Honeywell NK300S-100UP BoilerFeed with Union Pressure Connect
The Honeywell NK300S-100UP is a professional-grade boiler feed unit designed to automatically maintain proper water levels in steam boiler systems. Featuring a union pressure connect design, this unit simplifies installation and servicing, allowing technicians to make secure, leak-free connections with ease. Built to Honeywell’s exacting standards, the NK300S-100UP is a dependable solution for residential and light commercial hydronic and steam heating applications.
Key Features
- Boiler feed unit engineered for automatic water level maintenance in steam boiler systems
- Union pressure connect fitting for fast, reliable, and serviceable installation
- Compact, durable construction suitable for residential and light commercial applications
- Designed for compatibility with standard steam boiler configurations
- Honeywell quality engineering for long-term, dependable performance
- Helps protect boilers from low-water conditions that can cause damage or unsafe operation
Application
The NK300S-100UP is ideal for use in steam heating systems where consistent boiler water feed and pressure management are critical. The union pressure connect design makes it a preferred choice for HVAC professionals who require a straightforward, maintainable installation in boiler rooms and mechanical spaces.
Why Choose the Honeywell NK300S-100UP?
- Trusted Honeywell brand reliability for hydronic and steam heating systems
- Union-style connection simplifies future maintenance and replacement
- Supports safe, efficient boiler operation by automating water feed control
- Engineered for professional HVAC and plumbing installations








