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White PVC trap adapter with nut and washer, hub and socket ends

Mueller Industries, Inc.

Mueller Industries, Inc. 1WKU3 PVC trap adapter

SKU CH-QKDH-4JX3A MPN 1WKU3

White PVC Schedule 40 trap adapter connects 1 1/2 inch and 1 1/4 inch pipes with included nut and washer for gravity flow systems

  • TypeDrain Components
  • ColorWhite
  • Schedule 40 PVC handles gravity drainage reliably
  • 1-1/2 in and 1-1/4 in sockets fit two pipe sizes
  • Female hub design simplifies trap connections
  • White finish matches standard plumbing installations
  • Operates from -20 °F to 140 °F

PVC Schedule 40 trap adapter

This PVC Schedule 40 trap adapter connects a 1 1/2 in hub to a 1 1/4 in socket for gravity-flow drainage. It is intended for residential or light commercial plumbing installations where solvent-weld joints are required.

Capacity and headroom

The fitting accepts pipe outside diameters of 1 21/32 in and 1 29/32 in, matching standard Schedule 40 dimensions. It handles typical sink and lavatory drain loads but is not rated for pressurised systems or high-temperature discharge beyond its specified range.

Temperature and pressure limits

Maximum operating temperature is 140 Degrees F with a lower limit of -20 Degrees F, suitable for normal waste lines. Gravity-flow pressure rating means it cannot be used in pumped or pressurised applications, and the seal is not included in the package.

Highlights

  • Schedule 40 PVC handles gravity drainage reliably
  • 1-1/2 in and 1-1/4 in sockets fit two pipe sizes
  • Female hub design simplifies trap connections
  • White finish matches standard plumbing installations
  • Operates from -20 °F to 140 °F

Specifications

TypeDrain Components
ColorWhite
BrandMueller Industries
Model1WKU3

Questions about this item

Will the 1 1/2 in hub on this Mueller 1WKU3 adapter fit my existing Schedule 40 PVC drain pipe?

Yes, the hub is sized for 1 1/2 in Schedule 40 pipe with a 1 21/32 in outside diameter, matching standard PVC drain sizing.

How can I confirm the joint is watertight after installing the 1WKU3 trap adapter?

Run water through the drain and inspect the slip-nut connection at the 1 1/4 in socket; no drips means the included washer is sealing correctly.

Does the 1WKU3 package come with the slip washer, or do I need to buy one separately?

The adapter includes the slip nut and washer, so no extra sealing parts are required for the 1 1/4 in socket connection.

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