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Galvanized steel reducing coupling, 3 inch by 1-1/4 inch FNPT threads

Legend Valve

Legend Valve 352-557 3" x 1-1/4" galvanized reducing coupling hvac control

SKU CH-A89F-JHC8Q

Galvanized reducing coupling joins 3-inch and 1-1/4-inch FNPT pipe ends for HVAC systems

  • Galvanized steel resists corrosion in HVAC systems
  • Reducing coupling joins 3" to 1-1/4" FNPT threads
  • Legend Valve model 352-557 ensures reliable fit
  • New condition guarantees full service life
  • Proposition 65 notice included for safety compliance

3" x 1-1/4" Galvanized Reducing Coupling

The Legend Valve 352-557 is a galvanized reducing coupling designed for HVAC control systems. It connects a three-inch female NPT thread to a one-and-a-quarter-inch female NPT thread. This new component suits installers joining dissimilar pipe diameters in hydronic or steam applications.

FNPT x FNPT Threaded Connection

Both ends feature female National Pipe Taper threads for direct engagement with male-threaded pipe nipples or fittings. The galvanized steel construction resists corrosion in typical heating and cooling fluid circuits. No soldering, welding or specialized tools are required for assembly.

Reduces from Three Inches to One-and-a-Quarter

The fitting handles the flow transition between the two stated pipe sizes within standard HVAC pressure and temperature ranges. It does not suit applications requiring a larger or smaller reduction ratio. Installers needing different diameter combinations must select an alternative coupling.

Highlights

  • Galvanized steel resists corrosion in HVAC systems
  • Reducing coupling joins 3" to 1-1/4" FNPT threads
  • Legend Valve model 352-557 ensures reliable fit
  • New condition guarantees full service life
  • Proposition 65 notice included for safety compliance

Specifications

BrandLEGEND VALVE

Questions about this item

How does the galvanized finish hold up when the 352-557 reducing coupling is under constant pressure in a hydronic system?

The galvanized coating resists corrosion from water and glycol mixes, so the coupling maintains its seal during continuous operation without the finish degrading first.

Does the 557 coupling generate noticeable vibration or heat when fluid runs through it all day?

As a passive fitting with no moving parts, it produces no vibration or heat of its own; any temperature rise comes only from the fluid inside.

Which pipe threads do I need on hand before installing the 352 reducing coupling?

You need a 3-inch FNPT pipe end and a 1-1/4-inch FNPT pipe end, both clean and properly threaded, to make the two connections.

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