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Included: the pump end and Baker 4 in motor, assembled, with the AutoDRIVE constant pressure drive matched to the motor, and the pressure switch (APS models) or pressure transducer with 10 ft wire (APT models). The drive model for each build is in the Models table.
Power: 230V single-phase supply from a circuit breaker for every build; the three-phase builds take single-phase power and the drive makes three-phase for the motor. Breaker sizes are under Before You Buy.
Sized at install: drop cable, splice kit and the pressure relief valve shown in the manufacturer’s installation diagram.
The AutoPAC is Baker’s constant pressure well package: a 24000 Series 4 in submersible pump, a Baker motor of the same horsepower, and the AutoDRIVE variable frequency drive. The drive holds a set pressure by changing the pump speed, which allows a smaller pressure tank and a quick, simple installation; setup takes 5 steps or less on the drive’s backlit display.
This listing is the J - 5 GPM class: 1/2 to 1 1/2 HP, with pressure switch and transducer control. The AutoDRIVE is American made and housed in a NEMA 3R steel enclosure rated for outdoor use.
Pump and motor: covered for 5 years from the date of manufacture in potable water applications, and 3 years from the date of manufacture in other applications, under A.Y. McDonald’s published terms for Baker submersible motors and assembled submersible pumps. The AutoDRIVE and pressure control fall under A.Y. McDonald’s standard limited warranty: 2 years from the date of manufacture or 1 year from installation, whichever comes first.
One pump and one drive per well. Need more head later? Step up in horsepower within the J - 5 GPM class; the drive model changes with the motor (see the Models table). Need more flow? Move to a higher flow class of the AutoPAC 24000 Series; every class uses the same 1 1/4 in NPT discharge.
| Model | Part No. | HP | Motor | Control | AutoDRIVE | Head at 5 GPM | Shut-off Head | Weight |
|---|---|---|---|---|---|---|---|---|
| 24050J2-APS | 6630-701 | 1/2 | 230V 1Ph 2-Wire | Pressure Switch | SD1-2HP2PS | 217 ft | 376 ft | 43 lb |
| 24050J2-APT | 6630-696 | 1/2 | 230V 1Ph 2-Wire | Transducer | SD1-2HP2 | 217 ft | 376 ft | 43 lb |
| 24050J3-APS | 6630-745 | 1/2 | 230V 1Ph 3-Wire | Pressure Switch | SD1-2HP2PS | 217 ft | 376 ft | 41 lb |
| 24050J3-APT | 6630-740 | 1/2 | 230V 1Ph 3-Wire | Transducer | SD1-2HP2 | 217 ft | 376 ft | 41 lb |
| 24075J2-APS | 6630-711 | 3/4 | 230V 1Ph 2-Wire | Pressure Switch | SD1-2HP2PS | 287 ft | 481 ft | 46 lb |
| 24075J2-APT | 6630-706 | 3/4 | 230V 1Ph 2-Wire | Transducer | SD1-2HP2 | 287 ft | 481 ft | 46 lb |
| 24075J3-APS | 6630-755 | 3/4 | 230V 1Ph 3-Wire | Pressure Switch | SD1-2HP2PS | 287 ft | 481 ft | 46 lb |
| 24075J3-APT | 6630-750 | 3/4 | 230V 1Ph 3-Wire | Transducer | SD1-2HP2 | 287 ft | 481 ft | 43 lb |
| 24100J2-APS | 6630-722 | 1 | 230V 1Ph 2-Wire | Pressure Switch | SD1-2HP2PS | 382 ft | 641 ft | 53 lb |
| 24100J2-APT | 6630-716 | 1 | 230V 1Ph 2-Wire | Transducer | SD1-2HP2 | 382 ft | 641 ft | 53 lb |
| 24100J3-APS | 6630-766 | 1 | 230V 1Ph 3-Wire | Pressure Switch | SD1-2HP2PS | 382 ft | 641 ft | 52 lb |
| 24100J3-APT | 6630-760 | 1 | 230V 1Ph 3-Wire | Transducer | SD1-2HP2 | 382 ft | 641 ft | 52 lb |
| 24150J2-APS | 6630-734 | 1 1/2 | 230V 1Ph 2-Wire | Pressure Switch | SD1-2HP2PS | 508 ft | 822 ft | 62 lb |
| 24150J2-APT | 6630-728 | 1 1/2 | 230V 1Ph 2-Wire | Transducer | SD1-2HP2 | 508 ft | 822 ft | 62 lb |
| 24150J3-APS | 6630-778 | 1 1/2 | 230V 1Ph 3-Wire | Pressure Switch | SD1-2HP2PS | 508 ft | 822 ft | 61 lb |
| 24150J3-APT | 6630-772 | 1 1/2 | 230V 1Ph 3-Wire | Transducer | SD1-2HP2 | 508 ft | 822 ft | 61 lb |
| 24150J3Z-APT | 6630-855 | 1 1/2 | 230V 3Ph | Transducer | SD3-2HP2 | 508 ft | 822 ft | 54 lb |
Head at 5 GPM is read from the published AutoPAC curve (Pumps by Baker catalog (Sept 2025, rev 3/26), p. 146), digitized and rounded down. Shut-off head as printed. Drive per the compatibility table on p. 141 (1 1/2 HP three-phase builds use the SD3-2HP2). Sources: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 141-143 and 146; Baker Pumps and Accessories price list, effective 7/1/2026.
