A.Y. McDonald 23000 Series J - 5 GPM 4" Stainless Steel Submersible Pump End, 1/2-1.5 HP
A.Y. McDonald 23000 Series M - 25 GPM Pump End performance curve: total head vs flow by horsepower, Pumps by Baker catalog p. 64
A.Y. McDonald 23000 Series J - 5 GPM 4" Stainless Steel Submersible Pump End, 1/2-1.5 HP
A.Y. McDonald 23000 Series M - 25 GPM Pump End performance curve: total head vs flow by horsepower, Pumps by Baker catalog p. 64

A.Y. McDonald 23000 Series M - 25 GPM 4 in Stainless Steel Submersible Pump End

HP: 1/2 HP
Model - Head: 23050M - 64 ft at 25 GPM

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$419.64
SKU: 6650-228
Weight : 6.38 lb
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Description
A.Y. McDonald · Submersible Pump End
23000 Series M - 25 GPM Pump End
Stainless Steel 4 in pump end for Baker NEMA 4 in motors, 1/2 to 5 HP, 7 models.
64-480 ft at 25 GPM
1/2-5 HP
Fits NEMA 4 in Motors
796 ft Max Head (Shut-off)
1 1/4 in NPT Discharge
Built-In Check Valve
3 3/4 in Dia x 10.9-34.9 in L
7-18 lb Weight
What Ships and What It Needs to Run

Included: the 23000 Series M - 25 GPM pump end with its built-in check valve.

Motor required, ordered separately: a Baker 4 in motor of the same horsepower. Part numbers for the 230V motors are in the motor table under Models & Performance.

And the motor’s control: two-wire motors need none; single-phase three-wire motors need a control box; three-phase motors need a starter kit.

Overview

The 23000 Series M - 25 GPM pump end is the hydraulic end of Baker’s 23000 Series 4 in submersible pump, sold without the motor. It mounts on a NEMA 4 in Baker motor of the same horsepower, to build a new pump or rebuild one in the field.

The diffusers use Baker’s captured stack design, with sand notches that keep sand moving through the pump. Each pump is individually tested after assembly and stamped with the tester’s mark.

This listing covers 1/2 to 5 HP (7 models), all with a 1 1/4 in NPT discharge.

  • Discharge — 300 series stainless steel, easy-wrench design with built-in safety eye; threads into the shell.
  • Check valve — Baker Diamond Design, easy-out for service.
  • Discharge bearing — rubber around the stainless steel shaft; self-lubricating.
  • Diffusers — polycarbonate, corrosion and abrasion resistant, built for sand handling.
  • Impellers — glass bead acetal.
  • Shaft — 7/16 in 300 series stainless steel, hex drive, each one measured for straightness.
  • Shell — heavy stainless steel, threaded at both ends for field service.
  • Cable guard — stainless steel; angled top keeps the leads in place.
  • Motor bracket — stainless steel.
Genuine A.Y. McDonald equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier. Watermain Supply is an Authorized Stocking A.Y. McDonald and Baker Water Systems Distributor.
A.Y. McDonald Limited Warranty

Covered for 2 years from the date of manufacture or 1 year from the date of installation, whichever comes first, under A.Y. McDonald’s standard limited warranty for Baker products.

Room to Grow

One pump end per motor. Need more head later? Step up in horsepower within the M - 25 GPM class with the matching larger motor. Need more flow? Move to a higher flow class of the 23000 Series; every class uses the same 1 1/4 in NPT discharge, so the drop pipe connection stays the same.

Shared Specifications
Included Pump end with built-in check valve
Discharge 1 1/4 in NPT (female)
Pump diameter 3 3/4 in with cable guard
Motor fit NEMA 4 in Baker submersible motor of the same horsepower
Well size 4 in and larger
Check valve Built in
App connection None

Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 63-64.

Models & Performance — Will It Do What You Need?

Find your horsepower in the row, then read across. Total head is the lift from the pumping water level to the discharge, plus the pressure you want at the tank (2.31 ft for every PSI), plus friction in the drop pipe.

