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Cast iron horizontal booster pump with open dripproof motor

Dayton

Dayton 45MW18 Pressure Booster Pump 1 hp 120/240V 1 Phase 1-1/2 in NPT

SKU CH-PE5B-B7HA4

One-horsepower booster pump delivers 32 gpm at 30 psi and 27 gpm at 40 psi with 115/230 V single-phase power and 1-1/2 in NPT intake

  • 1 hp motor delivers strong pressure boost
  • 115/230V dual-voltage wiring fits standard circuits
  • 32 gpm at 30 psi for high-demand flow
  • cast-iron housing resists corrosion and wear
  • horizontal NPT mounting simplifies installation

Dayton 45MW18 Pressure Booster Pump

The Dayton 45MW18 is a single-phase pressure booster pump rated at 1 hp and 115/230V AC. It delivers up to 32 gpm at 30 psi and 23 gpm at 50 psi, with a maximum shut-off pressure of 60 psi. The cast-iron housing and open dripproof motor suit horizontal mounting in non-potable water systems.

1-1/2 in NPT intake and 1-1/4 in discharge

The pump accepts a 1-1/2 in NPT intake and a 1-1/4 in NPT discharge, so existing piping must match those sizes or be adapted. Flow rates fall from 32 gpm at 30 psi to 3 gpm at 60 psi, and best efficiency occurs at 48 psi. The 13 A draw at 115V or 6.3 A at 230V determines the circuit capacity needed.

Check voltage, piping and potable rating

Verify that the supply voltage matches 115/230V single-phase and that the circuit can handle the listed amperage. Confirm the system is non-potable, as the pump is not rated for drinking water. Ensure horizontal mounting space and compatible NPT thread sizes are available before ordering.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $899.99
Pricier than about 91% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameDAYTON

Questions about this item

How often will the cast-iron housing and open-dripproof motor need inspection or seal replacement?

The cast-iron housing resists corrosion, but the open-dripproof motor enclosure allows dust and moisture inside, so plan to check shaft seals and bearings annually and replace them if leakage or noise appears.

At what pressure does the flow drop off most sharply during continuous operation?

Flow falls from 27 gpm at 40 psi to only 3 gpm at 60 psi, making 60 psi the practical shut-off limit where sustained output nearly stops.

How hot and loud does the 1 hp motor get when running all day on 115 V at 13 A?

The open-dripproof 1 hp motor draws 13 A at 115 V, so expect noticeable heat and typical industrial pump noise during extended runs; ensure ventilation and secure mounting to limit vibration.

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