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Galvanised steel reducing coupling, 3 inch to 1-1/2 inch FNPT threads

Legend Valve

Legend Valve 352-558 3" x 1-1/2" galvanised reducing coupling

SKU CH-6QN9-20SFQ

Galvanised reducing coupling joins 3-inch and 1-1/2-inch female NPT threads

  • Transitions from 3" to 1-1/2" pipe
  • Galvanised steel resists corrosion in plumbing
  • Female NPT threads on both ends
  • Legend Valve model 352-558 ensures fit
  • California Prop 65 chemical warning applies

Product identity

The Legend Valve 352-558 is a galvanised reducing coupling designed to join a 3 inch female NPT pipe to a 1-1/2 inch female NPT pipe. It suits plumbers and maintenance teams who need a durable, corrosion-resistant transition between different pipe diameters in water or gas systems.

Capacity and headroom

The fitting handles the pressure ratings standard for its class of galvanised malleable iron couplings, providing reliable service in typical residential and light commercial piping. It is not intended for high-pressure industrial mains or applications that exceed the standard pressure limits of the material and thread type.

Interface limits

The coupling uses FNPT x FNPT threads, so it connects only to male NPT fittings or pipes; it cannot mate with BSP, compression or push-fit connections without an adapter. The galvanised coating resists rust in normal wet environments but is not rated for continuous immersion in highly corrosive or saltwater conditions.

Highlights

  • Transitions from 3" to 1-1/2" pipe
  • Galvanised steel resists corrosion in plumbing
  • Female NPT threads on both ends
  • Legend Valve model 352-558 ensures fit
  • California Prop 65 chemical warning applies

Specifications

BrandLEGEND VALVE

Questions about this item

Will the 352-558 galvanised reducing coupling thread onto my existing 3" and 1-1/2" FNPT pipes?

Yes, the 352-558 is a 3" x 1-1/2" SA galvanised reducing coupling with FNPT x FNPT threads, so it connects directly to matching female NPT pipe ends.

How can I confirm the 352-558 is sealed properly after installation?

Pressurise the system and check the joint for leaks; a correctly threaded and sealed 352-558 coupling will hold pressure without weeping at either FNPT connection.

Does the 352-558 box include thread sealant or tape, or must I buy them separately?

The 352-558 is supplied as the coupling only; thread sealant or PTFE tape for the FNPT joints must be purchased separately.

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