GRUNDFOS - Flange Kit (ALPHA2) (models: UPS15-58FC UPS26-99FC UPS26-150F)

The Grundfos ALPHA2 Flange Kit is a complete installation kit designed for Grundfos ALPHA2 and UPS series circulator pumps, including the UPS15-58FC, UPS26-99FC, and UPS26-150F. Manufactured from durable cast iron, the kit includes two threaded flanges, flange gaskets, mounting bolts, and nuts to provide a secure, leak-free connection between the pump and piping system. Available in multiple pipe sizes, the flange kit simplifies new installations and pump replacements while ensuring proper alignment and dependable long-term performance in hydronic heating and hot water recirculation systems. It is an essential accessory for professional pump installations.

Cross References

1. Grundfos — 519601 (3/4 in Cast Iron Flange Kit)
2. Grundfos — 519602 (1 in Cast Iron Flange Kit)
3. Grundfos — 519603 / 519604 (larger threaded flange kits, depending on size)

Usage

The Grundfos ALPHA2 Flange Kit is used to connect compatible Grundfos circulator pumps to threaded hydronic piping systems. The kit includes two cast iron flanges, two flange gaskets, four bolts, and four nuts, allowing quick installation or replacement of a circulator pump without requiring separate hardware. These flange kits are commonly installed on residential and commercial hydronic heating systems, boiler systems, radiant floor heating systems, and domestic hot water recirculation systems. Selecting the proper flange size ensures correct pipe connection and reliable sealing.