A.Y. McDonald 5998-002 1/2" Pi...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$42.38
A.Y. McDonald 5998-002 1/2" Pipe Coupling Fitting

A.Y. McDonald 5998-002 1/2" Pipe Coupling Fitting

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Model: 5998-002

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

$42.38
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A.Y. McDonald 5998-002 1/2" Pipe Coupling Fitting

The A.Y. McDonald 5998-002 is a 1/2" pipe coupling designed for rough-in plumbing installations where two lengths of pipe need to be joined in a straight run. Identified in the manufacturer's catalog under reference 74758QC, this coupling is sized for 1/2" pipe and is built for use behind the wall or under the floor in residential and commercial supply lines. As a straight coupling, it provides a simple, reliable way to extend or repair a pipe run without changing direction, making it a staple part for plumbers stocking rough-in fittings on the truck or in the shop.

Key Features

  • Trade Size: 1/2" nominal pipe size, matching standard 1/2" supply and distribution lines commonly found in residential and light commercial rough-in work.
  • Straight Coupling Configuration: Joins two sections of 1/2" pipe in a straight line, allowing plumbers to extend runs or splice in repairs without introducing an angle or offset.
  • A.Y. McDonald Manufacturing: Produced by A.Y. McDonald, a long-established name in waterworks and plumbing rough-in components trusted by contractors and supply houses.
  • Rough-In Application: Intended for behind-the-wall and under-floor installation as part of a larger supply or distribution system, not as a finished, visible fixture.
  • Catalog Reference 74758QC: Cross-referenced under part number 74758QC for identification when matching against distributor and wholesaler catalogs.

Technical Specifications

  • Trade Size: 1/2"
  • Type: Coupling
  • Manufacturer Reference: 74758QC
  • Brand: A.Y. McDonald

Typical Applications

  • Residential Rough-In Water Supply Lines
  • Commercial Plumbing Rough-In Installations
  • Extending or Splicing Existing 1/2" Pipe Runs
  • Renovation and Repair of Behind-the-Wall Plumbing
  • New Construction Distribution Piping

Why A.Y. McDonald?

A.Y. McDonald has long supplied rough-in plumbing components that contractors rely on to keep supply lines moving from the truck to the trench to the wall cavity. The 5998-002 coupling is a straightforward, purpose-built fitting sized to match standard 1/2" pipe, giving plumbers a dependable way to join or extend runs without guesswork. For pros who need consistent, correctly sized rough-in fittings on hand for daily service and installation work, stocking A.Y. McDonald parts like the 5998-002 helps keep jobs moving without waiting on a special order.

Manufacturer Resources

Product Specs

list_batch:
AYM-20260924
Product Type:
Coupling
Department:
Plumbing
Product Group:
Plumbing
Product Subgroup:
Pipe Fittings
Product Size:
1/2"

A.Y. McDonald 5998-002 – Frequently Asked Questions

1) What size pipe does the A.Y. McDonald 5998-002 coupling join?
The 5998-002 is a 1/2 inch nominal coupling, so it joins two runs of 1/2 inch supply or distribution pipe. It is a straight coupling, meaning it extends a run or splices a repair in line with no change of direction or offset.
2) Is the A.Y. McDonald 5998-002 meant for behind-the-wall rough-in or for exposed finished work?
Rough-in only. The 5998-002 coupling is built for behind-the-wall and under-floor installation as part of a larger supply or distribution system, not as a finished visible fitting. If you need a chrome or decorative exposed connection at a fixture, this is the wrong part.
3) Can the 5998-002 coupling be used to splice a repair into an existing 1/2 inch line, or only on new construction?
Both. A.Y. McDonald lists the 5998-002 for residential and commercial rough-in supply lines, extending or splicing existing 1/2 inch pipe runs, renovation and repair work behind the wall, and new construction distribution piping.
4) What part number do I order the A.Y. McDonald 1/2 inch coupling under, and is there a cross-reference number?
Order it as A.Y. McDonald 5998-002. The manufacturer also identifies the same coupling under catalog reference 74758QC, which is the number you may see in distributor and wholesaler listings when matching the item.
5) I need a 1/2 inch elbow or a reducing fitting - will the 5998-002 work?
No. The 5998-002 is a straight coupling sized for 1/2 inch pipe on both ends, so it only joins like-size pipe in a straight line. A change of direction needs an elbow, and a change of size needs a reducing fitting or bushing.
How fast can I get the A.Y. McDonald 5998-002 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 5998-002 come with a warranty?
Absolutely. The A.Y. McDonald 5998-002 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 5998-002?
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 5998-002 from ZenSupply?
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