✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
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.
✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
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