Monarch ESP50AM Series Submersible Effluent Pump
Monarch ESP50 Series: Heavy-Duty Submersible Effluent Pumping
The Monarch ESP50AM Series Submersible Effluent Pump is engineered for superior durability and reliable performance in demanding sump and septic applications. Designed with a hybrid construction, this pump features a rugged cast iron motor housing that effectively dissipates heat, paired with a corrosion-resistant molded polypropylene pump body. This combination ensures a long operational life, even under continuous duty conditions.
With a powerful 1/2 HP motor and the ability to handle 3/4″ spherical solids, the ESP50AM is the ideal solution for moving effluent or groundwater. Whether utilized in a residential basement sump system or a septic effluent system, this pump delivers consistent high-head performance.
Key Features and Benefits
- Rugged Construction: The cast iron motor housing is designed for optimal heat dissipation, preventing overheating, while the molded polypropylene pump body resists corrosion from harsh water conditions.
- High-Performance Motor: Equipped with a 115-volt, CSA-approved “oil-free” motor. It features thermal overload protection and is rated for continuous duty with 6.7 full load amps.
- Superior Impeller Design: The reinforced polypropylene impeller includes a brass insert for stability and durability, specifically engineered to pass 3/4″ spherical solids.
- Quality Components: Built with a stainless steel heat-treated shaft and a Carbon/Ceramic mechanical seal for leak prevention. Upper and lower ball bearings ensure smooth operation.
- Automatic Operation: The ESP50AM model comes with a piggy-back mercury-free mechanical float switch for automatic on/off cycling.
- Easy Installation: Includes a generous 20 ft. power cord and a standard 1 ½” NPT discharge.
- Warranty: Backed by a 2-Year Warranty for peace of mind.
Common Applications
- Effluent Systems: Pumping septic tank effluent to leach fields or mound systems.
- Sump Drainage: Heavy-duty basement dewatering.
- General Dewatering: Moving water containing small solids up to 3/4 inch.
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
- Motor Housing Width: 5.50 inches
- Distance to Center: 3.78 inches
- Discharge Height: 9.13 inches