🔧 Grundfos 529911 3/4" Bronze Union Sweat Fitting Set
📝 Product Overview
The Grundfos 529911 Union Fitting Set is a 3/4" bronze sweat connection kit designed for easy installation and service of compatible circulator pumps. This union set allows for quick pump removal and replacement without cutting or reworking piping.
Built for durability and reliability, it’s specifically used with Grundfos UP15-18SU and UP25-64SU circulator pumps.
✅ Key Features & Benefits
✔️ 3/4" Sweat Connections – Standard size for easy integration into piping systems
✔️ Complete Union Set – Includes nuts, gaskets, and adapters for installation
✔️ Bronze Construction – Ideal for hydronic heating and potable water systems
✔️ Easy Pump Serviceability – Simplifies maintenance and pump replacement
✔️ OEM Fit – Designed for Grundfos circulator pumps
⚡ Specifications
| Parameter | Specification |
|---|
| Model Number |
529911 |
| Connection Type |
Sweat (solder) |
| Size |
3/4" |
| Material |
Bronze |
| Includes |
(2) Union Nuts, Gaskets, Adapters |
| Application |
Circulator pump installation |
📌 Compatibility
Designed for use with:
-
Grundfos UP15-18SU
-
Grundfos UP25-64SU
⚡ Common Symptoms This Part Helps Solve
-
Difficulty removing or replacing circulator pump
-
Leaks at pump connection points
-
Missing or worn union fittings
-
Improper pump installation
❓ Frequently Asked Questions (FAQ)
Q: What comes in this union set?
A: Two union nuts, gaskets, and adapters for complete installation.
Q: What size piping does this fit?
A: 3/4" sweat (solder) connections.
Q: Which pumps is this compatible with?
A: Grundfos UP15-18SU and UP25-64SU circulator pumps.
Q: Is this required for installation?
A: While not always required, union fittings are highly recommended for easier maintenance and pump replacement.
🛒 Shopping Tips
-
Confirm your pump model before purchasing (UP15-18SU or UP25-64SU)
-
Ensure your system uses 3/4" sweat connections
-
Always replace gaskets when reinstalling to prevent leaks
