A.Y. McDonald 5139491 74642BYD...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$137.04
A.Y. McDonald 5139491 74642BYD Angle Ball Supply Stop with Pentagon Handle, Floor x Yoke, No-Lead

A.Y. McDonald 5139491 74642BYD Angle Ball Supply Stop with Pentagon Handle, Floor x Yoke, No-Lead

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Model: 5139491

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

$137.04
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A.Y. McDonald 5139491 74642BYD Angle Ball Supply Stop with Pentagon Handle, Floor x Yoke, No-Lead

The A.Y. McDonald 5139491 (model 74642BYD) is an angle ball supply stop built for rough-in and finish plumbing where a floor-mounted supply must connect to a yoke fitting. This valve is configured 3/4" x 5/8" and features a full-port ball design for reliable on/off control, a pentagon-style handle commonly specified for public and commercial restroom installations, and a drain feature for winterization or service shutdown. The No-Lead designation identifies this stop as compliant with low-lead plumbing requirements for potable water applications. Plumbers and contractors installing floor-supplied fixtures with a yoke connection can use this angle ball stop to isolate water supply while maintaining a compact, code-conscious footprint behind the wall or beneath the floor.

Key Features

  • Trade Size: 3/4" x 5/8" connection sizing for floor-to-yoke supply installations.
  • Angle Configuration: Angle-pattern ball valve body directs supply flow from a floor connection to a yoke outlet.
  • Ball Valve Shutoff: Full-port ball mechanism provides positive, quarter-turn on/off control of the water supply.
  • Pentagon Handle: Pentagon-style operating handle, a configuration commonly required for institutional and public-facility supply stops.
  • Drain Feature: Integrated drain allows the line to be purged or drained down for service or seasonal shutdown.
  • Floor x Yoke Connection: Configured for floor-supply piping terminating into a yoke fitting, suited to fixture rough-ins that require this arrangement.
  • No-Lead Construction: Manufactured to No-Lead specification for potable water supply stop applications.

Certifications & Compliance

  • No-Lead

Technical Specifications

  • Model Number: 74642BYD
  • Connection Size: 3/4" x 5/8"
  • Configuration: Angle Ball, Floor x Yoke
  • Handle Type: Pentagon
  • Feature: Drain
  • Lead Compliance: No-Lead

Typical Applications

  • Floor-mounted fixture supply rough-in
  • Public and commercial restroom fixture supply shutoffs
  • Yoke-connected supply installations
  • Water supply isolation for service and winterization
  • Potable water supply stop replacement

Why A.Y. McDonald?

A.Y. McDonald supply stops are built with No-Lead construction and a full-port ball shutoff design for dependable, code-conscious performance in potable water rough-in work. The pentagon handle and drain feature on this angle ball stop reflect the specific configuration plumbers need for floor-to-yoke fixture supply installations. Choose the A.Y. McDonald 74642BYD when your job calls for a No-Lead angle ball stop sized and configured for this exact connection type.

Manufacturer Resources

Product Specs

list_batch:
AYM-20260924
Product Type:
Supply Stop
Configuration:
Angle Ball, Floor x Yoke
Standards:
No-Lead
Department:
Plumbing
Product Group:
Plumbing
Product Subgroup:
Plumbing
Product Size:
3/4" x 5/8"

A.Y. McDonald 5139491 – Frequently Asked Questions

1) What connection sizes does the A.Y. McDonald 74642BYD angle supply stop have, and which end goes where?
The 74642BYD is sized 3/4" x 5/8" in a Floor x Yoke arrangement: the 3/4" side takes the floor-supply piping and the 5/8" side lands on the yoke fitting. It is an angle pattern, so flow turns from the floor connection out to the yoke. If your rough-in comes out of the wall rather than the floor, or terminates in a compression riser instead of a yoke, this is not the right stop.
2) Is the A.Y. McDonald 5139491 supply stop safe for potable drinking water lines?
Yes. The 5139491 (model 74642BYD) carries the No-Lead designation, which is what lets it be used on potable water supply in jurisdictions enforcing low-lead requirements. That covers both new fixture rough-in and replacement of an older stop on a drinking-water line.
3) Why does this A.Y. McDonald stop have a pentagon handle instead of a normal lever or wheel?
The pentagon handle is a tamper-deterrent shape: it takes a pentagon socket wrench to operate, so the public cannot shut the fixture off. That is why it gets specified in institutional and public restroom work. If you want a stop a tenant or janitor can turn by hand, order a lever-handle version instead, because on the 74642BYD nobody turns it without the wrench.
4) I'm replacing an existing yoke supply stop on a commercial water closet. How do I know the 5139491 matches?
Match three things on the old stop: the inlet must be a 3/4" floor connection, the outlet must be 5/8" landing on a yoke, and the body must be angle pattern rather than straight. If all three agree, the 74642BYD drops into the same rough-in. Note that it comes with a pentagon handle, so if the existing stop had a lever the fixture will now need a pentagon wrench for service.
5) What is the drain feature on the 74642BYD angle ball stop actually for?
The integrated drain lets you bleed the downstream line after you close the valve, so you can pull a fixture without a bucket of trapped water coming with it, or drain the riser down for a seasonal shutdown in an unheated building. Without the drain option you would have to break the connection to get the water out.
6) Ball stop or compression/multi-turn stop for a commercial fixture supply, which should I use?
A ball type like the 74642BYD gives a quarter-turn, full-port shutoff, so the handle position tells you at a glance whether the line is open and the port does not restrict flow. Multi-turn stops with washers and packing are the ones that seize or weep after years untouched, which is why ball stops get specified on openings that get serviced. The trade-off is you need the right configuration up front, here Floor x Yoke at 3/4" x 5/8", since there is no adapting an angle ball body to another arrangement.
7) Can I standardize all the restroom supply stops in my building on this A.Y. McDonald part?
Only where the rough-in is floor-fed into a yoke at 3/4" x 5/8". The 74642BYD is a fixed configuration, so wall-fed fixtures or different pipe sizes need other models in the A.Y. McDonald line. Where the openings do match, standardizing on one pentagon-handle stop means one wrench in the maintenance kit and one part to stock for the whole facility.
8) Does the A.Y. McDonald 74642BYD come in other sizes or handle styles?
Part 5139491 is a single fixed configuration: 3/4" x 5/8", Floor x Yoke, angle ball, pentagon handle with drain. There are no size or handle options to choose on this part number. A different size or a lever handle means a different A.Y. McDonald model number.
How fast can I get the A.Y. McDonald 5139491 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 5139491 come with a warranty?
Absolutely. The A.Y. McDonald 5139491 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 5139491?
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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