Grundfos 00519652 Flange Set

The Grundfos 00519652 Flange Set is a professional-grade 1" FNPT hardware kit engineered specifically for the Grundfos UP Series and UPS Series circulator pumps. As a veteran technician knows, using the correct bronze pump flanges is critical in open-loop or potable water systems to prevent the accelerated corrosion and "red water" issues common with standard cast iron components. This GF 15/26 flange kit ensures a leak-free, high-integrity connection between the pump housing and the hydronic piping, maintaining the hydraulic performance of residential and light commercial recirculating systems.

Forged from high-density, corrosion-resistant bronze, this 1" NPT threaded flange pair is designed to withstand the rigorous thermal cycling of hydronic heating and domestic hot water applications. The precision-machined 2-bolt pattern provides a reliable seal when torqued properly against the included gaskets. For contractors performing retrofits or new installs, this Grundfos 00519652 set provides the necessary mechanical interface to secure Grundfos Alpha, UP15, and UP26 models without risking the system contamination associated with ferrous metals.

Key Benefits:

• Potable Water Compatibility: High-grade bronze construction prevents oxidation and scaling in open-loop domestic hot water systems.
• Optimized Sealing: Includes high-quality gaskets and a robust 2-bolt design to ensure a leak-free pump connection.
• Standardized Threading: Features a 1" FNPT (Female National Pipe Thread) connection for seamless integration with standard North American plumbing.
• Universal UP Series Fit: Specifically engineered for Grundfos GF 15/26 flange patterns found on UP, UPS, and Alpha series pumps.
• Complete Installation Kit: Ships as a pair with all necessary bolts, nuts, and gaskets, reducing time on the job site.

Common Questions:

Will these flanges work with other pump brands?
While the 2-bolt pattern is a common industry standard for small circulators, these are specifically optimized for the Grundfos GF 15/26 mounting surface. Always verify the flange-to-flange dimension before installation.

Why use bronze instead of cast iron for this application?
In open-loop or fresh water systems where oxygen is present, cast iron will eventually corrode and seize. These bronze flanges are the professional choice for ensuring longevity and water quality in those environments.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.