PRIMARY MANIFOLD KIT NFC/NCB

🔧 What it is

This kit is a factory primary loop manifold assembly that mounts directly to Navien boilers in the:

• NCB series (combi boilers)
• NFC series (high-efficiency combi boilers)

It replaces or simplifies the boiler’s primary piping connections.

⚙️ What it does

The manifold:

• Connects the boiler to the heating system supply and return
• Creates a built-in primary loop (closely spaced tee design)
• Includes isolation valves for serviceability
• Integrates ports for:
  • PRV / pressure relief
  • air vent
  • LWCO (low water cutoff plug/adapter depending model)

🧰 Key features

• Material: stainless steel manifold body
• Pre-assembled for fast installation
• Built-in:
  • isolation valves
  • drain/service ports
  • dielectric unions/adapters
• Designed for:
  • NCB-H and NFC-H series boilers
• Reduces custom pipe fabrication on installs (turn0search0)

🏠 Where it’s used

• Hydronic heating systems
• Combi boiler installations (heat + domestic hot water)
• Radiant floor or baseboard heating setups
• New construction or retrofit Navien installs