Grundfos 519601 — 3/4″ Cast Iron GF15/26 Flange Set for UP/UPS Circulators

Grundfos 519601 — 3/4″ GF15/26 Cast Iron Flange Set

The Grundfos 519601 is a durable cast-iron flange set designed for use with the GF15/26 connection standard on UP and UPS circulator pumps. It provides a secure and serviceable connection point in hydronic systems. 

Key Features & Benefits

• Compatible with VersaFlo UP / UPS circulator pump series 
• Connects to 3/4″ NPT pipe for standard plumbing compatibility 
• Set includes: 2 flanges, 2 gaskets, 2 bolts & nuts for complete installation 
• Threaded fitting design for secure, leak-resistant mounting 
• Strong cast-iron construction for long-term reliability 

Applications

• Hydronic heating systems using UP / UPS circulator pumps
• Replacement or upgrade of older flange or union connections
• Systems where a removable flange connection is desired for maintenance

Specifications

A reliable, cast-iron flange set that gives your pump connection strength, serviceability, and compatibility with standard 3/4″ NPT plumbing.

Use with Versa Flo UP and UPS pumps
Pump connection GF 15/26
3/4-inch NPT pipe connection
Fitting is threaded for security
Includes 2 flanges, 2 gaskets, 2 bolts with nuts