
Grundfos 00529913 Union Adapter Set
The Grundfos 00529913 Union Adapter Set is a professional-grade 1/2" sweat connection kit engineered for high-performance fluid handling. Constructed from heavy-duty bronze, this pump union set provides superior corrosion resistance, making it an ideal choice for residential hot water recirculation systems and open-loop heating applications. This genuine Grundfos replacement part is specifically designed for UP and UPS series circulator pumps, ensuring a precision fit with GU 125 union connections. Each bronze union adapter set includes two 1/2" sweat adapters and two high-temperature gaskets, allowing technicians to create a reliable, leak-free seal without the need for extensive modifications. The unionized design facilitates rapid installation and simplifies future maintenance by allowing the circulator to be serviced or replaced without cutting into the existing copper piping. These adapters are compliant with NSF/ANSI 372 standards for low-lead requirements, ensuring compatibility with modern potable water safety regulations.
Key Benefits
- Corrosion-Resistant Bronze: Engineered for durability in oxygen-rich potable water and open-loop hydronic systems.
- Universal Compatibility: Optimized for Grundfos UP15-18SU, UP15-42SU, and UP25-64SU circulator pumps.
- Service-Friendly Design: The 1/2 inch union set allows for quick isolation and removal of the pump during system maintenance.
- Leak-Free Reliability: Precision-machined threads and included high-grade gaskets ensure a secure, pressure-tight connection.
- Certified Safety: Meets NSF 372 lead-free standards, making it safe for domestic hot water applications.
Common Questions
Does this set include both adapters needed for a single pump?
Yes, the 00529913 is sold as a pair, providing both the suction and discharge side adapters along with the necessary gaskets for a complete installation.
What type of connection does this adapter use?
This is a 1/2 inch sweat (solder) connection designed to interface directly with standard copper piping and 1-1/4" GU 125 pump housings.
Can I use these bronze unions for a cast iron pump?
While they physically fit the GU 125 connection, bronze unions are typically paired with bronze or stainless steel pumps. For cast iron pumps in closed-loop systems, cast iron flanges or unions are often preferred to match the metallurgy.
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.
Original: $54.99
-65%$54.99
$19.25Grundfos 00529913 Union Adapter Set
The Grundfos 00529913 Union Adapter Set is a professional-grade 1/2" sweat connection kit engineered for high-performance fluid handling. Constructed from heavy-duty bronze, this pump union set provides superior corrosion resistance, making it an ideal choice for residential hot water recirculation systems and open-loop heating applications. This genuine Grundfos replacement part is specifically designed for UP and UPS series circulator pumps, ensuring a precision fit with GU 125 union connections. Each bronze union adapter set includes two 1/2" sweat adapters and two high-temperature gaskets, allowing technicians to create a reliable, leak-free seal without the need for extensive modifications. The unionized design facilitates rapid installation and simplifies future maintenance by allowing the circulator to be serviced or replaced without cutting into the existing copper piping. These adapters are compliant with NSF/ANSI 372 standards for low-lead requirements, ensuring compatibility with modern potable water safety regulations.
Key Benefits
- Corrosion-Resistant Bronze: Engineered for durability in oxygen-rich potable water and open-loop hydronic systems.
- Universal Compatibility: Optimized for Grundfos UP15-18SU, UP15-42SU, and UP25-64SU circulator pumps.
- Service-Friendly Design: The 1/2 inch union set allows for quick isolation and removal of the pump during system maintenance.
- Leak-Free Reliability: Precision-machined threads and included high-grade gaskets ensure a secure, pressure-tight connection.
- Certified Safety: Meets NSF 372 lead-free standards, making it safe for domestic hot water applications.
Common Questions
Does this set include both adapters needed for a single pump?
Yes, the 00529913 is sold as a pair, providing both the suction and discharge side adapters along with the necessary gaskets for a complete installation.
What type of connection does this adapter use?
This is a 1/2 inch sweat (solder) connection designed to interface directly with standard copper piping and 1-1/4" GU 125 pump housings.
Can I use these bronze unions for a cast iron pump?
While they physically fit the GU 125 connection, bronze unions are typically paired with bronze or stainless steel pumps. For cast iron pumps in closed-loop systems, cast iron flanges or unions are often preferred to match the metallurgy.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Grundfos 00529913 Union Adapter Set is a professional-grade 1/2" sweat connection kit engineered for high-performance fluid handling. Constructed from heavy-duty bronze, this pump union set provides superior corrosion resistance, making it an ideal choice for residential hot water recirculation systems and open-loop heating applications. This genuine Grundfos replacement part is specifically designed for UP and UPS series circulator pumps, ensuring a precision fit with GU 125 union connections. Each bronze union adapter set includes two 1/2" sweat adapters and two high-temperature gaskets, allowing technicians to create a reliable, leak-free seal without the need for extensive modifications. The unionized design facilitates rapid installation and simplifies future maintenance by allowing the circulator to be serviced or replaced without cutting into the existing copper piping. These adapters are compliant with NSF/ANSI 372 standards for low-lead requirements, ensuring compatibility with modern potable water safety regulations.
Key Benefits
- Corrosion-Resistant Bronze: Engineered for durability in oxygen-rich potable water and open-loop hydronic systems.
- Universal Compatibility: Optimized for Grundfos UP15-18SU, UP15-42SU, and UP25-64SU circulator pumps.
- Service-Friendly Design: The 1/2 inch union set allows for quick isolation and removal of the pump during system maintenance.
- Leak-Free Reliability: Precision-machined threads and included high-grade gaskets ensure a secure, pressure-tight connection.
- Certified Safety: Meets NSF 372 lead-free standards, making it safe for domestic hot water applications.
Common Questions
Does this set include both adapters needed for a single pump?
Yes, the 00529913 is sold as a pair, providing both the suction and discharge side adapters along with the necessary gaskets for a complete installation.
What type of connection does this adapter use?
This is a 1/2 inch sweat (solder) connection designed to interface directly with standard copper piping and 1-1/4" GU 125 pump housings.
Can I use these bronze unions for a cast iron pump?
While they physically fit the GU 125 connection, bronze unions are typically paired with bronze or stainless steel pumps. For cast iron pumps in closed-loop systems, cast iron flanges or unions are often preferred to match the metallurgy.
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.












