Monarch WS51 Series Submersible Sewage Pump
Monarch WS51 Series: Heavy-Duty Submersible Sewage Pumping
The Monarch Industries WS51 Series is a rugged 1/2 HP submersible sewage pump designed to handle the tough demands of residential wastewater removal. Part of the renowned WS line, the WS51 distinguishes itself with robust engineering tailored for sewage applications where durability and reliability are non-negotiable.
Robust Cast Iron Construction
Like its counterparts in the WS family, the WS51 Series is built to last. The motor and pump housing are constructed from Cast Iron Class 30, providing superior strength and efficient heat dissipation. This heavy-duty casing protects the internal components from physical damage and ensures the pump remains stable in the pit. The unit is assembled with stainless steel fasteners, ensuring that maintenance and serviceability remain easy throughout the lifespan of the pump, even in corrosive environments.
Powerful 1/2 HP Motor
The WS51 Series utilizes a powerful 1/2 HP motor (Ref Code 223151/223161) designed for high torque and consistent performance. The motor is housed in an oil-filled chamber containing approximately 2.1 liters of dielectric insulating oil. This design not only lubricates the double ball bearings but also ensures optimal heat transfer, preventing the motor from overheating during extended operation cycles.
Serviceable and Reliable Components
The WS51 is designed with the service technician in mind. It features a mechanical carbon/ceramic seal (5/8″ rotary type) to prevent water intrusion and protect the motor. The pump shaft is crafted from 416 stainless steel for maximum corrosion resistance. The WS51 series uses specific impellers (Type B & C) and volutes designed to facilitate the movement of sewage and wastewater effectively.
Automatic and Manual Versatility
The Series is available in both manual (WS51M) and automatic (WS51AM) configurations. Automatic models are typically paired with a reliable float switch to manage water levels autonomously, making them ideal for residential sewage basins.
Key Features
- Motor: 1/2 HP Oil-filled motor for cooler operation and longer life.
- Construction: Heavy-duty Cast Iron Class 30 housing.
- Sealing: Mechanical Carbon/Ceramic seal (5/8″ I.D.) for leak-proof performance.
- Durability: 416 Stainless steel motor shaft and fasteners.
- Configurations: Available in Manual (M) and Automatic (AM) models.
- Voltage: Available in 115V (Type C current) and other configurations as per the parts matrix.
Applications
- Residential Sewage Ejection: Moving wastewater from basement bathrooms to sewer lines or septic tanks.
- Sump Applications: Heavy-duty sump pumping where debris may be present.
- Septic Tank Effluent: Transferring effluent in residential septic systems.
Technical Specifications & Repair Parts
WS51 Series Component Specifications
| Component | Specification / Material |
|---|---|
| Motor Horsepower | 1/2 HP |
| Housing Material | Cast Iron Class 30 |
| Impeller Type | Type B & C (Code 493222) |
| Shaft Material | 416 Stainless Steel |
| Seal Type | Mechanical, 5/8″ I.D. Carbon/Ceramic |
| Insulating Oil Capacity | 2.1 Liters |
| Fasteners | Stainless Steel |
Repair Parts List (Specific to WS51 Series)
Models Included: 51AM, 51M, 51SA, 51SM
| Ref. # | Part Code | Qty Required | Description |
|---|---|---|---|
| 1** | 149413 | 2 | Screw #10 x 3/4 SST |
| 2** | 246331 | 1 | Clamp |
| 3** | 246330 | 1 | Adapter |
| 4 | 198080 | 1 | O-ring 1 3/8 I.D. |
| 5 | 225820 | 10 | Bolt 5/16″ UNC x 1-1/4″ SST |
| 6 | 225076 | 1 | Cord 20 ft. (Type D/E Models) |
| 6** | 255051 | 1 | Cable 20 ft. (Type B Models) |
| 7 | 493541 | 1 | Housing (Cast Iron) |
| 8** | 225055 | 1 | Plug assembly |
| 9 | 223151 | 1 | Motor 1/2 HP (Type B Models) |
| 9 | 223161 | 1 | Motor 1/2 HP (Type D Models) |
| 10 | 110110 | 2 | Bearing |
| 11 | 620581 | 2.1 | Insulating Oil (Liters) |
| 12 | 137911 | 1 | Retaining Ring |
| 13 | 198994 | 1 | O-Ring, Square |
| 14 | 493552 | 1 | Adapter |
| 15 | 240160 | 1 | Mechanical Seal, 5/8″ I.D. |
| 16 | 493222 | 1 | Impeller (Type B & C) |
| 17 | 493555 | 1 | Volute |
| 18 | 144432 | 1 | Screw #10 x 3/8 SST |
| 19 | 116842 | 1 | Clamp |
| 20 | 246316 | 1 | Split Coil Ring, 2.75 O.D. SST |
| 21 | 186220 | 1 | Plug 1/4″ NPT Brass |
**When ordering 149413, 246331, 246330, 225051, or 225055, order 225076 and 493541.
FAQ Section
Q: What is the horsepower of the WS51 Series?
A: The WS51 Series comes standard with a 1/2 HP motor (Part #223151 or #223161 depending on the specific model generation).
Q: What is the difference between WS51M and WS51AM?
A: The “M” stands for Manual operation, requiring an external control or plug-in. The “AM” stands for Automatic operation, which generally implies the unit is set up for use with a float switch for automatic on/off cycling.
Q: Does the WS51 use the same impeller as the WS30?
A: No. According to the parts list, the WS51 uses Impeller Part #493222 (Type B & C), whereas the WS30 uses a different impeller configuration.
Q: How much oil does the WS51 motor chamber require?
A: The WS51 motor chamber requires approximately 2.1 liters of dielectric insulating oil (Part #620581) to ensure proper cooling and lubrication.
Q: Is the housing made of plastic or metal?
A: The WS51 features a rugged Cast Iron Class 30 motor and pump housing, making it significantly more durable than plastic alternatives.