Little Giant magnetic-drive chemical pump 3-MD-SC 115V — 750 GPH, seal-less corrosion-resistant

The Little Giant 3-MD-SC is a 115V, seal-less magnetic-drive chemical pump engineered to move moderately corrosive fluids up to 750 GPH with durable, corrosion-resistant components.

This in-line, non-submersible pump combines glass-filled polypropylene wetted parts with ceramic shaft and thrust washers to resist wear and chemical attack while eliminating dynamic seals. It is designed for installations where semi-corrosive solvents, acids, alkalis and compatible solutions need reliable transfer or recirculation. The compact 1/12 HP motor is open and fan-cooled, thermally protected, and supplied with a 6-foot cord and grounded plug for straightforward hookup.

How does this pump handle corrosive fluids?

The 3-MD-SC uses glass-filled polypropylene for the volute, magnet housing and impeller, providing strong chemical resistance for a wide range of semi-corrosive liquids. A seal-less magnetic drive removes the need for shaft seals that typically fail with aggressive fluids, and ceramic shaft and thrust washers add wear resistance.

• Wetted parts: glass-filled polypropylene to resist many solvents and acids
• Seal-less magnetic drive eliminates mechanical seal leakage
• Ceramic (99.5% alumina) shaft and thrust washers for durability
• Non-rotating washers reduce shaft wear and alignment issues

What are the pump’s performance and plumbing specs?

Rated at up to 750 gallons per hour at a 1-foot head, this unit can achieve a shutdown head near 21.9 feet and handles fluids up to 150°F with specific gravity up to 1.1. The pump requires in-line, below-liquid installation (not self-priming) and uses standard NPT fittings for easy plumbing integration.

• Flow: 750 GPH at 1' head; shutoff about 21.9 ft.
• Intake: 3/4" FNPT; Discharge: 1/2" MNPT
• Fluid limits: specific gravity to 1.1; temperature to 150°F
• Installation: in-line, non-submersible; not self-priming

What motor and electrical features should I expect?

The pump is powered by a 115V, 1/12 HP motor that draws about 2.4 running amps and is thermally protected for safer operation. The motor is open and fan-cooled for heat control during extended runs and comes with a grounded 6-foot power cord for immediate connection to standard outlets.

• Voltage: 115V; Frequency: 60 Hz; Horsepower: 1/12
• Running amps: 2.4; power consumption around 190 watts
• Motor type: open, fan-cooled; thermal overload protection included
• Supplied with 6-foot grounded cord and three-prong plug

Who this is for: The Little Giant 3-MD-SC suits industrial maintenance technicians, lab managers, chemical processing operators, and facilities teams who need a compact, reliable pump for transferring or recirculating semi-corrosive solutions compatible with polypropylene and ceramic components. It works well where a seal-less design is preferred to cut leakage risk and where moderate flow with compact electrical requirements is essential. Note: always verify chemical compatibility with glass-filled polypropylene and alumina ceramics and install the pump below the liquid level since it is not self-priming.