A.Y. McDonald 5121 CTS x CTS x...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$255.61
A.Y. McDonald 5121 CTS x CTS x CTS No-Lead Tee

A.Y. McDonald 5121 CTS x CTS x CTS No-Lead Tee

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Model: 5121-124

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

$255.61
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A.Y. McDonald 5121 CTS x CTS x CTS No-Lead Tee

The A.Y. McDonald 5121 (model 74760-22) is a 1 1/2" tee fitting configured CTS x CTS x CTS, engineered to meet No-Lead (NL) compliance standards for potable water applications. This three-way tee fitting allows installers to branch a water line into a secondary run while maintaining consistent CTS (Copper Tube Size) connections on all three ports, making it a straightforward solution for service line branching, distribution runs, and general water system installations. Built by A.Y. McDonald, a trusted name in waterworks and plumbing fittings, the 5121 tee is designed for reliable, code-compliant performance in municipal and commercial water infrastructure projects. The uniform 1 1/2" CTS sizing across all three connection points simplifies fitting selection and ensures compatible mating with standard CTS tubing and fittings throughout the run. Whether used for new construction water main branching or repair work on existing service lines, the 5121 tee delivers the consistent, dependable connection contractors and municipal crews expect from A.Y. McDonald waterworks products.

Key Features

  • Trade Size: 1 1/2" for standard CTS water line branching applications.
  • Configuration: CTS x CTS x CTS three-way tee connection for consistent compatibility across all ports.
  • No-Lead Compliance: CTS-NL designation supports potable water safety requirements.
  • Branching Function: Enables a single water line to split into a secondary distribution run without changing tube size.
  • Uniform Sizing: All three connections share the same 1 1/2" CTS dimension, simplifying installation and inventory.
  • Model Reference: Manufactured as A.Y. McDonald 74760-22 for direct cross-reference and ordering accuracy.

Technical Specifications

  • Product Type: Tee
  • Configuration: CTS x CTS x CTS
  • Trade Size: 1 1/2"
  • Lead Compliance: No-Lead (NL)

Typical Applications

  • Potable Water Service Line Branching
  • Municipal and Commercial Water Distribution
  • Underground Water Main Fittings
  • CTS Tubing System Installations
  • New Construction and Water System Repairs

Why A.Y. McDonald?

A.Y. McDonald is a long-standing manufacturer of waterworks fittings, valves, and brass products trusted by contractors and municipalities for consistent, code-compliant performance. The 5121 tee's No-Lead (CTS-NL) construction reflects the brand's commitment to potable water safety, while its uniform CTS sizing across all three connections ensures dependable, leak-resistant branching in demanding water infrastructure applications.

Manufacturer Resources

Product Specs

Product Subgroup:
Pipe Fittings
Product Group:
Plumbing
Department:
Plumbing
Product Type:
Tee

A.Y. McDonald 5121-124 – Frequently Asked Questions

1) What sizes does the A.Y. McDonald 74760-22 CTS tee come in?
Two sizes: 1-1/2 inch and 2 inch. The 1-1/2 inch is part number 5121-124 and the 2 inch is 5121-125. Both are straight tees with all three outlets the same size, so there is no reducing configuration here.
2) Will this A.Y. McDonald tee connect to my PE or PVC water service pipe?
Only to CTS-sized tubing. All three ends of the 74760-22 are CTS (copper tube size) connections, so the pipe you are joining has to be CTS outside diameter. IPS-sized polyethylene or PVC water service pipe will not seat correctly in a CTS end, and you would need an IPS fitting or a CTS-to-IPS transition instead.
3) Is this A.Y. McDonald tee safe for potable drinking water lines?
It is a no-lead fitting, which is what the NL in 74760-22 TEE CTS X CTS X CTS-NL stands for. That is the configuration municipalities and water utilities specify for potable water service work.
4) What is the difference between a CTS tee and a compression tee for water service work?
A CTS tee like the 74760-22 is sized to copper tube size tubing on every branch, so it drops into a run where the main and the branch are all the same CTS diameter. If your service line is IPS plastic, or you need to step down to a smaller branch, this straight 1-1/2 or 2 inch tee is the wrong part and you want a reducing or transition fitting instead.
5) Which part number do I order for a 2 inch A.Y. McDonald CTS tee?
Order 5121-125 for the 2 inch. The 1-1/2 inch equivalent is 5121-124. Both are the same no-lead CTS tee, only the size differs, so the number is the only thing you need to change on the order.
6) Can I use this tee to branch off a buried water service line?
Yes, that is what an A.Y. McDonald CTS tee is built for: taking a branch off a water service run where all three legs are CTS tubing of the same size. Confirm your main is 1-1/2 or 2 inch CTS, because those are the only two sizes this tee is made in, and a mismatch on any one leg means a different fitting.
How fast can I get the A.Y. McDonald 5121-124 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 5121-124 come with a warranty?
Absolutely. The A.Y. McDonald 5121-124 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 5121-124?
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 5121-124 from ZenSupply?
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