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Brass threaded pipe plug with square drive head

OATEY

OATEY 42374 Brass Threaded Plug 4 in

SKU CH-CP2R-XHFJB MPN 42374

Brass threaded drain plug fits 4 in nominal pipe size and seals at 10 psi

  • TypeDrain Components
  • 4 in brass plug seals drain lines securely
  • Threaded design allows quick installation with standard tools
  • Brass construction resists corrosion in wet environments
  • Rated to 10 psi for reliable low-pressure sealing
  • Square drive style enables positive grip during tightening

Brass Threaded Plug 4 in

The Oatey 42374 is a brass threaded plug designed for 4-inch nominal pipe size applications. It provides a secure closure for drain lines and cleanout fittings in plumbing systems. The plug features a square drive style for installation and removal with standard tools. This new component is rated for a maximum operating pressure of 10 psi.

Upgrade from plastic or damaged plugs

This brass plug replaces worn, corroded, or cracked plastic and metal plugs in existing drain systems. The brass construction offers superior durability and resistance to deformation compared to plastic alternatives. The upgrade is worth it when the original plug strips during removal or fails to seal under test pressure. It serves as a direct replacement for standard 4-inch threaded cleanout openings.

Verify thread compatibility and pressure rating

Confirm the existing fitting uses standard iron pipe threads matching the 4-inch nominal size before ordering. Ensure the system operating pressure does not exceed the 10 psi maximum rating for this plug. Check that the square drive recess is accessible for the wrench size available on site. This item is restricted from sale in certain states; verify local code acceptance prior to purchase.

Highlights

  • 4 in brass plug seals drain lines securely
  • Threaded design allows quick installation with standard tools
  • Brass construction resists corrosion in wet environments
  • Rated to 10 psi for reliable low-pressure sealing
  • Square drive style enables positive grip during tightening

Specifications

TypeDrain Components
BrandOatey
Model42374

Questions about this item

What pipe size does the 4 in nominal threaded plug fit?

The plug matches a 4 in nominal pipe size with a 4 in outside diameter and brass NPT threads.

Which tool engages the square drive on the plug during installation?

A standard square-drive wrench or ratchet inserts into the recessed square to tighten or remove the plug.

How often should the brass plug be inspected or replaced under normal service?

Inspect annually for thread corrosion or leakage; replace if the square drive rounds out or the plug no longer seals at 10 psi.

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