A.Y. McDonald 74758-33 PEP x P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$50.69
A.Y. McDonald 74758-33 PEP x PEP Compression Coupling

A.Y. McDonald 74758-33 PEP x PEP Compression Coupling

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Model: 74758-33-3/4

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

$50.69
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A.Y. McDonald 74758-33-1IN 1" PEP Compression Coupling

The A.Y. McDonald 74758-33-1IN is a 1" PEP-style compression coupling (McDonald reference 5142-127) built for joining polyethylene (PE) pipe runs in underground water service applications. This rough-in fitting uses a compression connection designed to grip and seal PE pipe without soldering, threading, or specialty crimping tools, making it a fast, reliable option for water-service technicians and utility contractors working on buried supply lines. As a straight coupling, it is intended to join two lengths of like-sized PE pipe in a single run, restoring line continuity after a repair or extending an existing service line.

Key Features

  • Trade Size: 1" nominal size for use on matching 1" PE pipe runs.
  • Coupling Configuration: Straight PEP-style coupling joins two sections of PE pipe in-line, restoring a continuous water service run.
  • Compression Connection: Mechanical compression joint design allows installation without soldering, solvent welding, or specialty crimp tooling, speeding up trench-side installation.
  • Rough-In Application: Purpose-built for behind-the-wall and underground water service work rather than exposed decorative plumbing.
  • A.Y. McDonald Reference: Cross-referenced to A.Y. McDonald part number 5142-127 for accurate ordering and stock matching.

Technical Specifications

  • Trade Size: 1"
  • Type: PEP Compression Coupling
  • Manufacturer Cross-Reference: 5142-127

Typical Applications

  • Underground Water Service Line Repair
  • Extending Existing PE Pipe Runs
  • Residential and Commercial Water Service Installation
  • Utility and Municipal Water Line Work
  • Behind-the-Wall and Buried Rough-In Plumbing

Why A.Y. McDonald?

A.Y. McDonald is a long-standing name in water works and plumbing supply, and the 74758-33-1IN coupling reflects that trade-focused engineering with a straightforward compression design meant to hold up in demanding trench and rough-in environments. Contractors specifying A.Y. McDonald fittings by manufacturer reference number, like 5142-127, can order with confidence that the part will match existing water service infrastructure. Stock this coupling for dependable, tool-light joining of 1" PE pipe on your next service line repair or installation.

Manufacturer Resources

Product Specs

Product Subgroup:
Pipe Fittings
list_batch:
AYM-20260924
Product Group:
Plumbing
Standards:
No-Lead
Product Type:
Coupling
Department:
Plumbing

A.Y. McDonald 74758-33-3/4 – Frequently Asked Questions

1) Do I need special crimp tools or a torch to install this PE pipe coupling?
No. The 74758-33 uses a mechanical compression joint, so it grips and seals polyethylene pipe without soldering, threading, solvent welding, or specialty crimp tooling. That is the point of the design, it goes together trench-side with hand tools, which matters when you are making a repair in an open ditch on a live service.
2) Is the A.Y. McDonald 74758-33 coupling lead free for potable water service?
It is a No-Lead fitting, which is what a municipal or utility inspector expects on a potable water service line. It is built for underground water service work, residential, commercial and municipal.
3) Can I use this coupling to join copper or PVC water service pipe?
No. The 74758-33 is a PEP x PEP coupling, meaning both ends take polyethylene (PE) pipe of the same nominal size. For copper, PVC or a transition to another material you need a different fitting body, not this one.
4) What A.Y. McDonald part number does the 1 inch 74758-33 cross to?
The 1 inch version cross-references to A.Y. McDonald 5142-127. If your job spec or existing stock list calls out 5142-127, ordering 74758-33-1IN gets you the same 1 inch PEP compression coupling.
5) Can this coupling be buried, or does it need to stay accessible?
It is a rough-in fitting made for buried and behind-the-wall water service work rather than exposed finish plumbing. Typical uses are repairing a broken underground service line, extending an existing PE run, and new service installation on residential, commercial and municipal jobs.
6) I cut out a bad section of 1 inch poly water line. Is a straight coupling what I need?
For a straight in-line repair, yes. The 1 inch 74758-33 is a straight PEP coupling that restores line continuity after you cut out a damaged section, as long as both sides of the cut are 1 inch PE. If the run changes size or direction, or you need a branch, this is the wrong fitting shape.
How fast can I get the A.Y. McDonald 74758-33-3/4 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 74758-33-3/4 come with a warranty?
Absolutely. The A.Y. McDonald 74758-33-3/4 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 74758-33-3/4?
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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