A.Y. McDonald 304K Pentagon Cu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$16.62
A.Y. McDonald 304K Pentagon Curb Stop Key

A.Y. McDonald 304K Pentagon Curb Stop Key

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Model: 304K

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

$16.62
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A.Y. McDonald 304K Pentagon Curb Stop Key

The A.Y. McDonald 304K is a pentagon-head curb stop key built for utility crews, plumbers, and municipal water departments who need reliable access to underground curb stops and shutoff valves. This pentagon key mates with the standard five-sided operating nut found on A.Y. McDonald curb stops and many other waterworks shutoff valves, allowing a technician to turn the valve on or off from grade level through a curb box without excavation. The pentagon-shaped socket is a common configuration used across the waterworks industry to prevent unauthorized tampering with residential and commercial water service shutoffs, and the 304K key is sized and shaped to engage that pentagon nut securely so the operator can apply consistent, controlled torque without slipping off the fitting.

Key Features

  • Pentagon Configuration: The operating end of the key is machined to the pentagon profile used on A.Y. McDonald curb stops and compatible waterworks valve nuts, providing a secure, non-rounding grip during operation.
  • Purpose-Built for Curb Stop Operation: Designed specifically to turn buried or below-grade curb stop valves via a curb box, making it a standard tool for water utility and plumbing service trucks.
  • A.Y. McDonald Compatibility: Manufactured by A.Y. McDonald to correctly fit the operating nuts on A.Y. McDonald curb stop valves, helping ensure a proper, dependable engagement every time the valve is actuated.
  • Rough-In and Underground Service Use: Intended for use in the field on buried water service lines, where the curb stop is accessed through a curb box rather than an above-ground handle or lever.
  • Durable Tool Construction: Built as a dedicated valve key for repeated field use by plumbing contractors and utility locate/turn-on crews rather than as a one-time or disposable accessory.

Technical Specifications

  • list_batch: AYM-20260924

Typical Applications

  • Water Utility Service Turn-On and Turn-Off
  • Curb Stop and Curb Box Valve Operation
  • Residential and Commercial Water Service Rough-In
  • Plumbing Contractor Underground Shutoff Access
  • Municipal Waterworks Field Maintenance

Why A.Y. McDonald?

A.Y. McDonald is a long-established name in waterworks and plumbing rough-in hardware, and the 304K pentagon key is built to properly engage the operating nuts on A.Y. McDonald curb stops for dependable field use. Choosing a key matched to the manufacturer's own valve geometry helps utility crews and plumbing contractors avoid slipped or rounded-off operating nuts in the field. Stock the A.Y. McDonald 304K pentagon key alongside your curb stops and service line fittings for a complete underground water service rough-in setup.

Manufacturer Resources

Product Specs

list_batch:
AYM-20260924
Product Type:
Pentagon Curb Stop Key
Configuration:
Pentagon
Department:
Plumbing
Product Group:
Plumbing
Product Subgroup:
Plumbing

A.Y. McDonald 304K – Frequently Asked Questions

1) Will the A.Y. McDonald 304K key fit the pentagon nut on my curb stop?
The 304K is machined to the pentagon (five-sided) operating nut profile used on A.Y. McDonald curb stops and the compatible waterworks shutoff valves that share that standard pentagon nut. If the nut down in your curb box is five-sided, this key engages it. If you're looking at a square or round operating nut, this is the wrong key.
2) Can I shut off a buried water service with this key without digging up the curb stop?
That's the whole point of it. The 304K reaches down through the curb box from grade and turns the buried curb stop on or off, so no excavation is needed to operate the valve. It's the standard tool on water utility and plumbing service trucks for turn-ons, turn-offs, and municipal field maintenance.
3) What's the difference between a pentagon curb stop key and a regular valve wrench?
A pentagon key has a five-sided socket cut to match the tamper-resistant operating nut the waterworks industry puts on residential and commercial service shutoffs. A generic wrench or pliers will cam off that nut and round it. The 304K's pentagon socket seats on the nut so you can apply steady torque without slipping. For square-nut gate valves in a valve box you'd want a square-socket valve key instead.
4) Is the 304K meant for daily field use or is it a one-time tool?
It's built as a dedicated valve key for repeated field use by plumbing contractors and utility turn-on crews, not a disposable accessory. Crews running service turn-ons all day carry one on the truck.
5) Should I stock this with my curb stops and service line fittings?
Yes, and most water service rough-in packages do. Buying a key matched to the manufacturer's own valve geometry is how crews avoid rounding off operating nuts in the field, so the 304K pairs naturally with A.Y. McDonald curb stops and underground service fittings on a residential or commercial water service install.
How fast can I get the A.Y. McDonald 304K 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 304K come with a warranty?
Absolutely. The A.Y. McDonald 304K 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 304K?
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 304K from ZenSupply?
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