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White PVC hub coupling trap, 4-inch schedule 40 fitting

Mueller Industries, Inc.

Mueller Industries, Inc. 1WKH5 4" Hub PVC DWV Coupling Trap

SKU CH-RGSD-EMFWB MPN 1WKH5

A white PVC Schedule 40 drain coupling with a 4-inch hub connection, rated to 140 degrees F and meeting ASTM D1784 cell class 12454

  • Product typeDrain Components
  • Product colorWhite
  • Schedule 40 PVC resists corrosion for long drain life
  • Hub connection fits 4-inch pipe without extra adapters
  • White finish matches standard DWV piping for clean installs
  • Rated to 140 °F for reliable hot-water drainage
  • Meets ASTM D1784 cell class 12454 for code compliance

4-inch PVC DWV Coupling

This white Schedule 40 PVC coupling connects two 4-inch hub pipes in drain, waste and vent systems. It meets ASTM D1784 cell class 12454 for material quality. The fitting is not rated for pressure applications and handles temperatures up to 140 degrees Fahrenheit. Plumbers and DIY installers use it for gravity-flow drainage upgrades.

Replaces damaged or misaligned hub joints

Swap out a cracked coupling or correct a slope error without changing the pipe run. The hub-to-hub design slides over existing 4-inch PVC pipe for a solvent-weld repair. The upgrade is worth it when the old joint leaks, separates or fails inspection. It does not serve pressurised supply lines or hot-water distribution.

Verify pipe size and local code acceptance

Confirm the existing pipe measures 4-inch nominal diameter and uses hub connections. Check that Schedule 40 PVC DWV fittings are approved for the project by the authority having jurisdiction. Ensure solvent cement and primer compatible with PVC are available for installation. The coupling is unsuitable for threaded, compression or press-fit systems.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 93% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameMueller Industries
Model name1WKH5
Product typeDrain Components
Product colorWhite

Questions about this item

What pipe size does the 4" hub coupling fit?

The hub accepts 4 in PVC pipe with a Schedule 40 wall thickness.

How is the hub connection made and what step is often missed?

Apply PVC primer and cement to both the pipe end and the hub socket, then push fully home and hold briefly; the step often missed is using primer before the cement.

What temperature limit should I watch for if the line carries hot discharge?

The PVC material is rated to a maximum of 140 Degrees F, so avoid continuous flow hotter than that.

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