Description
1/2 HP Cast Iron Sewage Ejector Pump for Heavy-Duty Residential and Commercial Wastewater Applications
This Hydromatic SK50 sewage pump efficiently manages heavy wastewater in homes and businesses. You can rely on this submersible cast-iron sewage pump for underground sewage basins and septic systems. The Hydromatic 1/2 HP sewage pump effectively moves water and waste to municipal sewer lines or drain fields.
Quick Specs
- Horsepower: 1/2 HP
- Voltage: 115V
- Discharge Size: 2" NPT
- Solids Handling: 2"
- Cord Length: 20 ft
- Max Head: 22 ft
- Flow Rate: 80 GPM
Key Features of Hydromatic SK50A1 20 Sewage Ejector Pump
- The two-vane semi-open cast iron impeller effortlessly passes spherical materials up to two inches in diameter.
- Class 30 cast iron body construction delivers exceptional durability and long-lasting wear resistance for heavy-duty applications.
- An oil-filled motor with upper and lower single-row ball bearings reduces friction and extends the operational lifespan.
- Automatic thermal overload protection prevents overheating and automatically resets to keep your system operating safely.
- The 20-foot wide-angle tethered float switch with a piggyback plug allows straightforward installation and simple manual operation testing.
Hydromatic SK50 Sewage Ejector Pump Specifications
| Category | Details |
|---|---|
| Pump Type | Submersible Sewage Ejector Pump |
| Model Number | SK50A1 20 (Part # 516540127) |
| Horsepower | 1/2 HP |
| Voltage | 115V |
| Phase | 1 |
| Frequency | 60 Hz |
| Amp Draw (Full Load) | 12 Amps |
| Speed | 1750 RPM |
| Maximum Capacity | 80 GPM |
| Maximum Head | 22 Feet |
| Maximum Liquid Temperature | 130°F (55°C) |
| Agency Listing | CSA and cUL |
| Warranty | 1 Year Limited |
Performance Overview
The Hydromatic delivers a maximum capacity of 80 GPM and a maximum head of 22 feet, making it a highly capable commercial wastewater ejector pump.
Pump Performance – Head (ft) vs Flow Rate (GPM)
| Flow Rate (GPM) | Head (ft) |
|---|---|
| 0 | 24 |
| 20 | 22 |
| 40 | 19 |
| 60 | 16 |
| 80 | 14 |
| 100 | 12 |
| 110 | 9 |
Construction & Design
| Category | Details |
|---|---|
| Body Construction | Class 30 Cast Iron |
| Impeller Type | Two Vane Semi-Open Cast Iron |
| Motor Type | Oil-Filled PSC with Thermal Overload |
| Shaft Seal | Carbon/Ceramic Type 21 |
| Bearings | Upper and Lower Single Row Ball Bearings |
| Switch Type | Wide Angle Tethered Float (20-Ft Cable) |
| Discharge Size | 2" NPT |
| Solids Handling | 2" Spherical |
| Cord Type | 20-Ft SJTW (16/3) |
Applications
- Residential sewage ejector systems
- Commercial wastewater management
- Septic tank effluent pumping
- High-capacity sump pit drainage
- Underground basement wastewater transfer
- Heavy-duty 2-inch solid handling wastewater pump applications
Explore More Sewage Pump Solutions
- Hydromatic Pumps Collection – View all Hydromatic brand pumps.
- Sewage Pumps Collection – Explore more sewage pump models.
- Sewage Pump Accessories – Find accessories and components.
Why Choose the Hydromatic SK50A1 20 Sewage Ejector Pump
Buy a Hydromatic SK50A1 20 sewage ejector pump when you need a dependable Hydromatic SK50 replacement sewage pump 120V or 115V system. This robust 2-inch solid handling sewage pump provides reliable automatic operation for years of use.
Available through Cleanflow, a trusted Hydromatic pumps supplier across Canada and the USA.
Frequently Asked Questions
What size solids can this pump handle?
It can handle solids up to 2 inches in diameter.
Can I use this for high-temperature liquids?
The maximum liquid temperature is 130°F (55°C).
How does the piggyback float switch work?
It allows automatic operation based on water levels and manual testing when needed.
Is this a suitable direct replacement pump?
Yes, it can replace identical models including Myers MSK50A1 20.
What pipe size do I need for installation?
It requires a 2" NPT discharge connection.
Does this pump require a dedicated circuit?
Yes, it requires a properly grounded 115V outlet.
How do I maintain the pump if it sits idle?
Run the pump monthly to ensure proper operation.
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