Us Seal 91909874 Seal Kit 1.75 in Buna Ceramic Paco Pump

Product Description

The US SEAL 91909874 is a mechanical seal kit designed as a direct OEM-style replacement for Paco pump applications. This kit provides the sealing components needed to restore pump shaft integrity and prevent fluid leakage in centrifugal pump systems. With a 1.75-inch seal size and a Buna-N elastomer paired with a ceramic seal face, it delivers reliable chemical compatibility and wear resistance in typical hydronic and water-handling service. Licensed plumbers and pump service technicians are the primary installers of this component.

This seal kit is suited for pump repair and maintenance work in residential and light commercial plumbing, hydronic heating, and water circulation systems where Paco brand pumps are installed. It is used during scheduled maintenance intervals or when shaft seal failure causes visible leakage at the pump housing. Having the correct seal size and material combination is critical to achieving a leak-free repair and avoiding repeat service calls.

Key Features

• 1.75-inch seal diameter for precise fitment in compatible Paco pump housings
• Buna-N elastomer construction provides resistance to water and common hydronic system fluids
• Ceramic seal face offers hardness and wear resistance for extended service life
• OEM-style replacement designed to restore original pump sealing performance
• Supports leak-free pump operation in water circulation and hydronic applications

Compatibility

Designed as an OEM-style replacement seal kit for Paco pump models requiring a 1.75-inch Buna-N and ceramic mechanical seal. Verify shaft diameter and seal chamber dimensions against existing pump specifications before installation.

Installation Notes

Installation should be performed by a licensed plumber or qualified pump service technician. Shut off all fluid supply and depressurize the system before disassembling the pump. Clean the seal cavity and shaft thoroughly before seating the new seal components to prevent contamination-related premature failure. Refer to the pump manufacturer service documentation for proper seal installation sequence and torque guidance.

Technical Specifications

• Seal Size: 1.75 inches
• Elastomer Material: Buna-N
• Seal Face Material: Ceramic
• Compatible Pump Brand: Paco Pump

Standard Information

• Brand: US SEAL
• Manufacturer Part Number: 91909874