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Gray SPEARS 1429-129 PVC reducing coupling (insert to spiral barb), 1-inch insert to 3/8-inch spiral barb, product side view, plastic fitting

SPEARS 1429-129 PVC Insert x Spiral Barb Coupling - 1" x 3/8"

Brand: SPEARS
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$3.32
$2.49
SKU 1429-129
In Stock (1523)

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SPEARS 1429-129 PVC Insert x Spiral Barb Coupling is engineered to create a secure, leak-resistant transition between 1" polyethylene insert pipe and 3/8" spiral-barb tubing. Manufactured from rigid, corrosion-resistant PVC, this reducing coupling provides positive grip and straightforward installation for irrigation, landscape, and potable water distribution systems.

  • Meets ASTM D2609 for plastic insert fittings, ensuring dimensional and material reliability.
  • Designed for use with ASTM D2104 Schedule 40 or ASTM D2239 SIDR polyethylene pipe sizes.
  • Insert x spiral-barb joint offers clamp-free twist-lock engagement and strong axial retention.
  • Compatible with crimp and worm-gear hose clamps when additional mechanical restraint is desired.
  • NSF-certified for potable water service, suitable for residential and light commercial irrigation systems.
  • Gray PVC construction resists common irrigation chemicals and is rated for underground installation.

Model 1429-129 simplifies installations where a reducing connection is required: the 1" insert end fits standard polyethylene pipe while the 3/8" spiral barb accepts small-diameter tubing used for drip, micro-irrigation, and service lines. The coupling is sold individually and is intended for use in systems designed to accepted polyethylene insert fittings and barbed connections. Follow local plumbing codes and manufacturer instructions when installing; use clamps where specified for added security.

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Frequently Asked Questions

What pipe sizes does this coupling connect?
This reducing coupling connects a 1" polyethylene insert to a 3/8" spiral-barb tube; use with matching poly pipe and tubing.
Is this fitting safe for potable water?
Yes. The SPEARS 1429-129 is NSF certified for potable water when installed per codes and manufacturer guidance.
Do I need clamps with the spiral barb connection?
The spiral-barb design provides a strong twist-lock grip, but crimp or worm-gear clamps can be used for added mechanical security if required.

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