Monarch ESP50AV Series Submersible Effluent Pump
Monarch ESP50AV: Compact Power for Narrow Basins
The Monarch ESP50AV Series Submersible Effluent Pump is the ideal solution for effluent and dewatering applications where space is at a premium. Unlike standard tethered float pumps, the ESP50AV (Order No. 620178) utilizes a reliable vertical float switch, making it perfect for narrow sump pits or septic tanks where a swinging float might get hung up on the basin walls.
Engineered with a hybrid construction, this pump features a rugged cast iron motor housing to efficiently dissipate heat and a corrosion-resistant molded polypropylene pump body. Powered by a continuous-duty, oil-free 1/2 HP motor, the ESP50AV is built to withstand the rigors of daily use while handling spherical solids up to 3/4 inch. Whether you are managing septic effluent or residential sump drainage, this pump delivers consistent performance backed by a 2-year warranty.
Key Features and Construction
- Vertical Float Switch: The “AV” model comes equipped with a vertical float switch, ensuring reliable automatic operation in smaller diameter basins (10″ or wider) without obstruction.
- Solid Handling: Capable of passing 3/4″ spherical solids, making it suitable for effluent and light sewage applications.
- Rugged Motor Housing: The cast iron motor housing draws heat away from the motor, preventing overheating during continuous use.
- Corrosion Resistant: The pump body is crafted from molded polypropylene to resist rust and chemical corrosion.
- Reliable Motor: Features a 115-volt, CSA-approved, thermal overload-protected “oil-free” motor. It runs on a stainless steel heat-treated shaft with upper and lower ball bearings.
- Durable Impeller: Reinforced polypropylene impeller includes a brass insert for added stability and durability.
- Extended Reach: Includes a 20 ft. power cord for easy connection to power sources.
- Standard Discharge: Features a 1 ½” NPT discharge for compatibility with standard piping.
Common Applications
- Narrow Sump Pits: Ideal for basins where tethered floats cannot operate freely.
- Septic Effluent: Pumping liquid waste to leach fields or mound systems.
- Basement Drainage: Reliable protection against flooding.
- General Dewatering: Transferring water containing small solids.
Technical Specifications & Performance
The following tables detail the performance capabilities and specific model configurations for the ESP50 Series.
Performance Chart
| PERFORMANCE CHART | ||||||
|---|---|---|---|---|---|---|
| Model No. | Total Head in Feet | Shut-Off Head (ft.) | ||||
| 5 | 10 | 15 | 20 | 25 | ||
| Capacities in U.S. GPM | ||||||
| ESP50 | – | – | 61 | 51 | 36 | 31 |
Submersible Sump/Effluent Pumps – 1 1/2″
| Model No. | Order No. | SFA | HP | Ship Wt. (lbs.) | Description |
|---|---|---|---|---|---|
| ESP50AM | 620187 | 6.7 | 1/2 | 24 | Automatic, with piggy-back float switch and 20 ft. cord. |
| ESP50AV | 620178 | 6.7 | 1/2 | 24 | Automatic, with vertical float switch, 20ft cord. |
| ESP50M | 620174 | 6.7 | 1/2 | 24 | Manual, with 20 ft. power cord. |
Dimensions
- Total Height: 12.42 inches
- Total Width (Base): 10.00 inches
- Discharge Height: 9.13 inches
- Motor Housing Width: 5.50 inches