A.Y. McDonald 74779M-22-1IN 1"...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$60.70
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A.Y. McDonald 74779M-22-1IN 1" Quarter-Turn Valve, 5141 Series

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Model: 74779M-22-1IN

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

$60.70
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A.Y. McDonald 74779M-22-1IN 1" Quarter-Turn Valve, 5141 Series

The A.Y. McDonald 74779M-22-1IN is a 1" quarter-turn valve from the 5141-124 series, built for rough-in and behind-the-wall plumbing installations where a compact, reliable shut-off is required. Identified by A.Y. McDonald's own 5141-124 model designation, this is a quarter-turn style stop sized for 1" pipe or tubing connections, giving installers a full on/off cycle in a single quarter rotation of the handle rather than the multiple turns required by a traditional globe-style stop. As a rough-in component, it is intended to be installed by a licensed plumber or contractor at the point where a water line needs a dedicated, easily identifiable shut-off point behind a wall, under a floor, or at a fixture supply run.

Key Features

  • Trade Size: 1" connection sized for standard 1" supply piping or tubing runs.
  • Quarter-Turn Operation: A single quarter rotation of the handle moves the valve from fully open to fully closed, speeding up shut-off during service or emergency work compared to multi-turn stops.
  • Series Identification: Manufactured under A.Y. McDonald's 5141-124 model designation, part of the 74779M-22 product line, for consistent cross-reference when ordering replacement parts or matching an existing installation.
  • Rough-In Ready: Designed to be installed behind a wall or beneath a floor as part of a supply line, ahead of the finished fixture connection.
  • Compact Profile: Sized for tight rough-in spaces typical of residential and light commercial supply runs.

Technical Specifications

  • Brand: A.Y. McDonald
  • Model/Series: 5141-124 / 74779M-22
  • Trade Size: 1"
  • Operation Type: Quarter-Turn

Typical Applications

  • Residential and Commercial Rough-In Plumbing
  • Water Supply Line Shut-Off Points
  • New Construction Plumbing Installations
  • Plumbing Renovation and Repipe Projects
  • Fixture Supply Line Isolation

Why A.Y. McDonald?

A.Y. McDonald is a long-standing name in waterworks and plumbing supply, and the 5141-124 series quarter-turn valve reflects the straightforward, function-first design plumbers expect for rough-in shut-off points. Ordering by the exact 74779M-22-1IN model and 1" trade size ensures the correct fit when matching an existing installation or specifying a new one. Contractors can rely on A.Y. McDonald's part-numbering consistency to source the right valve for the job without guesswork.

Manufacturer Resources

Product Specs

list_batch:
AYM-20260924
Product Type:
Valve
Configuration:
Quarter-Turn
Series:
5141-124
Department:
Plumbing
Product Group:
Plumbing
Product Subgroup:
Plumbing
Product Size:
1"

A.Y. McDonald 74779M-22-1IN – Frequently Asked Questions

1) What part number do I order to match an existing A.Y. McDonald 1 inch quarter-turn rough-in stop?
Order by model 74779M-22-1IN, which is A.Y. McDonald's 5141-124 designation in the 1 inch trade size. That model number plus the 1 inch size is the whole identity of the part, so quoting both is what keeps a repipe or replacement matched to what is already in the wall.
2) Is the A.Y. McDonald 5141-124 a quarter-turn stop or a multi-turn globe stop?
Quarter-turn. One quarter rotation of the handle takes it from fully open to fully closed, instead of the several turns a globe-style stop needs. For maintenance crews shutting down a line under pressure or in an emergency, that is the practical difference: a single wrist movement rather than cranking a stem down.
3) Is this A.Y. McDonald valve meant for a rough-in behind the wall or for a finished fixture connection?
It is a rough-in component. The 5141-124 series 1 inch quarter-turn valve goes in behind a wall, under a floor, or on a fixture supply run ahead of the finished connection, at the point where the line needs a dedicated shut-off. It is not a decorative escutcheon-and-stop trim set for an exposed fixture supply.
4) Can I use this 1 inch A.Y. McDonald stop on a commercial job, or is it residential only?
Both. The 5141-124 quarter-turn valve is used on residential and light commercial supply runs, typically in new construction rough-in, repipe and renovation work, and as a fixture supply isolation point.
5) Does a plumber need to install this A.Y. McDonald rough-in valve?
It is intended for installation by a licensed plumber or contractor, since it is set into the supply line itself rather than threaded onto a finished stub-out. Property managers replacing one in an occupied unit should plan on shutting down and draining the branch before the valve comes out.
How fast can I get the A.Y. McDonald 74779M-22-1IN 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 74779M-22-1IN come with a warranty?
Absolutely. The A.Y. McDonald 74779M-22-1IN 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 74779M-22-1IN?
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
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