A.Y. McDonald 26000 Series J - 5 GPM 4" All Stainless Steel Pump End, 1/2-2 HP
A.Y. McDonald 26000 Series J - 5 GPM Pump End performance curve: total head vs flow by horsepower, Pumps by Baker catalog p. 108
A.Y. McDonald 26000 Series J - 5 GPM 4" All Stainless Steel Pump End, 1/2-2 HP
A.Y. McDonald 26000 Series J - 5 GPM Pump End performance curve: total head vs flow by horsepower, Pumps by Baker catalog p. 108

A.Y. McDonald 26000 Series J - 5 GPM 4 in All Stainless Steel Submersible Pump End

HP: 1/2 HP
Model - Head: 26050J - 235 ft at 5 GPM

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$562.51
SKU: 6636-000
Weight : 8.4 lb
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Description
A.Y. McDonald · Submersible Pump End
26000 Series J - 5 GPM Pump End
All Stainless Steel 4 in pump end for Baker NEMA 4 in motors, 1/2 to 2 HP, 5 models.
235-573 ft at 5 GPM
1/2-2 HP
Fits NEMA 4 in Motors
841 ft Max Head (Shut-off)
1 1/4 in NPT Discharge
Built-In Check Valve
CSA · Drinking Water ANSI/NSF 61
4 in Pump End, 16.8-31.7 in L
8.4-15.9 lb Weight
What Ships and What It Needs to Run

Included: the 26000 Series J - 5 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 26000 Series J - 5 GPM pump end is the hydraulic end of Baker’s 26000 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 shaft is 431 stainless steel and every other metal part is 304 stainless steel. Mounting follows the NEMA standard.

This listing covers 1/2 to 2 HP (5 models), all with a 1 1/4 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 J - 5 GPM class with the matching larger motor. Need more flow? Move to a higher flow class of the 26000 Series; discharge sizes run 1 1/4 in to 2 in across the series.

Shared Specifications
Included Pump end with built-in check valve
Discharge 1 1/4 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
Liquid temperature Up to 140°F (60°C)
Pumped liquids Clean, non-corrosive and non-abrasive
Certification CSA and Drinking Water ANSI/NSF 61
App connection None

Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 107-108.

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 8 GPM

HP 0 GPM (Shut-off) 1.5 GPM 4 GPM 6 GPM 7.5 GPM
1/2 HP 356 ft 327 ft 268 ft 194 ft 127 ft
3/4 HP 492 ft 466 ft 375 ft 271 ft 167 ft
1 HP 600 ft 567 ft 459 ft 331 ft 212 ft
1 1/2 HP 702 ft 668 ft 550 ft 392 ft 256 ft
2 HP 841 ft 800 ft 654 ft 470 ft 301 ft

Read from the published curve in the Pumps by Baker catalog (Sept 2025, rev 3/26), p. 108, digitized and rounded down, at the flows nearest 20%, 50% and 75% of the curve’s 8 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 160 ft 200 ft 220 ft 260 ft 280 ft 300 ft 340 ft
1/2 HP 5.3 4.4 3.8 2.0 — — —
3/4 HP 6.8 6.1 5.8 5.1 4.8 4.4 3.6
1 HP 7.5 6.9 6.7 6.1 5.8 5.6 5.0
1 1/2 HP — 7.5 7.3 6.8 6.6 6.3 5.9
2 HP — — — 7.4 7.2 7.0 6.7

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

HP 160 ft 200 ft 220 ft 260 ft 280 ft 300 ft 340 ft
1/2 HP 4.2 2.8 1.5 — — — —
3/4 HP 6.0 5.3 5.0 4.3 3.9 3.4 2.0
1 HP 6.9 6.3 6.0 5.5 5.2 4.9 4.4
1 1/2 HP 7.4 7.0 6.7 6.3 6.0 5.8 5.3
2 HP — 7.5 7.4 7.0 6.8 6.6 6.2

Output tables as printed in the Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 107-108, 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

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
Pumped liquids Clean, non-corrosive and non-abrasive, up to 140°F
Pairing One pump end per motor, one pump per well
Materials of Construction
Shaft Stainless steel 431
All other metal parts Stainless steel 304
Impellers and diffusers Stainless steel
Discharge head and check valve Stainless steel
Suction screen Stainless steel
Shaft bearings High quality shaft bearings (per the manufacturer)

Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 105-106.

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 26000 Series Guide
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