Legend Valve 450-491 4" Copper Cap bathware

4-Inch Copper Cap for Pipe Fittings

This copper cap fits 4-inch inside diameter and 4-1/8-inch outside diameter pipe ends. It is intended for plumbing installations that require a secure closure on copper piping systems. The component suits professional installers and homeowners completing repairs or new supply lines. The product is supplied new from the manufacturer.

Simple Solder Installation with Flux

The cap is installed by cleaning the pipe end and the fitting interior, applying flux, then sweating the joint with a torch. Overheating can damage the copper or cause solder to run unevenly, so consistent heat control is important. Insufficient cleaning or flux coverage often leads to pinhole leaks that appear only under pressure. Proper deburring prevents turbulence and premature wear at the joint.

Verify Pipe Dimensions and Local Codes

Confirm that the existing pipe has a 4-inch inside diameter and 4-1/8-inch outside diameter before ordering. Check local plumbing codes for approved materials and any restrictions on copper fittings in potable water systems. The product carries a California Proposition 65 warning for chemicals known to cause cancer and birth defects or reproductive harm. Ensure compatibility with the intended application and regulatory requirements.