Grundfos - 519651 - 3/4" 15/16 Bronze Flange Set

Grundfos 519651 — 3/4″ Bronze Flange Set

The Grundfos 519651 is a robust bronze flange kit compatible with UP and UPS circulator pumps. This set includes everything needed — flanges, gaskets, and hardware — to provide reliable, serviceable connections for hydronic heating or hot water loops. 

Key Features & Benefits

• Durable bronze construction, ideal for hydronic systems
• Designed for 3/4″ NPT connections to match UP/UPS inlet/outlet ports 
• Full installation kit: includes flanges, gaskets, bolts/nuts
• Reliable mounting solution for retrofit or new installs
• Corrosion-resistant for long-term operation in heating systems

Applications

• Hydronic heating and domestic hot water systems
• Replacement flange kit for UP / UPS circulator pumps
• Systems requiring a fixed flange rather than unions
• Semi-permanent installations requiring durable fittings

Specifications

Strong, corrosion-resistant, and ready to install — the Grundfos 519651 bronze flange set provides a stable, long-lasting connection for your circulator pump systems.

Includes: (2) flanges (2) gaskets (4) bolts with nuts.