Wal-rich a000337 Circulator Flange Gasket 1-1/2x1/2x1/8 in

Product Description

The WAL-RICH a000337 is a circulator flange gasket designed to provide a leak-resistant seal at circulator pump flange connections in hydronic heating and plumbing systems. Constructed from red SBR rubber, this gasket delivers flexibility and durability under the temperature and pressure cycling common in closed-loop heating systems. At a nominal size of 1-1/2 x 1/2 x 1/8 inches, it is sized for a precise fit at standard circulator flange connections. Plumbers and hydronic heating technicians install this gasket during circulator pump service or replacement to maintain system integrity and prevent weeping at flange joints.

This gasket is suited for residential and light commercial hydronic heating applications, including baseboard and radiant floor heating systems where circulator pumps are used to move heated water through the loop. The kit includes 2 A000337 gaskets, four 7/16-inch 14T bolts, and four 7/16-inch hex nuts, providing the hardware needed for a complete flange connection. It is appropriate for new installations and as a replacement during circulator pump service calls.

Key Features

• Red SBR rubber construction provides flexibility, wear resistance, and durability in hydronic service
• Nominal size 1-1/2 x 1/2 x 1/8 inches for standard circulator flange fitment
• Kit includes 2 gaskets, four 7/16-inch 14T bolts, and four 7/16-inch hex nuts
• Engineered to resist leaks under the temperature and pressure cycling of closed-loop heating systems
• Color: Red — aids visual identification and installation orientation

Compatibility

Designed as an OEM-style replacement gasket for standard circulator pump flange connections in residential and light commercial hydronic heating and plumbing systems.

Installation Notes

Installation is typically performed by a licensed plumber or hydronic heating technician. Before servicing, shut off the circulator pump, isolate the zone or drain the system as required, and allow the system to cool to a safe handling temperature. Ensure mating flange surfaces are clean and free of old gasket material before seating the new gasket. Follow applicable IPC and local mechanical code requirements for pressure testing after reassembly.