Monarch B50S Utility Transfer Pump & Repair Parts
Monarch B50S Utility Transfer Pump & Genuine Repair Parts
The Monarch B50S Utility Transfer Pump is engineered for professionals and homeowners who demand reliability in water transfer applications. Constructed from durable cast iron, this self-priming unit is built to withstand rigorous use while delivering exceptional performance. Whether you are draining a pool, emptying a sump, or transferring water for irrigation, the B50S provides the power and longevity required for the job.
Model 621814 is designed with simplicity and efficiency in mind. It features a built-in suction check valve that ensures rapid self-priming once the casing is initially filled with water. Powered by a high-performance 1/2 HP electric motor, this pump exceeds standard NEMA service factors, offering dual-compartment reliability and industry-standard configuration.
Key Features
- Rugged Construction: The casing is manufactured from heavy-duty cast iron, featuring a large chamber that facilitates rapid self-priming and long-term durability.
- High-Performance Motor: Equipped with a reliable 1/2 HP industry-standard motor. It boasts a service factor higher than NEMA standards and includes an 8-foot power cord for easy connectivity.
- Self-Priming Design: Includes a built-in suction check valve designed to prime itself quickly after the initial fill, ensuring immediate operation.
- Semi-Open Impeller: The cast iron semi-open impeller is designed to handle water efficiently while resisting clogging.
- Ready to Use: The package includes a carrying handle, power cord, and a garden hose adapter for immediate setup.
- Dual Voltage Capability: Electrical characteristics allow for 115/230V capacitor start operation (factory settings apply).
Common Applications
The Monarch B50S is a versatile “workhorse” pump suitable for a wide variety of water transfer tasks, including:
- Draining flooded basements or construction sites.
- General water transfer and dewatering.
- Lawn and garden sprinkler systems.
- Sump and sewage water removal (clean liquids).
- Utility maintenance and emergency water removal.
Technical Specifications
Below are the detailed performance metrics and dimensional specifications for the Monarch B50S.
Performance Chart
| Model No. | RPM | HP | Total Head in Feet (Capacities in U.S. GPM) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |||
| B50S | 3450 | 1/2 | 45 | 31 | 16 | 0 | – | – | – | – |
Electric Motor Driven Specifications
| Model No. | Order No. | HP | Suct. NPT | Disch. NPT | Electrical Characteristics | Ship Wt. (lbs.) |
|---|---|---|---|---|---|---|
| *B50S | 621814 | 1/2 | 1 1/4″ | 1 1/4″ | 1/60/115/230 Capacitor start | 43 |
Dimensions
| Model | Length | Width | Height | HS | Ship Wt. (lbs.) |
|---|---|---|---|---|---|
| B50S | 7.5 | 9.87 | 7.62 | 4.3 | 43 |
*Dimensions measured in inches.
Repair Parts List (B50S Series)
| Ref. # | Code # | Qty. (A) | Description |
|---|---|---|---|
| 1 | 438492 | 1 | Casing – yellow |
| 2 | 438105 | 1 | Impeller |
| 4 | 438245 | 1 | Mounting Bracket |
| 5 | 438241 | 1 | Seal Plate |
| 6 | 438415 | 1 | Check Valve |
| 7 | 238330 | 1 | Top Weight |
| 8 | 175000 | 1 | Washer 1/4 ID |
| 9 | 246801 | 1 | End Cap |
| 21 | 120030 | 4 | Bolt 3/8 UNC x 1 1/2 |
| 24 | 119780 | 2 | Bolt 5/16 UNC x 1 |
| 25 | 225720 | 1 | Bolt 1/4 UNC x 5/8 |
| 29 | 227810 | 1 | Nut 1/4 UNC |
| 34 | 176540 | 4 | Spring Washer 3/8 |
| 35 | 174220 | 2 | Aluminum Washer |
| 38 | 185640 | 2 | Pipe Plug 1/2 NPT |
| 39 | 193920 | 1 | Gasket |
| 40 | 191790 | 1 | Flinger |
| 43 | 194390 | 1 | Valve Rubber |
| 45 | 240104 | 1 | Seal 5/8 Type A |
| 45 | 240316 | 1 | Seal 5/8 Type B |
| 49 | 438247 | 1 | Handle |
| 50 | 204073 | 1 | Electric Motor 1/2 HP |
| 55 | 224965 | 1 | Cord Assy. |