A.Y. McDonald 74754-22-1X3/4 1...
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A.Y. McDonald 74754-22-1X3/4 1" x 3/4" Reducing Coupling

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Model: 74754-22-1X3/4

In Stock (leaves warehouse same day if ordered before 3pm ET)

$41.28
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A.Y. McDonald 74754-22 1" x 3/4" Reducing Coupling

The A.Y. McDonald 74754-22 is a 1" x 3/4" reducing coupling built for rough-in plumbing installations where a transition between two different pipe sizes is required. This fitting, cross-referenced as A.Y. McDonald part number 5121-002, is sized to join a 1" run down to a 3/4" branch line, making it a straightforward choice for contractors and plumbers who need a reliable size-change connection behind the wall or below the floor. As a coupling, its sole job is to create a secure, in-line transition point between two lengths of pipe of differing diameters, and it is intended to be installed by a licensed plumber or qualified rough-in contractor as part of a larger supply or distribution run.

Key Features

  • Trade Size: 1" x 3/4" reducing configuration for transitioning between two pipe diameters in a single run.
  • Coupling Design: In-line fitting engineered to join and reduce pipe sizes at a single connection point, simplifying rough-in layouts where branch lines drop to a smaller diameter.
  • Cross-Reference Number: Also identified as A.Y. McDonald 5121-002, useful for matching replacement parts against existing rough-in documentation or prior installations.
  • Rough-In Application: Designed for use behind walls, under floors, or in other concealed plumbing runs where a compact, dependable size transition is needed.
  • Single-Point Transition: Reduces the number of fittings needed in a run by combining a coupling and a reducer function into one part.

Technical Specifications

  • Trade Size: 1" x 3/4"
  • Part Number: 74754-22
  • Cross-Reference: 5121-002
  • Product Type: Reducing Coupling

Typical Applications

  • Residential and Commercial Rough-In Plumbing
  • Pipe Size Transitions Behind Walls or Under Floors
  • Branch Line Reductions from Main Supply Runs
  • Renovation and New Construction Plumbing Projects
  • Replacement of Existing 74754-22 / 5121-002 Fittings

Why A.Y. McDonald?

A.Y. McDonald is a long-established name in waterworks and plumbing rough-in products, supplying fittings that plumbers and contractors rely on for dependable, code-focused installations. The 74754-22 coupling continues that focus by giving installers a purpose-built 1" x 3/4" transition fitting for rough-in runs, cross-referenced to part 5121-002 for easy matching against existing job specifications. Stock the A.Y. McDonald 74754-22 for your next rough-in job at ZenSupply.

Manufacturer Resources

Product Specs

list_batch:
AYM-20260924
Product Type:
Coupling
Configuration:
Reducing
Department:
Plumbing
Product Group:
Plumbing
Product Subgroup:
Pipe Fittings
Product Size:
1" x 3/4"

A.Y. McDonald 74754-22-1X3/4 – Frequently Asked Questions

1) What size pipe does the A.Y. McDonald 74754-22 reducing coupling join?
The 74754-22 is a 1 inch by 3/4 inch reducing coupling. It makes an in-line transition from a 1 inch run down to a 3/4 inch branch or continuation, so one fitting does the work of a coupling plus a reducer at a single joint.
2) Is A.Y. McDonald 5121-002 the same part as the 74754-22 coupling?
Same fitting. The 1 inch by 3/4 inch reducing coupling sold as 74754-22 is cross-referenced by A.Y. McDonald as 5121-002, so if your job spec or prior rough-in paperwork calls out 5121-002, this is the part that matches it.
3) I need to drop a 3/4 inch branch off a 1 inch main. Is a reducing coupling the right fitting, or do I need a tee?
A reducing coupling only works where the line itself changes size in a straight run. The 74754-22 joins a 1 inch length to a 3/4 inch length at one in-line point. If the 1 inch main has to continue past the takeoff, you need a reducing tee instead, not a coupling. Use this fitting where the run steps down and carries on at 3/4 inch.
4) Can I use this A.Y. McDonald coupling in a concealed wall or under-floor run?
That is what it is built for. The 74754-22 is a rough-in fitting intended for concealed supply and distribution runs behind walls, under floors, and in similar locations where a compact size change is needed. It is meant to be installed by a licensed plumber or qualified rough-in contractor as part of a larger run.
5) I am replacing an existing 74754-22 fitting in an older rough-in. Will this match?
Yes, it is a direct like-for-like for an existing 74754-22 or 5121-002 fitting in a 1 inch to 3/4 inch transition. Replacement of those existing fittings is one of the stated applications for this coupling.
How fast can I get the A.Y. McDonald 74754-22-1X3/4 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the A.Y. McDonald 74754-22-1X3/4 come with a warranty?
Absolutely. The A.Y. McDonald 74754-22-1X3/4 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the A.Y. McDonald 74754-22-1X3/4?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the A.Y. McDonald 74754-22-1X3/4 from ZenSupply?
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