Taco 121D Series 100 Stainless Steel Pump 1/4HP 115v

Taco 121D Series 100 Stainless Steel 1/4HP

The Taco 121D is a high-performance, three-piece circulator featuring a stainless steel mechanical housing for open-loop and potable water applications. The “D” designation indicates a specific impeller trim or housing configuration optimized for domestic water recirculation. The mechanical design leverages the classic sleeve-bearing architecture, providing silent operation while the stainless steel volute prevents the oxidation and scaling common in oxygen-rich water. Its back pull-out capability allows for easy inspection of the impeller and mechanical seal.

Featuring a 1/4 HP 115V motor, the 121D provides the electrical thrust necessary for large-scale residential or light commercial water systems. The motor is thermally protected and physically isolated from the fluid chamber, preventing radiant heat transfer from degrading the electrical insulation. Consistent rotational synchronization reduces shaft run-out, which preserves the integrity of the carbon-ceramic seal faces and ensures a leak-free interface during the high-cycle demands of modern plumbing systems.

Key Features of Taco 121D

• Corrosion-resistant stainless steel for potable water
• Reliable 1/4 HP motor for steady 115V performance
• Proven three-piece modular mechanical design
• Self-aligning sleeve bearings for long-term durability
• Spring coupling dampens mechanical harmonics
• Max working pressure: 125 PSI
• Maximum fluid temperature: 240°F