Skip to main content
    Pro Reference Trades Suite
    Sign InCreate accountAdminUpgrade
    Back to glossary

    Piping Materials · Pipe Sizing

    Type K Copper

    Copper tubing with the thickest walls, making it suitable for underground service and high-pressure applications. Outside diameter is always 1/8-inch larger than nominal size.

    Pro launch updates

    Get notified when Pro launches, plus a monthly code-change digest. Email only — no account required.