A.Y. McDonald 24000 Series - R-35 GPM High Flow Stainless Steel Pump End, 1-10 HP
A.Y. McDonald 24000 Series High Flow S - 55 GPM Pump End performance curve: total head vs flow by horsepower, Pumps by Baker catalog p. 86
A.Y. McDonald 24000 Series - R-35 GPM High Flow Stainless Steel Pump End, 1-10 HP
A.Y. McDonald 24000 Series High Flow S - 55 GPM Pump End performance curve: total head vs flow by horsepower, Pumps by Baker catalog p. 86

A.Y. McDonald 24000 Series S - 55 GPM 4 in High Flow Stainless Steel Submersible Pump End

HP: 7 1/2 HP
Model - Head: 24750S - 369 ft at 55 GPM

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$2,136.05
SKU: 6630-209
Weight : 27.0 lb
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Description
A.Y. McDonald · Submersible Pump End
24000 Series High Flow S - 55 GPM Pump End
High Flow Stainless Steel 4 in pump end for Baker NEMA 4 in motors, 1 1/2 to 10 HP, 6 models.
78-507 ft at 55 GPM
1 1/2-10 HP
Fits NEMA 4 in Motors
823 ft Max Head (Shut-off)
2 in NPT Discharge
Built-In Check Valve
Drinking Water ANSI/NSF 61
4 in Pump End, 17-67.2 in L
10-35 lb Weight
What Ships and What It Needs to Run

Included: the 24000 Series S - 55 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 24000 Series S - 55 GPM pump end is the hydraulic end of Baker’s 24000 Series High Flow 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 discharge casting (2 in NPT), check valve, bowls, shell, screen, shaft, cable guard and NEMA motor bracket are stainless steel; the impellers are Noryl. Across the line the High Flow series delivers up to 124 GPM and up to 1300 ft of head at 3450 rpm.

This listing covers 1 1/2 to 10 HP (6 models), all with a 2 in NPT discharge.

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 S - 55 GPM class with the matching larger motor. Need more flow? Move to a higher flow class of the 24000 Series High Flow; every class uses the same 2 in NPT discharge, so the drop pipe connection stays the same.

Shared Specifications
Included Pump end with built-in check valve
Discharge 2 in NPT (female)
Motor fit NEMA 4 in Baker submersible motor of the same horsepower
Well size 4 in and larger
Check valve Built in
Pump energy index (PEI) 0.95
Certification Drinking Water ANSI/NSF 61
App connection None

Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 85-86.

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 79.5–80 GPM

HP 0 GPM (Shut-off) 20 GPM 40 GPM 60 GPM 70 GPM
1 1/2 HP 138 ft 124 ft 103 ft 68 ft 45 ft
2 HP 194 ft 178 ft 145 ft 97 ft 65 ft
3 HP 249 ft 229 ft 186 ft 128 ft 93 ft
5 HP 420 ft 378 ft 316 ft 225 ft 161 ft
7 1/2 HP 626 ft 562 ft 464 ft 333 ft 239 ft
10 HP 823 ft 744 ft 643 ft 453 ft 317 ft

Read from the published curve in the Pumps by Baker catalog (Sept 2025, rev 3/26), p. 86, digitized and rounded down, at the flows nearest 20%, 50% and 75% of the curve’s 80.1 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 20 ft 30 ft 40 ft 100 ft 120 ft 160 ft 180 ft
1 1/2 HP 47.5 42.5 32.5 — — — —
2 HP 62 60 55 25 — — —
3 HP — — 66 46 38 17 —
5 HP — — — 68 66 58 55
7 1/2 HP — — — — 74 71 69
10 HP — — — — — 76 75

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

HP 20 ft 30 ft 40 ft 100 ft 120 ft 160 ft 180 ft
1 1/2 HP — — — — — — —
2 HP 45 38 35 — — — —
3 HP 60 58 53 27 16 — —
5 HP — — 71 62 58 51 46
7 1/2 HP — — — 72 71 67 65
10 HP — — — 77 76 74 72

Output tables as printed in the Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 85-86, 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 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
7 1/2 HP 3Ph 3132-520
10 HP 3Ph 460V 3132-523

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
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 head Stainless steel 304, 2 in NPT discharge
Motor adapter Stainless steel 304, NEMA standard
Check valve Stainless steel 304
External shell Stainless steel 304, polished
Impellers Noryl
Diffusers Polycarbonate
Bearing Polyacetal
Shaft coupling Stainless steel 304, NEMA standard
Strainer Stainless steel 304
Shaft Stainless steel 304
Cable guard Stainless steel 304

Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 79-80.

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 24000 Series Guide
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