A.Y. McDonald · Effluent Pump
Cast Iron Vortex Effluent Pumps, 4/10 to 1/2 HP
Oil-filled cast iron effluent pumps for septic systems, dewatering and elevator pits: 115V or 230V, manual or wide-angle float.
39-48 ft Max Head · 56-64 GPM Max
4/10-1/2 HP
115V or 230V 1Ph
Manual or Wide-Angle Float
3/4 in Solids
2 in NPT Discharge
Cast Iron, Oil-Filled Motor
20 ft Cord
29-38 lb Weight
What Ships and What It Needs to Run
Included: the cast iron pump with oil-filled motor, 20 ft quick-disconnect cord and, on the A models, a wide-angle piggyback float switch.
Float or control panel required on manual models, ordered separately. Use a piggyback float such as the Pumpmaster or Verticalmaster, or a control panel.
Sized at install: pump tank or basin, check valve and discharge pipe.
Overview
These submersible pumps handle up to 3/4 in solids with a 2 in FNPT discharge, for dewatering, septic systems, residential and commercial developments, and elevator pits. Heads reach 48 ft and flows 65 GPM.
Manual or float? Manual models have no switch: they run from a piggyback float switch plugged in behind the pump cord, or from a control panel. Wide-angle float models carry their own float. The piggyback design means a defective switch can be replaced without replacing the pump.
-
Oil-filled PSC motor — upper and lower ball bearings, internal thermal overload, constant bearing lubrication.
-
Type 21 inboard seal with secondary exclusion seal; lasts longer if the pump runs dry.
- Non-clog cast iron vortex impeller.
-
Sealed-entry quick disconnect cord — replaceable in the field.
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.
1-Year A.Y. McDonald Warranty
Covered for 1 year from the date of installation, or 2 years from the date of manufacture, whichever comes first under Baker Manufacturing’s published limited warranty (A.Y. McDonald Pumps & Accessories price list, effective 7/1/26). 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
Single pump. For heads above 48 ft see the 1/2 to 2 HP high head effluent pumps.
Models & Ratings (60 Hz)
| Model |
Part No. |
HP |
Volts |
Amps |
Switch |
Max Head |
Max Flow |
Weight |
| 404011EF |
6191-000 |
4/10 |
115 |
6.6 |
Manual |
39 ft |
56 GPM |
29 lb |
| 404011EFA |
6191-001 |
4/10 |
115 |
6.6 |
Wide-Angle Float |
39 ft |
56 GPM |
31 lb |
| 404012EF |
6191-012 |
4/10 |
230 |
3.3 |
Manual |
39 ft |
56 GPM |
37 lb |
| 404012EFA |
6191-013 |
4/10 |
230 |
3.3 |
Wide-Angle Float |
39 ft |
56 GPM |
38 lb |
| 405011EF |
6191-002 |
1/2 |
115 |
8.5 |
Manual |
48 ft |
64 GPM |
36 lb |
| 405011EFA |
6191-003 |
1/2 |
115 |
8.5 |
Wide-Angle Float |
48 ft |
64 GPM |
38 lb |
| 405012EF |
6191-004 |
1/2 |
230 |
4.3 |
Manual |
48 ft |
64 GPM |
36 lb |
| 405012EFA |
6191-005 |
1/2 |
230 |
4.3 |
Wide-Angle Float |
48 ft |
64 GPM |
38 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?
| Flow, GPM → |
0 |
10 |
20 |
30 |
40 |
50 |
60 |
| A: 404011EF/A, 404012EF/A |
39 |
35 |
32 |
28 |
22 |
14 |
— |
| B: 405011EF/A, 405012EF/A |
48 |
44 |
40 |
37 |
31 |
22 |
13 |
Total head in feet at each flow, digitized from the published curve in the A.Y. McDonald Pumps by Baker catalog, rev 3/26, p. 326, and rounded down. A dash is beyond the end of the published curve.
Before You Buy — The Limits That Decide the Fit
| Water |
Effluent, gray water and drainage with up to 3/4 in solids. Not for raw sewage. |
| Head |
Up to 39 ft (4/10 HP) or 48 ft (1/2 HP). |
| Power |
115V or 230V single phase, per the model. |
| Switch |
Manual models need a piggyback float or a control panel. |
| Temperature |
140°F intermittent. |
| Pairing |
Single pump. |
Materials of Construction
| Discharge |
2 in NPT, vertical |
| Solids |
3/4 in |
| Liquid temperature |
140°F (intermittent) |
| Motor housing, volute, seal plate |
Cast iron |
| Impeller |
Cast iron vortex |
| Shaft |
Stainless steel |
| Shaft seal |
Inboard mechanical with secondary exclusion V-seal; carbon / ceramic, Buna-N, 300 series stainless hardware |
| Bearings |
Single row ball, oil lubricated, upper and lower |
| Hardware |
300 series stainless steel |
| O-rings |
Buna-N |
| Cord |
20 ft standard, sealed-entry quick disconnect; up to 100 ft available |
Accessories
| Accessory |
Code |
Description |
| Pumpmaster float switch |
6190-012 and others |
Wide-angle piggyback float, to 1/2 HP at 120V, 1 HP at 230V |
| Verticalmaster float switch |
6190-020 |
Vertical piggyback float for narrow basins |