| Included | Pump end, Baker 4 in motor, AutoDRIVE drive, and pressure switch or transducer |
| Discharge | 1 1/4 in NPT (female) |
| Check valve | Built in |
| Supply | 230V single-phase, 60 Hz |
| Motor | Baker 4 in submersible motor, matched to the pump end horsepower |
| Pump diameter | 3 3/4 in with cable guard |
| Drive enclosure | NEMA Type 3R steel, 12.25 x 9.25 x 4.68 in, 13 lb |
| Drive operating temperature | -4 to 122°F; SD3-5HP2 rated to 104°F |
| Drive efficiency | 95% |
| Certification (pump) | Drinking Water ANSI/NSF 61 |
| App connection | None; set up on the drive display |
Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 131-133 and 141-143.
Total head is everything the pump lifts against: the vertical lift from the pumping water level to the discharge, the pressure you set on the drive (2.31 ft for every PSI), and friction in the drop pipe. The drive slows the pump when demand falls, so the curve below is the most the pump delivers at full speed.
Total head in feet, by flow in GPM, at full speed
| HP (stages) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|
| 1/2 HP (12) | 379 | 355 | 328 | 295 | 258 | 217 | 171 | 120 | 65 |
| 3/4 HP (15) | 484 | 460 | 430 | 391 | 343 | 287 | 223 | 151 | 70 |
| 1 HP (20) | 642 | 612 | 571 | 519 | 456 | 382 | 296 | 200 | 92 |
| 1 1/2 HP (26) | 823 | 790 | 743 | 680 | 602 | 508 | 398 | 272 | 131 |
Digitized from the published AutoPAC curve in the Pumps by Baker catalog (Sept 2025, rev 3/26), p. 146, and rounded down. Rated flow (5 GPM) in bold. Zero flow is the shut-off point, a ceiling rather than a working point; — marks flows past the end of that curve.
Best operating range: the published curve shades the most efficient operating range; the catalog prints no figures for it. The curve is in the image gallery.
| Supply | 230V single-phase for every build, from a circuit breaker sized per the table below |
| Pressure transducer | Must be installed upright and vertical (manufacturer note) |
| Drive location | NEMA 3R enclosure, outdoors or indoors; rated to 122°F (104°F for SD3-5HP2); derate above 5500 ft |
| Motor cooling | 1.0 ft/sec of water flow past the motor at 95°F; motor rated to 95°F water |
| Well size | 4 in casing and larger |
| Pairing | One pump and one drive per well |
Breaker sizing by motor HP (manufacturer recommendation)
| Supply | Motor HP | Input Current | Fuse / Breaker |
|---|---|---|---|
| 230V | 1/2 | 6 A | 10 A |
| 230V | 3/4 | 9 A | 15 A |
| 230V | 1 | 14 A | 20 A |
| 230V | 1 1/2 | 18 A | 25 A |
| 230V | 2 | 28 A | 35 A |
| 230V | 2 | 20 A | 25 A |
| 230V | 3 | 30 A | 40 A |
| 230V | 5 | 42 A | 55 A |
Source: Pumps by Baker catalog (Sept 2025, rev 3/26), p. 131.
| Discharge head | Stainless steel 304, 1 1/4 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 | Thermoplastic |
| Shaft | Stainless steel 304 |
| Cable guard | Stainless steel 304 |
Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 65-66.
| Part | Part No. |
|---|---|
| AutoDRIVE pressure transducer with 10 ft wire | 6619-028 |
| AutoDRIVE pressure switch with wire | 6619-029 |
| AutoDRIVE keypad | 6619-030 |
Source: Pumps by Baker catalog (Sept 2025, rev 3/26), pp. 142-143.
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