Monarch BE-S75 Series Self Priming Effluent Pumps & Repair Parts
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Monarch BE Series Self-Priming Effluent Pumps & Repair Parts
The Monarch BE Series sets the industry standard for durability and performance in residential and commercial wastewater management. Designed as high-efficiency self-priming effluent pumps, the BE-S33, BE-S50, and BE-S75 models are engineered to handle the toughest drainage challenges. Whether you are managing a septic tank installation, clearing a flooded basement, or handling livestock watering, the BE Series delivers consistent, high-capacity water movement.
Constructed with heavy-duty cast iron and equipped with CSA-approved motors, these pumps are built for continuous duty. This page details the complete technical specifications, performance curves, and a comprehensive catalog of genuine repair parts to keep your system running at peak efficiency.
Key Features and Benefits
- Heavy-Duty Construction: The casing is manufactured from rugged cast iron with a standard 1¼” NPT suction and discharge, ensuring longevity even in harsh operating environments.
- High-Performance Motor: Featuring CSA-approved, continuous-duty rated motors. These units boast a higher-than-NEMA service factor and are dual-compartment equipped with a stainless steel shaft and automatic thermal overload protection to prevent overheating.
- Built-In Check Valve: The integrated check valve facilitates rapid priming and provides essential protection against syphoning action, ensuring the pump is always ready to perform.
- Advanced Impeller Design: Equipped with a 4-vane, semi-open gray cast iron impeller. The unique “Blind Hole” design prevents liquid from contacting the shaft, eliminating corrosion and thread stripping issues.
- Superior Mechanical Seal: Utilizes a Carbon/Ceramic 5/8″ mechanical seal for a watertight, leak-proof operation.
Common Applications
The Monarch BE Series is versatile and capable of handling various fluid transfer tasks, including:
- Septic tank effluent removal
- Flooded basement drainage
- Livestock watering and general dewatering
- Flood irrigation systems
- Excavation dewatering
Technical Specifications & Performance
Performance Chart (Capacities in U.S. GPM)
| Model No. | Total Head in Feet | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | |
| BE-S33 | 36 | 30 | 23 | 16 | 9 | 2 | – | – | – |
| BE-S50 | 45 | 39 | 31 | 24 | 16 | 8 | – | – | – |
| BE-S75 | 58 | 53 | 44 | 36 | 29 | 18 | 10 | 1 | – |
Ordering Information (BE Series)
| Model No. | Order No. | HP | SF | Ship Wt. (lbs.) | Voltage |
|---|---|---|---|---|---|
| BE-S33 | 621805 | 1/3 | 1.95 | 41 | 115 |
| BE-S50 | 621815 | 1/2 | 1.90 | 42 | 115/230 |
| BE-S75 | 621825 | 3/4 | 1.65 | 43 | 115/230 |
Motor Electrical Data
- 1/3 HP (115V): 9.4 full load amps
- 1/2 HP (115/230V): 12.4 / 6.2 full load amps
- 3/4 HP (115/230V): 14.8 / 7.4 full load amps
Dimensions (Inches)
| Model | Suct. NPT | Disch. NPT | Priming Plug NPT | Drain Plug NPT | Slots | A | B | C | D | E | F | G | H | J | K | L | M |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BE-S33 | 1 1/4 | 1 1/4 | 1/2 | 1/2 | .43x.93 | 4.25 | 7.25 | 10 | 4.9 | 6.5 | 7.6 | 14.4 | 3.1 | 4.9 | 5.5 | 6.8 | 3 |
| BE-S50 | 1 1/4 | 1 1/4 | 1/2 | 1/2 | .43x.93 | 4.25 | 7.25 | 10 | 4.9 | 6.5 | 7.6 | 15.3 | 3.1 | 4.9 | 5.5 | 6.8 | 3 |
| BE-S75 | 1 1/4 | 1 1/4 | 1/2 | 1/2 | .43x.93 | 4.25 | 7.25 | 10 | 4.9 | 6.5 | 7.6 | 15.6 | 3.1 | 4.9 | 5.5 | 6.8 | 3 |
Repair Parts List – Type “TM” (BE-S33/S50)
| Ref. # | Code # | Qty. | Description | |
|---|---|---|---|---|
| BE-S33 | BE-S50 | |||
| 1 | 438391 | 1 | 1 | Casing |
| 2 | 438091 | 1 | Impeller | |
| 2 | 438101 | 1 | Impeller | |
| 4 | 438245 | 1 | 1 | Mounting Bracket |
| 5 | 438241 | 1 | 1 | Seal Plate |
