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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

  • Product typeDrain Components
  • Product 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.

How it compares

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

Price $3.99
Cheaper than about 95% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameMueller Industries
Model name1WKU3
Product typeDrain Components
Product colorWhite

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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