A.Y. McDonald · Effluent Pump End
Thermoplastic High Head Effluent Pump Ends
Replacement pump ends for the 10, 20 and 30 GPM thermoplastic multistage effluent pumps, matched to a 1/2 to 1-1/2 HP Baker 4 in motor.
10, 20 or 30 GPM Nominal
For 1/2-1-1/2 HP 4 in Motors
1-1/4 in FNPT Discharge
Stainless Steel Shell and Shaft
4-9 lb Weight
What Ships and What It Needs to Run
Included: the thermoplastic multistage pump end.
Motor required, ordered separately. A 4 in Baker submersible motor of the HP shown; the complete pumps are listed separately.
Overview
The pump end of the A.Y. McDonald thermoplastic high head effluent pumps: stainless steel shell and shaft, reinforced thermoplastic diffusers and impellers, thermoplastic intake screen and a 1-1/4 in FNPT discharge. Match the pump end HP to the motor.
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.
3-Year A.Y. McDonald Warranty
Covered for 3 years from the date of manufacture under Baker Manufacturing’s published limited warranty (A.Y. McDonald Pumps & Accessories price list, effective 7/1/26). This is Baker’s term for assembled submersible pumps with Baker motors up to 80 GPM pump ends. Per Baker’s terms, the warranty does not cover failure caused by sand or abrasive materials in the water.
Outgrow It and You Don’t Replace It
Models & Ratings (60 Hz)
| Model |
Part No. |
Nominal Flow |
HP |
Weight |
| 22050KAJ |
6634-147 |
10 GPM |
1/2 |
5 lb |
| 22075KJ |
6634-292 |
10 GPM |
3/4 |
6 lb |
| 22100KJ |
6634-293 |
10 GPM |
1 |
7 lb |
| 22150KJ |
6634-294 |
10 GPM |
1-1/2 |
9 lb |
| 22050PAJ |
6634-182 |
20 GPM |
1/2 |
5 lb |
| 22075PJ |
6634-295 |
20 GPM |
3/4 |
6 lb |
| 22100PJ |
6634-296 |
20 GPM |
1 |
7 lb |
| 22150PJ |
6634-297 |
20 GPM |
1-1/2 |
8 lb |
| 22050EJ |
6634-258 |
30 GPM |
1/2 |
4 lb |
| 22075EJ |
6634-260 |
30 GPM |
3/4 |
5 lb |
| 22100EJ |
6634-262 |
30 GPM |
1 |
6 lb |
| 22150EJ |
6634-264 |
30 GPM |
1-1/2 |
6 lb |
Source: A.Y. McDonald Pumps by Baker catalog, rev 3/26, and Pumps & Accessories price list, effective 7/1/26.
Performance — Will It Do What You Need?
Performance is that of the complete pump of the same model family; see the 10, 20 and 30 GPM thermoplastic high head effluent pump listings.
Before You Buy — The Limits That Decide the Fit
| Motor |
Match the pump end HP to a 4 in Baker motor. |
| Water |
Screened septic effluent. |
Materials of Construction
| Shell and shaft |
Stainless steel |
| Diffusers and impellers |
Reinforced thermoplastic |