| 6 | 438412 | 1 | 1 | Flange |
| 7 | 201056 | 1 | 1 | Check Valve Assembly |
| 9 | 246800 | 1 | 1 | 5″ Edge Trim |
| 21 | 120030 | 4 | 4 | Bolt 3/8 UNC x 1 1/2 |
| 24 | 119780 | 2 | 2 | Bolt 5/16 UNC x 1 |
| 34 | 176540 | 4 | 4 | Spring Washer 3/8 |
| 35 | 174220 | 2 | 2 | Aluminum Washer |
| 38 | 185640 | 2 | 2 | Pipe Plug 1/2 NPT |
| 39* | 193920 | 1 | 1 | Gasket |
| 40* | 191790 | 1 | 1 | Flinger |
| 43 | 438413 | 1 | 1 | Gasket |
| 45 | 240104 | 1 | 1 | Seal 5/8 dia. |
| 50 | 204081 | 1 | 1/3 HP Electric Motor, Sq. Flange | |
| 1 | 1/2 HP Electric Motor, Sq. Flange | |||
Repair Parts List – Type “A” (BE Series)
Model Key:
a= BE33 | b= BE-S33 | c= BE50 | d= BE-S50 | e= BE-S75
BE33-B | BE-S33-B | BE50-B | BE-S50-B | BE-S75-B
BE33-SP | BE-S33-SP | BE50-SP | BE-S50-SP | BE-S75-SP
| Ref. # | Code # | a | b | c | d | e | Description |
|---|---|---|---|---|---|---|---|
| 1 | 204070 | 1 | Motor 1/3 HP C face | ||||
| 1 | 204071 | 1 | Motor 1/3 HP Sq. flange | ||||
| 1 | 204110 | 1 | Motor 1/2 HP C face | ||||
| 1 | 204073 | 1 | Motor 1/2 HP Sq. flange | ||||
| 1 | 204125 | 1 | Motor 3/4 HP Sq. flange | ||||
| 2 | 246800 | 1 | 1 | 1 | 1 | 1 | Edge trim |
| 3 | 438245 | 1 | 1 | 1 | 1 | 1 | Base |
| 4 | 119990 | 4 | 4 | Bolt 3/8 UNC x 3/4 | |||
| 4 | 120030 | 4 | 4 | 4 | Bolt 3/8 UNC x 1 1/2 | ||
| 5 | 175500 | 4 | 4 | Aluminum washer | |||
| 5 | 176230 | 4 | 4 | 4 | Spring washer 3/8 | ||
| 6 | 191790 | 1 | 1 | 1 | 1 | 1 | Flinger |
| 7 | 438240 | 1 | 1 | Seal plate | |||
| 7 | 438241 | 1 | 1 | 1 | Seal plate | ||
| 8 | 240104 | 1 | 1 | 1 | 1 | 1 | Mechanical seal 5/8 I.D. |
| 9 | 438090 | 1 | Impeller 7/16 UNC; .20 vane height | ||||
| 9 | 438092 | 1 | Impeller 1/2 UNC; .20 vane height | ||||
| 9 | 438100 | 1 | Impeller 7/16 UNC; .30 vane height | ||||
| 9 | 438105 | 1 | Impeller 1/2 UNC; .25 vane height | ||||
| 9 | 438106 | 1 | Impeller 1/2 UNC ; .35 vane height | ||||
| 10 | 193920 | 1 | 1 | 1 | 1 | 1 | Gasket |
| 11 | 438390 | 1 | 1 | Casing | |||
| 11 | 438492 | 1 | 1 | 1 | Casing – yellow (B.C. dia. for motor – 7.13) | ||
| 12 | 227810 | 1 | 1 | 1 | 1 | 1 | Nut 1/4 UNC |
| 13 | 238330 | 1 | 1 | 1 | 1 | 1 | Top weight |
| 14 | 194390 | 1 | 1 | 1 | 1 | 1 | Checkvalve |
| 15 | 186540 | 2 | 2 | 2 | 2 | 2 | Pipe plug 1/2 NPT |
| 16 | 438415 | 1 | 1 | 1 | 1 | 1 | Checkvalve body |
| 18 | 174220 | 2 | 2 | 2 | 2 | 2 | Aluminum washer 5/16″ |
| 19 | 119780 | 2 | 2 | 2 | 2 | 2 | Bolt 5/16″ UNC x 1″ |
| 20 | 225720 | 1 | 1 | 1 | 1 | 1 | Bolt 1/4″ UNC x 5/8″ |
Models / Parts with Suffix “-B”
| Ref. # | Code # | Description |
|---|---|---|
| 633738 | 1 | Float switch |
| 435021 | 1 | Cord assembly 8 ft. |
Models / Parts with Suffix “-SP”
| Ref. # | Code # | Description |
|---|---|---|
| 225070 | 1 | Sump pump switch |
| 435021 | 1 | Cord assembly 8 ft. |
| 435022 | 1 | Cord assembly 5 ft. |
| 463763 | 1 | Float Kit |
FAQs
What types of applications is the Monarch BE Series pump suitable for?
The Monarch BE Series is designed for effluent systems, septic tanks, basement drainage, livestock watering, and flood irrigation. Its self-priming capability makes it ideal for dewatering applications.
What voltage options are available for the BE Series pumps?
The BE-S33 (1/3 HP) operates on 115V. The BE-S50 (1/2 HP) and BE-S75 (3/4 HP) models are dual voltage and can operate on either 115V or 230V.
Does the BE Series pump come with thermal overload protection?
Yes, the motors are equipped with automatic thermal overload protection to prevent the motor from overheating during continuous duty operation.
What is the “Blind Hole” impeller design?
The “Blind Hole” design in the semi-open gray cast iron impeller ensures that the liquid being pumped does not come into contact with the motor shaft. This feature protects the shaft from corrosion and prevents thread stripping.