A.Y. McDonald · Cistern Pump
Bottom Suction Cistern Pump
Bottom suction submersible pump for cisterns and tanks, 1/2 to 3/4 HP, 115V or 230V two-wire.
111-133 ft at 15 GPM
1/2-3/4 HP
115V or 230V 1Ph
1 1/4 in Discharge
Passes Solids to 1/8 in
Vertical or Horizontal Install
CSA Listed
19-23 lb Weight
What Ships and What It Needs to Run
Included: the Bottom Suction-Cistern pump, two-wire, with its motor. The 1/2 HP 115V build (22050L2AB) includes a 115 volt grounded plug.
Two-wire motor: the controls are in the motor, so no control box is needed.
Discharge piping: sized to your installation and ordered separately.
Overview
The Baker Bottom Suction-Cistern Pump is built for clear water, gray water and filtered effluent service. Its bottom suction design draws a cistern or tank down as far as possible without shortening the pump’s life, and it passes solids up to 1/8 in.
It suits agricultural, residential and commercial installations: rain water collection, ponds, cisterns for clean or dirty water, potable water and dirty water applications. It installs vertically or horizontally, runs quietly, and is corrosion resistant.
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.
5-Year A.Y. McDonald Warranty in Potable Water
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 (pump ends up to 25 GPM for the 5-year term, up to 80 GPM for the 3-year term).
Room to Grow
One pump per cistern or tank. Need more head later? The 3/4 HP build delivers 133 ft at 15 GPM against 111 ft for the 1/2 HP, and both use the same 1 1/4 in discharge, so the piping stays as it is.
Models & Ratings (60 Hz)
| Model |
Part No. |
HP |
Power |
Head at 15 GPM |
Weight |
| 22050L2AB |
6634-284 |
1/2 |
115V 1Ph 2-Wire |
111 ft |
19 lb |
| 22050L2B |
6634-289 |
1/2 |
230V 1Ph 2-Wire |
111 ft |
19 lb |
| 22075L2AB |
6634-285 |
3/4 |
115V 1Ph 2-Wire |
133 ft |
23 lb |
| 22075L2B |
6634-290 |
3/4 |
230V 1Ph 2-Wire |
133 ft |
23 lb |
Head at 15 GPM is read from the published curve (Pumps by Baker catalog (Sept 2025, rev 3/26), p. 119), digitized and rounded down. Weight is the assembled pump. Sources: Pumps by Baker catalog (Sept 2025, rev 3/26), p. 119; Baker Pumps and Accessories price list, effective 7/1/2026.
Shared Specifications
| Included |
Pump and two-wire motor; grounded 115V plug on 22050L2AB |
| Discharge |
1 1/4 in |
| Solids handling |
Up to 1/8 in |
| Installation |
Vertical or horizontal |
| Run current |
10.5 A (1/2 HP 115V), 12 A (3/4 HP 115V), 4.8 A (1/2 HP 230V), 6.6 A (3/4 HP 230V) |
| Certification |
CSA listed |
| Frequency |
60 Hz |
| App connection |
None |
Source: Pumps by Baker catalog (Sept 2025, rev 3/26), p. 119.
Performance — Will It Do What You Need?
Total head is everything the pump lifts against: the vertical lift from the pumping water level to the discharge, the pressure you want at the tank (2.31 ft for every PSI), and friction in the drop pipe. Find your total head in the row for your horsepower; the column gives the flow.
Total head in feet, by flow in GPM
| HP |
0 |
2.5 |
5 |
7.5 |
10 |
12.5 |
15 |
17.5 |
20 |
22.5 |
25 |
| 1/2 HP |
164 |
158 |
152 |
145 |
136 |
124 |
111 |
95 |
79 |
64 |
49 |
| 3/4 HP |
197 |
190 |
183 |
174 |
164 |
150 |
133 |
114 |
95 |
78 |
59 |
Digitized from the published curve in the Pumps by Baker catalog (Sept 2025, rev 3/26), p. 119, and rounded down. Rated flow (15 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 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
| Application |
Cisterns and tanks: clear water, gray water and filtered effluent; passes solids up to 1/8 in |
| Installation |
Vertical or horizontal |
| Power |
115V or 230V single phase, two-wire; the 1/2 HP 115V build has a grounded plug |
| Pairing |
One pump per cistern or tank |