Total head in feet · curves end at 32–39.5 GPM

HP 0 GPM (Shut-off) 7.5 GPM 20 GPM 27.5 GPM 30 GPM
1/2 HP 122 ft 109 ft 80 ft 56 ft 46 ft
3/4 HP 152 ft 138 ft 107 ft 73 ft 61 ft
1 HP 219 ft 202 ft 150 ft 113 ft 97 ft
1 1/2 HP 282 ft 259 ft 204 ft 159 ft 140 ft
2 HP 374 ft 342 ft 263 ft 193 ft 163 ft
3 HP 507 ft 469 ft 362 ft 266 ft 226 ft
5 HP 796 ft 736 ft 576 ft 426 ft 366 ft

Read from the published curve in the Pumps by Baker catalog (Sept 2025, rev 3/26), p. 64, digitized and rounded down, at the flows nearest 20%, 50% and 75% of the curve’s 39.9 GPM end. 0 GPM is the printed shut-off. The last column is the last flow every curve reaches; the curve ends are named in the table title.

Output in GPM at 30 PSI (switch cut-in), by depth to water

HP 25 ft 50 ft 100 ft 150 ft 200 ft 250 ft 300 ft
1/2 HP 15.93 2.93 — — — — —
3/4 HP 23.22 16.71 — — — — —
1 HP 29.81 26.22 17.35 — — — —
1 1/2 HP 33.65 31.08 25.26 17.91 6.06 — —
2 HP — 33.26 29.37 24.97 19.79 13.16 1.33
3 HP — 35.85 33.16 30.28 27.12 23.62 19.61
5 HP — 38.3 36.8 35.2 33.5 31.7 29.8

Output in GPM at 50 PSI (switch cut-out), by depth to water

HP 25 ft 50 ft 100 ft 150 ft 200 ft 250 ft 300 ft
1/2 HP — — — — — — —
3/4 HP 8.81 — — — — — —
1 HP 22.80 18.14 2.61 — — — —
1 1/2 HP 28.74 25.74 18.56 7.42 — — —
2 HP — 29.68 25.33 20.23 13.75 2.92 —
3 HP — 33.38 30.50 27.37 23.90 19.94 15.19
5 HP — 36.9 35.3 33.6 31.9 30.0 28.0

Output tables as printed in the Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 63-64, at the 30 and 50 PSI rows. Riser-pipe friction is not included (manufacturer note): add it for long or small drop pipe. — marks a point A.Y. McDonald does not print for that horsepower.

Baker 4 in motor by horsepower (230V unless marked, ordered separately)

HP Motor
1/2 HP 2-wire 3132-005 · 3-wire 3132-004 · 3Ph 3132-525
3/4 HP 2-wire 3132-006 · 3-wire 3132-000 · 3Ph 3132-527
1 HP 2-wire 3132-007 · 3-wire 3132-001 · 3Ph 3132-529
1 1/2 HP 2-wire 3132-009 · 3-wire 3132-002 · 3Ph 3132-531
2 HP 3-wire 3132-510 · 3Ph 3132-534
3 HP 3-wire 3132-512 · 3Ph 3132-514
5 HP 3-wire 3132-513 · 3Ph 3132-517

Best operating range: the published curve shades the most efficient operating range for each model; the catalog prints no figures for it. The curve is in the image gallery.

Before You Buy — The Limits That Decide the Fit
Motor NEMA 4 in Baker submersible motor of the same horsepower; the pump end does not run without one
Motor control Two-wire motors: none. Single-phase three-wire: control box. Three-phase: starter kit
Well size 4 in casing and larger; the pump end is 3 3/4 in diameter with the cable guard
Riser friction Not included in the output tables; add it before choosing
Pairing One pump end per motor, one pump per well
Materials of Construction
Discharge 300 series stainless steel, easy-wrench design with built-in safety eye; threads into the shell
Check valve Baker Diamond Design, easy-out for service
Discharge bearing Rubber around the stainless steel shaft; self-lubricating
Diffusers Polycarbonate, corrosion and abrasion resistant, built for sand handling
Impellers Glass bead acetal
Shaft 7/16 in 300 series stainless steel, hex drive, each one measured for straightness
Shell Heavy stainless steel, threaded at both ends for field service
Cable guard Stainless steel; angled top keeps the leads in place
Motor bracket Stainless steel

Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 51-52.

For engineering-led sizing and selection support or a factory submittal, email sales@watermainsupply.com or call 1-888.510.4036.
© Watermain Supply — A division of E4 Industrial LLC
Data Sheet
Pumps by Baker 23000 Series Guide
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