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White PVC cleanout adapter with plug, FNPT x spigot fitting

Mueller Industries, Inc.

Mueller Industries, Inc. 1WKR6 PVC Cleanout Adapter Trap

SKU CH-DJNR-1PTRH MPN 1WKR6

A PVC cleanout adapter with plug connects FNPT to a 1-1/2 inch spigot for drain access

  • Product typeDrain Components
  • Product colorWhite
  • White PVC construction resists corrosion
  • Schedule 40 rating ensures durable wall thickness
  • FNPT x Spigot connection fits 1-1/2 inch pipe
  • Meets ASTM D1784 cell class 12454 standard
  • Rated to 140 degrees F for hot water drainage

PVC Cleanout Adapter 1-1/2 in

The Mueller Industries 1WKR6 is a white Schedule 40 PVC cleanout adapter with plug designed for 1-1/2 inch pipe connections. It uses an FNPT by spigot fitting arrangement for drain, waste and vent systems. The adapter meets ASTM D1784 cell class 12454 material standards and is rated to a maximum temperature of 140 degrees Fahrenheit.

FNPT by Spigot Connection Type

The connection style is the single specification that determines compatibility with existing piping. This adapter provides a female National Pipe Thread inlet on one end and a plain spigot on the other for solvent welding into a fitting hub. It is not rated for pressure applications.

Suits DWV Repairs Not Pressurised Lines

This part suits plumbers and DIYers completing drain, waste and vent cleanout installations where a removable access plug is required. Builders needing a pressure-rated fitting for water supply or compressed air lines should look elsewhere. The schedule 40 PVC construction also makes it unsuitable for high-temperature industrial discharge above the rated limit.

How it compares

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

Price $1.99
Cheaper than about 98% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameMueller Industries
Model name1WKR6
Product typeDrain Components
Product colorWhite

Questions about this item

What does the 140 °F temperature limit mean when the adapter is installed in a drain line?

The PVC material is rated for continuous service up to 140 °F, so it handles typical residential hot-water discharge without softening.

How does the FNPT x Spigot connection work and what does it seal against?

The female NPT threads accept a standard male pipe thread plug, while the spigot end slips into a 1-1/2 in Schedule 40 PVC socket for solvent welding.

What pipe size and schedule must the existing line be for this adapter to fit?

It is made for 1-1/2 in Schedule 40 PVC pipe, matching the spigot dimension and the solvent-weld socket depth.

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