Navien Primary Manifold Kit for NFB Series GFFM-MSOZUS-002

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Wholesale price$815.76 Sale price$679.80

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Navien’s NFB primary manifold kits are system matched for fast installations and maximum efficiency.


  • Approved and designed specifically for installations with NFB-175/200 Series Boilers only
  • Compact design that is ideal for hydronic and radiant space heating applications
  • Package comes pre-assembled in order to reduce labor time and cost for installations while maximizing system efficiency without the need to fabricate a custom manifold
  • The SUPPLY and RETURN connections on the manifold attach directly onto the fittings located at the bottom of the boiler unit
  • 1-1/4“ FNPT dielectric unions for boiler SUPPLY and RETURN
  • Two 1-1/4” stub-outs for direct connection with an indirect DHW tank
  • Shut-off valves provided for system isolation and ease of service
  • Two 1/4” service and drain ports for easy maintenance
  • Single 3/4” port for use with heating system accessories


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