Description
The Xylem-McDonnell & Miller 25A-HD is a dependable make-up water feeder engineered for use with boiler receiver tanks in hydronic heating systems. Sold as the head mechanism only (Part Number 127100), this unit provides a convenient replacement or upgrade solution without the need to replace the entire assembly.
Product Overview
Make-up water feeders are a critical component in closed-loop boiler systems, automatically replenishing system water lost through minor leaks or evaporation to maintain proper operating pressure. The 25A-HD is designed for reliable, low-maintenance performance in commercial and residential boiler applications.
Key Features
- Designed for use with boiler receiver tanks
- 35 PSI maximum vessel pressure rating
- Head mechanism only — ideal for replacement without full assembly swap
- Manufactured by Xylem-McDonnell & Miller, a trusted name in hydronic system controls
- Part Number: 127100
- SKU: 25A-HD
Application
- Hydronic boiler systems requiring automatic make-up water control
- Boiler receiver tank installations
- Commercial and residential heating system maintenance and repair
Why Choose Xylem-McDonnell & Miller?
Xylem-McDonnell & Miller has been a leading manufacturer of boiler controls and hydronic system components for decades. Their make-up water feeders are recognized throughout the industry for precision engineering, durability, and ease of installation — making the 25A-HD a go-to choice for HVAC professionals and mechanical contractors.
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