For optimal proportional control

the "H" suffix often denotes high-performance packaging or internal manufacturer coding

This ensures maximum concentricity and torque carrying capacity compared to standard bored-to-size alternatives

OEM Compatibility: Replaces legacy part numbers and integrates seamlessly with York

Certified Safety: Fully ASME Section IV and ANSI Z21

Grundfos 00519852 Isolation Valve Set 322027-701 For optimal proportional controlThe Grundfos 00519852 Isolation Valve Set is a critical component for streamlining the installation and maintenance of Grundfos UP series circulator pumps. Engineered with a 3 4 inch Bronze Union connection, this valve set provides a reliable, leak free interface for residential and light commercial hydronic systems. The bronze construction ensures superior corrosion resistance, making it an essential choice for open loop potable water systems or