Liberty LCU-N20ST 115 Volt Neutralizing Condensate Pump

The Liberty LCU-N20ST is a specialized condensate pump designed for **neutralizing acidic condensate** from high-efficiency furnaces, boilers, and water heaters, while also handling non-acidic condensate from A/C, dehumidifiers, and ice machines. It features a **built-in safety switch**, dual inlet paths, and a replaceable **magnesium oxide media cartridge** to protect plumbing and the environment. 

Key Features & Benefits

• Neutralizer Media Cartridge — granular magnesium oxide ) raises pH of acidic condensate before discharge.
• Dual Inlet Options — three standard 1" inlets for non-acidic sources, plus a dedicated 1" and ¾" inlet for acidic condensate to prolong media life. 
• Built-In Overflow Safety Switch — helps prevent overflows if tubing becomes blocked or pump fails
• High-Impact ABS Tank — durable and corrosion-resistant housing. 
• 3/8" Barbed / Threaded Discharge — simple connection to tubing (barbed) or threaded plumbing.
• Removable Check Valve — for easy servicing or replacement. 
• Fully Automatic & Quiet — thermally protected motor; vibration isolation pads included. 
• Includes 20 ft Tubing — ready for field installation.

Specifications

Model	LCU-N20ST
Horsepower / Volts / Amps	1/30 HP, 115 V, 1.5 A
Max Fluid Temp	150 °F (65.5 °C)
Max Head / Lift	20 ft
Reservoir Capacity	2 US quarts
Weight	Approx. 11 lbs
Dimensions (H × L × W)	6.5 × 19× 5

Applications & Use Cases

• Neutralizing and discharging acidic condensate from high-efficiency furnaces, boilers, or water heaters (up to 500,000 BTU input) 
• Handling non-acidic condensate from air conditioners, dehumidifiers, ice machines via separate inlets 
• Residential or light commercial HVAC systems where plumbing compatibility and pH protection are required

Installation & Maintenance Tips

• Mount level on a wall or surface beneath the condensate source with access to inlets. 
• Use the proper inlets: acid condensate should go into the dedicated inlet, while non-acidic condensate may use the general inlets. 
• Check and replace the neutralizer media cartridge (part # K001898) annually or when outlet pH drops below ~5.0. 
• Inspect check valves, tubing, and inlets for blockages regularly. 
• If installed in freezing environments, drain lines and pump unit when idle. 

Note: Specifications are subject to change—always refer to the official Liberty Pumps documentation and installation manual for the most up-to-date data.