A.Y. McDonald 5135-025 Dual Ch...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$206.98
A.Y. McDonald 5135-025 Dual Check Valve Backflow Preventer, 5/8" Yoke x 3/4" CTS, No-Lead

A.Y. McDonald 5135-025 Dual Check Valve Backflow Preventer, 5/8" Yoke x 3/4" CTS, No-Lead

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Model: 5135-025

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

$206.98
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A.Y. McDonald 5135-025 Dual Check Valve Backflow Preventer, 5/8" Yoke x 3/4" CTS, No-Lead

The A.Y. McDonald 5135-025 (model 7112-3YQ) is an inline dual check valve backflow preventer built for water meter yoke installations, connecting a 5/8" meter yoke to a 3/4" CTS (copper tube size) service line. This inline check valve assembly is designed to help prevent backflow of non-potable water into the potable water supply at the meter setting, a common rough-in requirement for water utility and plumbing contractors setting residential meters. The No-Lead designation on this dual check valve means the wetted surface materials are formulated for potable water service in accordance with lead-free requirements. As a compact inline unit, it installs directly at the meter yoke without requiring additional fittings beyond the stated connection sizes, simplifying the rough-in at the point of service.

Key Features

  • Trade Size: 5/8" yoke connection x 3/4" CTS outlet, sized for standard residential water meter settings.
  • Dual Check Configuration: Inline dual check valve (ADCHK/INLNCK) design provides two independent check elements in a single body for backflow protection at the meter.
  • No-Lead Construction: Manufactured to No-Lead specifications for potable water applications.
  • Yoke-to-CTS Connection: Direct yoke inlet paired with a 3/4" CTS outlet for straightforward connection to copper tube size service piping.
  • Compact Inline Body: Designed to fit within the meter yoke assembly without adding significant length to the service line rough-in.
  • A.Y. McDonald Manufacturing: Produced by A.Y. McDonald, a long-established manufacturer of waterworks and plumbing brass products for municipal and contractor use.

Certifications & Compliance

  • No-Lead / Lead-Free Compliant for potable water service

Technical Specifications

  • Model: 7112-3YQ
  • SKU: 5135-025
  • Connection: 5/8" Yoke x 3/4" CTS
  • Type: Dual Check, Inline
  • Lead Status: No-Lead

Typical Applications

  • Residential Water Meter Yoke Installations
  • Backflow Protection at the Point of Service Connection
  • Water Utility and Municipal Service Line Rough-In
  • New Construction and Meter Replacement Projects
  • Copper Tube Size (CTS) Service Line Connections

Why A.Y. McDonald?

A.Y. McDonald manufactures waterworks brass and plumbing components used by contractors and utilities for dependable service line and meter connections. The 5135-025 dual check valve combines a No-Lead bronze construction with a purpose-built 5/8" yoke x 3/4" CTS connection, giving plumbing and utility crews a straightforward, code-relevant component for meter-set backflow protection without added rough-in complexity.

Manufacturer Resources

Product Specs

list_batch:
AYM-20260924
Product Type:
Dual Check Valve
Connection Type:
Yoke x CTS
Standards:
No-Lead
Department:
Plumbing
Product Group:
Plumbing
Product Subgroup:
Fittings and Valves
Product Material:
Bronze
Product Size:
5/8" Yoke x 3/4" CTS

A.Y. McDonald 5135-025 – Frequently Asked Questions

1) Will the A.Y. McDonald 5135-025 dual check valve connect a 5/8 inch meter yoke to 3/4 inch copper service line?
That is exactly the connection it is built for. The 5135-025 has a 5/8 inch yoke inlet and a 3/4 inch CTS (copper tube size) outlet, so it drops straight into a standard residential meter setting and lands on 3/4 inch copper service pipe. No adapters needed beyond those two stated sizes. If your meter yoke is a different size, or the service line is CTS polyethylene of another diameter, this is not the right body.
2) Is the 5135-025 dual check valve lead-free for potable water?
It carries A.Y. McDonald's No-Lead designation, meaning the wetted surfaces are formulated for potable water service under lead-free requirements. That is the version utilities and inspectors expect on a domestic meter set. The body is bronze.
3) What is the difference between a dual check valve at the meter and a full backflow preventer assembly?
A dual check like the 5135-025 puts two independent check elements in one compact inline body and sits right at the meter yoke, giving basic backflow protection at the point of service. It is the standard residential meter-set solution. It is not a testable reduced pressure or double check detector assembly with shutoffs and test cocks, so if your jurisdiction requires a testable assembly for a commercial service, fire line, or a high hazard cross-connection, this unit will not satisfy that requirement.
4) Do I need to order anything else to install the 5135-025 at a residential meter set?
Nothing beyond the stated connections. The valve is a compact inline body that mounts directly at the meter yoke, so your only other parts are whatever the 3/4 inch CTS outlet needs on the service side. It does not add meaningful length to the rough-in, which matters when the meter pit or setter has fixed spacing.
5) Is A.Y. McDonald 7112-3YQ the same valve as the 5135-025?
Same part. 5135-025 is the ordering number and 7112-3YQ is the A.Y. McDonald model designation for the No-Lead dual check, 5/8 inch yoke by 3/4 inch CTS. If a spec sheet or utility standard lists either one, you are looking at the same valve.
6) Can I use this dual check valve on a meter replacement, or is it only for new construction?
Both. The 5135-025 is used on new residential meter sets, meter change-outs, and utility service line rough-ins, as long as the yoke is 5/8 inch and you are tying into 3/4 inch CTS copper. On a retrofit, confirm the existing yoke size before ordering, since a 3/4 inch yoke setting needs a different body.
7) Is a bronze dual check valve suitable for a buried meter pit?
The 5135-025 is a bronze waterworks body, which is what utilities normally specify for the wet, buried environment of a meter pit or setter. It is a valve only, though, with no freeze or thermal expansion accommodation, so on a closed system a dual check can trap expansion pressure and a thermal expansion tank on the water heater may be needed.
How fast can I get the A.Y. McDonald 5135-025 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 5135-025 come with a warranty?
Absolutely. The A.Y. McDonald 5135-025 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 5135-025?
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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