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White PVC cleanout adapter with FNPT x spigot connections

Mueller Industries, Inc.

Mueller Industries, Inc. 1WKF9 1-1/2" FNPT x Spigot PVC DWV Cleanout Adapter trap

SKU CH-NTK9-2QYAY MPN 1WKF9

White PVC DWV cleanout adapter connects 1-1/2 inch FNPT to spigot for drain, waste and vent systems

  • TypeDrain Components
  • ColorWhite
  • Schedule 40 PVC handles 140 °F continuous service
  • FNPT x spigot connects threaded and solvent-weld lines
  • ASTM D1784 cell class 12454 material rating
  • White finish matches standard DWV piping
  • Cleanout adapter allows easy drain access

PVC Cleanout Adapter

This Mueller Industries fitting connects a 1-1/2 inch FNPT threaded pipe to a spigot end in drain, waste and vent systems. It is made from white Schedule 40 PVC and meets ASTM D1784 cell class 12454 for standard plumbing installations.

Non-Pressure DWV Capacity

The adapter handles gravity-flow drainage up to 140 degrees F and is not rated for pressure applications. It provides reliable joint sealing in vent and waste lines but cannot be used where internal pressure exceeds atmospheric conditions.

Replaces Threaded Cleanout Fittings

This part upgrades older metal or mismatched plastic cleanout connections with a uniform PVC joint. The change is worthwhile when a corrosion-resistant, code-compliant transition between threaded and solvent-weld pipe is required.

Highlights

  • Schedule 40 PVC handles 140 °F continuous service
  • FNPT x spigot connects threaded and solvent-weld lines
  • ASTM D1784 cell class 12454 material rating
  • White finish matches standard DWV piping
  • Cleanout adapter allows easy drain access

Specifications

TypeDrain Components
ColorWhite
BrandMueller Industries
Model1WKF9

Questions about this item

Will the 1-1/2 inch FNPT x Spigot adapter thread onto my existing Schedule 40 PVC drain line?

Yes, the Schedule 40 fitting matches standard PVC drain pipe dimensions for a secure solvent-weld connection.

How can I verify the cleanout adapter is seated correctly after installation?

Check that the spigot end is fully inserted into the hub and the FNPT threads engage cleanly without cross-threading.

Does the box include a cleanout plug or thread sealant for the FNPT connection?

The adapter is sold as a single fitting; a compatible plug and PTFE tape or pipe dope must be purchased separately.

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