Sink trap extension McAlpine HC13-32 5/4 x 5/4" for washbasin plumbing

McAlpine HC13-32 is a sink trap extension designed for washbasin plumbing with 5/4 x 5/4" threaded connections. It allows extension or adaptation of an existing washbasin trap to achieve correct alignment between the basin waste fitting and the drainage pipe. The extension is intended for use where small adjustments to length or connection geometry are required during installation, repair or replacement of washbasin traps in domestic and light commercial bathrooms.

Advantages

The extension provides a straightforward solution to bridge mismatched or recessed connections without altering existing pipework. Its standardized threaded ends ensure reliable mechanical connection with most compatible washbasin traps and waste fittings. Using an extension reduces the need for custom pipe cutting or additional fittings, simplifying installation and saving time on site.

Suitable for

• Extending the reach of a washbasin trap to meet the drain outlet
• Adapting incompatible or recessed waste fittings
• Repairing or replacing existing trap assemblies without full rework
• Domestic bathrooms and light commercial washrooms

Key specifications

• Connection size: 5/4 x 5/4" threaded connections for washbasin trap interfaces
• Function: extension/adaptation piece for sink trap alignment
• Application area: washbasin plumbing in bathrooms
• Material compatibility: intended to mate with standard plastic or metal trap fittings

How to use

Confirm that both the washbasin trap and the drain outlet use 5/4" threaded connections before installation. Unscrew the existing trap coupling if necessary, then thread the extension into the trap or waste fitting by hand until seated. Ensure threads are engaged straight and secure, and use appropriate sealant or thread tape if required by the installation practices in your region. After fitting the extension, reassemble the trap and check for correct alignment and adequate clearance. Tighten connections to a secure hand-tight level and test for leaks by running water through the basin.

Usage recommendations

Use this extension for minor length adjustments and alignment corrections; if significant pipe re-routing or different connection sizes are required, consider replacing the trap or using alternative fittings. Verify compatibility with surrounding materials and follow local plumbing codes when applying sealants or thread tape.