Taco 131 Series 100 Cast Iron Three-Piece Circulating Pump 1/3HP

Circulate commercial heating water with Taco 131 Series 100 three-piece circulating pump for heavy-duty closed-loop HVAC systems. Its 1/3 HP, 115-volt single-phase motor runs at 1,725 RPM and delivers up to 82 GPM with 30 feet of maximum head. The universal two-bolt flange accepts 3/4-inch through 1-1/2-inch connections. Confirm pipe size, flange fit, system curve, and service clearance before installation.

The Taco 131 uses a cast-iron casing, non-metallic polymer impeller, hardened alloy-steel shaft, and two-piece carbon/ceramic mechanical seal. Its ODP motor is oil-lubricated and drives the pump through a spring-coupled direct-drive arrangement. Sleeve bearings are Babbitt lined, while automatic reset overload protects the 115-volt motor. The supplied data also lists 125 psi maximum pressure, 240°F maximum fluid temperature, 8-1/2-inch flange-to-flange length, and 27 pounds dry weight.

Key Features & Benefits

• 1/3 HP Single-Phase Motor: Fits heavy-duty closed-loop HVAC systems using verified 115-volt service.
• 82 GPM Maximum Flow: Provides a stated capacity reference for commercial heating-system selection.
• 30 Feet Maximum Head: Helps contractors compare piping resistance and elevation requirements against the pump curve.
• Universal Two-Bolt Flange: Accepts listed 3/4-inch, 1-inch, 1-1/4-inch, and 1-1/2-inch connection sizes.
• Oil-Lubricated ODP Motor: Requires attention to lubrication condition during scheduled pump maintenance.
• Automatic Reset Overload: Provides listed motor protection for the single-phase configuration.
• 8-1/2-Inch Flange-to-Flange Length: Helps verify replacement fit in an existing piping run.
• 27-Pound Dry Weight: Assists handling and pipe-support planning during installation.

Why Choose Taco 131

The Taco 131 combines a compact three-piece design with broad flange-size compatibility and published flow and head limits. It suits commercial heating systems where a serviceable 115-volt circulator must fit an existing hydronic piping layout.

• Build: Cast iron, polymer, hardened alloy steel, and carbon/ceramic components define the supplied pump assembly.
• Value: Universal flange sizing can reduce connection changes during replacement, while oiling remains part of routine service.
• Audience: Fits boiler technicians, HVAC contractors, commercial plumbers, and facility maintenance teams.

Applications & Use Cases

Use this pump in heavy-duty closed-loop HVAC and high-flow commercial heating systems within the listed 82 GPM and 30-foot limits. Check the selected flange size, 8-1/2-inch flange-to-flange length, pipe supports, valve clearance, oiling access, and 27-pound handling requirement. Keep fluid conditions within 40°F to 240°F and system pressure below 125 psi.

Warranty & Support

• Warranty Terms: Warranty duration, coverage, exclusions, and registration requirements require confirmation from the authorized seller.
• Service Requirements: Confirm whether authorized service is required for warranty claims before purchase.
• Model Verification: Match Taco 131, 1/3 HP, single-phase configuration, and SKU 131 to the seller’s order documentation.

Verify 115-volt service, select the correct universal flange size, inspect the carbon/ceramic seal, check oil condition, purge air, and confirm the pump is supported without pipe strain. Compare the operating point with the system curve before startup. Purchase the Taco 131 Series 100 three-piece circulating pump at Mulmotor.com for genuine equipment, applicable warranty coverage, and pump support.