A.Y. McDonald 5120-141 3/4" 50...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$85.71
$35.71
A.Y. McDonald 5120-141 3/4" 503 FLARE X FIP LF ADPT

A.Y. McDonald 5120-141 3/4" 503 Flare x FIP Lead-Free Water Service Adapter

(No reviews yet) Write a Review

Model: 5120-141
Selected Model is

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

$85.71
$35.71
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

A.Y. McDonald 5120-141 3/4" 503 Flare x FIP Lead-Free Water Service Adapter

The A.Y. McDonald 5120-141 is a 3/4" 503 Flare x FIP lead-free adapter engineered for reliable transitions between flare tubing connections and female iron pipe (FIP) threaded fittings in potable water service lines and plumbing distribution systems. Built to A.Y. McDonald's exacting manufacturing standards, this adapter provides a secure, leak-resistant joint for water service and distribution applications where a 503-style flare connection must interface with standard threaded piping. As a lead-free (LF) fitting, the 5120-141 is designed for use in potable water applications where compliance with lead-free plumbing requirements is essential, making it a smart choice for water meter connections, service line transitions, and general plumbing repair work where flare-to-thread compatibility is required.

Key Features

  • Trade Size: 3/4" connection sized for common residential and light commercial water service lines.
  • Connection Type: 503 Flare x FIP configuration allows a secure transition from flared tubing to female iron pipe threads without additional couplings.
  • Lead-Free Construction: Manufactured to meet lead-free (LF) requirements for use in potable water supply systems.
  • Durable Fitting Design: Provides a dependable, long-lasting joint suited to underground and above-ground water service installations.
  • Adapter Function: Simplifies transitions between different piping and fitting types, reducing the number of joints needed in a water service run.
  • Service Line Compatibility: Well-suited to water meter setters, service line entry points, and repair scenarios where flare tubing must terminate into threaded pipe.

Technical Specifications

  • Product Type: General Fitting
  • Size: 3/4"
  • Connection: 503 Flare x FIP
  • Lead-Free: Yes

Typical Applications

  • Potable Water Service Line Installations
  • Residential and Light Commercial Plumbing
  • Water Meter and Service Connections
  • Flare-to-Threaded Pipe Transitions
  • New Construction and Plumbing Repair

Why A.Y. McDonald?

A.Y. McDonald is a trusted manufacturer of waterworks and plumbing fittings, and the 5120-141 lead-free flare x FIP adapter reflects that reliability with a precise 503 flare connection and lead-free construction suited for potable water applications. Choose A.Y. McDonald for dependable, code-conscious fittings built for professional water service installations, backed by a manufacturer with a long history of supplying waterworks products to contractors and utilities.

Manufacturer Resources

Spec Sheet

Product Specs

Department:
Plumbing
Product Group:
Plumbing
Product Subgroup:
Fittings
Product Type:
General Fitting

A.Y. McDonald 5120-141 – Frequently Asked Questions

1) What connections does the A.Y. McDonald 5120-141 adapter have on each end?
The 5120-141 is a 3/4 inch flare by FIP adapter: one end is a 503 flare connection for flared soft copper or poly tubing, the other is female iron pipe thread that takes a 3/4 inch male-threaded pipe or nipple. So it joins a flared tubing run to threaded pipe in one fitting.
2) Is the A.Y. McDonald 5120-141 lead free for potable water service?
Yes. The 5120-141 is designated LF, lead free, which is what water utilities and plumbers need for potable water lines on the service side of the meter.
3) I have 3/4 inch soft copper coming into the building. Do I need a flare nut and sleeve with the 5120-141?
The flare end on the 5120-141 is a 503 flare, so the copper or poly tubing has to be flared and drawn up with a flare nut. On a flare-by-FIP adapter like this the nut is what pulls the tube against the seat, so plan on the matching 3/4 inch flare nut (and an insert stiffener if you are flaring poly) as separate items.
4) Should I use a flare x FIP adapter or a compression fitting on a water service line?
Flare, like the 503 flare end on the A.Y. McDonald 5120-141, is the usual choice for buried or pit water service because the joint is metal-to-metal and can be broken and remade without a new gasket. Compression connections are quicker to make in the field but are generally used where the joint stays accessible. If the drawing or the utility spec calls out flare, the 5120-141 with its 3/4 inch FIP outlet is the piece that gets you onto threaded pipe.
5) What part number do I order for the 3/4 inch A.Y. McDonald flare to female pipe thread adapter?
Order A.Y. McDonald part 5120-141. That is the 3/4 inch 503 flare by FIP lead free adapter, sold as a single model with no size or finish options to specify.
How fast can I get the A.Y. McDonald 5120-141 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 5120-141 come with a warranty?
Absolutely. The A.Y. McDonald 5120-141 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 5120-141?
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 5120-141 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!