The Story
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
| Part Number / SKU | 519601 |
| Flange Type | GF15/26 cast iron |
| Pipe Connection | 3/4″ NPT |
| Includes | 2 flanges, 2 gaskets, 2 bolts with nuts |
| Compatible Pumps | Grundfos UP / UPS family models using GF15/26 mounting |
| Material | Cast Iron |
Common Questions
Q: Will this flange set work with my UP15-58 FC pump?
A: Yes — it’s compatible with many UP/UPS models that use the GF15/26 mounting standard.
Q: Are the gaskets reusable?
A: Gaskets are included. Reuse depends on condition — better to replace if worn or deformed.
Q: Does it include hardware?
A: Yes — bolts and nuts are included for full installation.
A reliable, cast-iron flange set that gives your pump connection strength, serviceability, and compatibility with standard 3/4″ NPT plumbing.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
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
| Part Number / SKU | 519601 |
| Flange Type | GF15/26 cast iron |
| Pipe Connection | 3/4″ NPT |
| Includes | 2 flanges, 2 gaskets, 2 bolts with nuts |
| Compatible Pumps | Grundfos UP / UPS family models using GF15/26 mounting |
| Material | Cast Iron |
Common Questions
Q: Will this flange set work with my UP15-58 FC pump?
A: Yes — it’s compatible with many UP/UPS models that use the GF15/26 mounting standard.
Q: Are the gaskets reusable?
A: Gaskets are included. Reuse depends on condition — better to replace if worn or deformed.
Q: Does it include hardware?
A: Yes — bolts and nuts are included for full installation.
A reliable, cast-iron flange set that gives your pump connection strength, serviceability, and compatibility with standard 3/4″ NPT plumbing.
