Skip to content
White Schedule 40 PVC slip union on a white background showing socket ends and the external union nut, highlighting form and finish.

Schedule 40 PVC Slip Union (Slip x Slip) with Buna O-Ring Seal

Brand: PVC
Save 25%
$8.62
$6.47
SKU 457-007
In Stock (18)

Notify me when back in stock

Schedule 40 PVC Slip Unions provide a removable, reliable connection between two smooth pipe ends. Built from durable PVC, these unions feature socket (slip) ends and a compressible Buna-N O-ring that creates a watertight seal while allowing quick disassembly for service or repairs. Available across common nominal sizes, they are suitable for irrigation, pool and spa, and potable water systems where NSF/ANSI compliance is required.

  • Material & Construction: Injection-molded Schedule 40 PVC resists corrosion and chemical attack for long service life.
  • Seal: Buna-N (Nitrile) O-ring provides a tight, reusable seal without thread sealants.
  • Certifications: Meets NSF/ANSI 14 and 61 requirements for potable water components where specified.
  • Temperature: Designed for typical PVC service temperatures up to 140°F (60°C).
  • Sizes: Nominal sizes range from 1/2" through 4" to fit common plumbing and irrigation lines.
  • Serviceability: Union halves screw together for tool-free assembly and rapid disassembly for maintenance.

These slip unions are ideal when you need a secure yet serviceable joint. For permanent socket connections use a compatible PVC solvent cement; for removable connections rely on the O-ring seal and hand-tightening of the union halves. Inspect the O-ring periodically and replace if worn to maintain leak-free performance.

Reviews

Frequently Asked Questions

What sizes are available for this Schedule 40 PVC slip union?
Available in nominal sizes from 1/2" through 4" (includes 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 4").
How does the union create a leak-proof seal?
A compressible Buna-N (Nitrile) O-ring seats in the socket and is compressed when the union halves are tightened, creating a reusable watertight seal.
Is this union safe for potable (drinking) water systems?
Yes. These unions meet NSF/ANSI 14 and 61 requirements for potable water components where specified.
How should I install and maintain the slip union?
Hand-tighten the union halves for removable service; use compatible PVC solvent cement for permanent socket joints. Inspect and replace the O-ring if worn.