Spears 4129 CPVC CTS Coupling,...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1.65
Spears 437915 CPVC CTS Socket-Type Coupling

Spears 4129 CPVC CTS Coupling, Socket Connection

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Model: 4129-010

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

$1.65
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Spears 437915 CPVC CTS Socket-Type Coupling

The Spears 437915 CPVC CTS Socket-Type Coupling is a socket-style fitting engineered to join CPVC CTS pipe for solvent-welded piping systems. Built from CPVC material for chemical resistance and long service life, this coupling provides a reliable, leak-tight connection point in CTS-dimensioned CPVC piping runs. Socket-type ends allow the coupling to be solvent-welded directly to CPVC CTS pipe on both sides, making it a straightforward solution for extending, repairing, or reconfiguring piping runs without introducing metallic components that can corrode over time. It is a practical choice for contractors, plumbers, and facility maintenance teams standardizing on CPVC CTS piping for water distribution or process applications.

Key Features

  • CTS Sizing: CTS-dimensioned for direct compatibility with CPVC CTS pipe and fittings of the same dimensional standard.
  • Durable Construction: CPVC material delivers strong resistance to corrosion and many chemicals compared to metallic alternatives, supporting a long service life in demanding environments.
  • Socket Connection: Socket-style ends on both sides are designed for solvent-welded joints, producing a permanent, leak-resistant bond once properly primed and cemented.
  • Coupling Function: Joins two lengths of CPVC CTS pipe in a straight run, allowing extension, repair, or modification of existing CPVC CTS piping systems.
  • Lightweight Material: CPVC construction is significantly lighter than comparable metal piping components, easing handling, transport, and installation.
  • Dimensional Consistency: CTS sizing ensures the coupling mates correctly with other CPVC CTS-rated fittings and pipe within the same piping system.

Technical Specifications

  • Department: Electrical
  • Product Subgroup: Pipe Fittings

Typical Applications

  • CPVC CTS Piping Systems
  • Residential and Commercial Plumbing Installations
  • Chemical and Process Piping Runs
  • Pipe Extension and Repair Work
  • Renovation and New Construction Projects
  • Facility Maintenance and Retrofit Piping

Why Spears 437915?

Spears fittings are manufactured from CPVC material for dependable performance in demanding piping applications. This socket coupling reflects a focus on consistent CTS sizing and solvent-weld compatibility, helping installers achieve secure, code-compliant CPVC CTS piping connections for both plumbing and process piping projects. Choosing CPVC construction over metallic alternatives helps piping systems resist corrosion and chemical attack over the long term, reducing maintenance needs and supporting reliable performance across residential, commercial, and industrial installations.

Product Specs

Product Material:
CPVC
Connection Type:
Socket
Product Type:
Coupling
Product Group:
PVC & CPVC Fittings
Department:
Plumbing
Product Subgroup:
Pipe Fittings

Spears 4129-010 – Frequently Asked Questions

1) Is this Spears coupling solvent welded or does it thread on?
Both ends are socket, so it is solvent welded. Clean the pipe, apply CPVC primer and cement rated for CPVC, and insert to the socket shoulder. There are no threads and no gaskets, so once cured the joint is permanent, which is what you want in a concealed wall or ceiling run.
2) What sizes does the Spears 4129 CPVC CTS coupling come in?
The 4129 CTS coupling is offered in three orderable size selections, identified by manufacturer part numbers 4129-010, 4129015, and 4129-020. Order by the MPN that matches the CTS pipe size you are joining so the socket depth and diameter line up.
3) Why use a CPVC coupling instead of a copper coupling on a water line?
A CPVC CTS coupling solvent welds rather than solders, so there is no torch work in the wall and no flux to clean up. CPVC resists corrosion and many chemicals that attack metal, and the fitting is far lighter to carry and hold in place overhead. The tradeoff is that the joint is permanent and needs cure time before pressurizing, where a press or sweat copper joint is ready sooner.
4) Do I need anything besides the coupling to make the joint?
The coupling ships as the fitting only. You supply CPVC primer and CPVC solvent cement, plus a cutter that leaves a square end and a deburring tool. Dry fit first, mark your insertion depth, then prime and cement both the socket and the pipe end.
5) Where can I find the exact socket dimensions and weights for Spears CTS CPVC fittings?
Spears publishes CTS CPVC dimensional data separately from the fitting listing, including a CPVC CTS product dimensions and weights sheet and a CTS CPVC dimensions sheet. Those give the socket bore, laying length, and per-piece weight you need for takeoffs and for checking clearance in a tight joist bay or chase.
6) Does the Spears 437915 coupling change direction or is it straight through?
Straight through. It is a coupling, so it joins two lengths of CPVC CTS pipe in line. For a direction change you need an elbow, and for a branch you need a tee, both in matching CTS CPVC.
How fast can I get the Spears 4129-010 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 Spears 4129-010 come with a warranty?
Absolutely. The Spears 4129-010 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 Spears 4129-010?
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 Spears 4129-010 from ZenSupply?
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