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Zoro Select 222142 gray cast iron reducing coupling 2 inch by 4 inch

Zoro Select

Zoro Select 222142 Reducing Coupling 2 in x 4 in Pipe

SKU CH-HKSZ-PFDSA

Cast-iron reducing coupling joins a 2 in socket to a 4 in socket in drainage systems

  • Connects 2 in and 4 in pipe diameters
  • Cast iron construction resists corrosion and wear
  • Bitumen coating adds extra protection against moisture
  • Class 20 rating suits standard drainage installations
  • Socket joints on both ends simplify assembly

Zoro Select 222142 Reducing Coupling

This Zoro Select 222142 reducing coupling connects a 2 in pipe to a 4 in pipe using female socket ends on both sides. The fitting is made from gray cast iron with a bitumen coating and meets Class 20 specifications. It is a straight, short increaser reducer designed for plumbing pipe connections.

Suited for cast iron pipe transitions

Installers joining dissimilar pipe diameters in drainage or low-pressure systems will find this coupling matches the required 2 in and 4 in socket dimensions. Builders working with high-pressure lines or schedules requiring a specific pressure rating should look elsewhere because the maximum operating pressure is listed as 0 psi.

Fits into gravity-flow plumbing assemblies

The coupling sits between a 2 in pipe and a 4 in pipe, requiring compatible socket joints and appropriate sealant or gasket material for the cast iron surfaces. Its short length keeps the overall run compact, freeing space in tight trenches or wall cavities where a longer increaser would not fit.

How it compares

Measured against everything we stock in Garden Hoses & Pipe Tubing, at today’s prices. Recalculated every night.

Price $20.99
Typical for this category: the median of 973 items is $21.99.

Specifications

Product
Brand nameZORO SELECT

Questions about this item

What pipe sizes must I already have to connect with this 2 in x 4 in reducing coupling?

You need a 2-inch pipe for the smaller socket and a 4-inch pipe for the larger socket; both ends are female socket fittings.

Will this cast iron coupling join properly to older gray iron pipe already in the system?

Yes, the gray cast iron Class 20 body matches traditional gray iron pipe dimensions for a compatible socket fit.

How can I verify the joint is sound after assembling the 2 13/32 in and 4 7/16 in sockets?

Pressurise the system and inspect both socket connections for leaks; the coupling is rated for 0 psi maximum operating pressure.

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