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Two cast iron flanges with two bolt holes each

BELL AND GOSSETT

BELL AND GOSSETT 101206 Cast Iron Flange 1-1/4 in Pk2

SKU CH-02W5-6NRG8

Cast iron drain flange with two mounting holes fits 1-1/4 inch pipe and 0.5 inch bolt holes

  • TypeDrain Components
  • Cast iron construction resists corrosion and wear
  • 1-1/4 inch FNPT connection fits compatible HV series pumps
  • Two-bolt mounting pattern simplifies installation
  • Pack of two provides spare or dual-system coverage
  • Compatible with Bell & Gossett models 103404, 1BL002, 1BL016

Cast Iron Flange for HV Series Pumps

This Bell & Gossett cast iron flange fits 1-1/4 inch FNPT piping and is designed for use with HV series in-line circulating pumps. The standard pattern flange includes two mounting holes with a 0.5 inch bolt hole size and comes in a pack of two for convenient installation. It matches manufacturer model numbers 101006 and 101206 for direct replacement compatibility.

Thermals Noise and Power Draw

As a passive cast iron plumbing component, this flange generates no heat, produces no noise and draws no electrical power during normal operation. Its sole function is to provide a secure mechanical connection between the pump volute and the piping system. The material is not rated for potable water systems.

Sustained Load Behavior

Under continuous system pressure the cast iron construction maintains structural integrity without deformation or fatigue. The flange gasket surface relies on a separate gasket material, which is not included, to maintain a leak-free seal over time. Compatibility is confirmed with Grainger part numbers 3NVG5, 4JA85 and 4JA86 as well as pump models 103404, 1BL002 and 1BL016.

Highlights

  • Cast iron construction resists corrosion and wear
  • 1-1/4 inch FNPT connection fits compatible HV series pumps
  • Two-bolt mounting pattern simplifies installation
  • Pack of two provides spare or dual-system coverage
  • Compatible with Bell & Gossett models 103404, 1BL002, 1BL016

Specifications

TypeDrain Components
BrandBell & Gossett
Model101006

Questions about this item

How do I install the 1-1/4 in FNPT flange onto the pump, and what step is often missed?

Thread the flange onto the pump's 1-1/4 in FNPT connection, then secure it using the two mounting holes with 0.5 in bolts; the step often missed is verifying the bolt holes align with the pump's flange pattern before final tightening.

What maintenance or replacement will the cast iron flange need over time?

The cast iron flange itself requires no routine maintenance; however, the gasket between this flange and the pump should be inspected during pump service and replaced if it shows wear or leakage.

What is the first limitation that appears when this flange is used continuously in a hydronic system?

The flange is rated for standard HV series in-line circulating pumps; the primary limit under sustained use is the pressure and temperature rating of the connected pump and piping, not the flange casting itself.

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