3450 RPM on 115 V single-phase power

  • TypeDrain Components
  • 3/4 HP motor delivers consistent water pressure boost
  • 115 V single-phase power suits standard residential wiring
  • Stainless steel housing resists corrosion for long service life
  • Two-stage thermoplastic impeller maintains steady flow at 3450 RPM
  • TEFC enclosure rated for 65 °C ambient protects motor in hot environments

Automatic Pressure Booster System

The Dayton 4HFA7 is a constant-pressure booster system rated at 3/4 hp and 115V single-phase power. It targets residential or light-commercial installations that need consistent water pressure from a single inlet. The unit draws 6.1 amps at 60 Hz and uses a TEFC motor rated for ambient temperatures up to 65 degrees C.

Installation notes and common issues

The pump connects via a 1-inch port and operates on standard 115V household wiring, so a qualified installer can wire it without special circuits. The stainless-steel housing and thermoplastic internals resist corrosion, but debris in the supply line can damage the closed thermoplastic impeller or the Buna seal. Verify that inlet pressure and flow stay within the two-stage design limits to avoid cavitation.

Capacity and headroom

Two thermoplastic stages deliver steady pressure for typical household fixtures and irrigation zones. The 1.1 service factor provides a small margin above the 3/4 hp nameplate rating, but sustained demand beyond the design flow will cause pressure drop and motor heating. The 3450 RPM motor and ceramic-carbon-buna wear surfaces handle clean water duty; they are not suited for abrasive fluids or continuous high-volume commercial loads.

Highlights

  • 3/4 HP motor delivers consistent water pressure boost
  • 115 V single-phase power suits standard residential wiring
  • Stainless steel housing resists corrosion for long service life
  • Two-stage thermoplastic impeller maintains steady flow at 3450 RPM
  • TEFC enclosure rated for 65 °C ambient protects motor in hot environments

Specifications

TypeDrain Components
BrandDayton
Model4HFA7

Questions about this item

How can I confirm the booster system is delivering constant pressure after installation?

Verify the motor runs at 3450 RPM and draws approximately 6.1 amps at 115 V while the pressure gauge holds steady at the set point.

What components are included with the 4HFA7 and what must be purchased separately?

The unit ships as a complete constant-pressure booster with stainless-steel housing, two thermoplastic impeller stages and Buna-N seal; piping, fittings and a pressure tank are not included.

Which version of this booster matches a 115 V single-phase supply and 3/4 hp requirement?

The 4HFA7 is the only model listed at 3/4 hp, 115 V AC, 1 phase, 60 Hz with a 1.1 service factor and TEFC motor rated for 65 °C ambient.

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