Siphon for Washing Machine McAlpine 5505 — 6/4" x 40mm Drain Connection

McAlpine 5505 is a washing machine siphon with a 6/4" x 40mm drain connection designed to connect appliance waste water to household drainage. The compact unit combines a trap and a connection point for washing machine discharge hoses, ensuring reliable water flow from the appliance to the drain while preventing sewer gas from entering the home. The siphon is intended for domestic installations where a 6/4" x 40mm interface is required and fits standard washing machine discharge hoses.

Advantages

The siphon provides a single-piece solution that integrates a trap and hose connection, reducing the number of joints and potential leak points. Its 6/4" x 40mm drain connection is compatible with common household drain fittings and simplifies installation under sinks or in utility rooms. The design helps maintain a water seal to block sewer odors and supports stable drainage performance for frequent appliance cycles.

Suitable for

• Connecting washing machine discharge hose to household drainage
• Domestic laundry rooms and utility areas
• Installations requiring a 6/4" x 40mm drain interface
• Retrofit projects replacing older or worn siphons

Key specifications

• Connection size: 6/4" x 40mm drain interface compatible with standard washing machine hoses
• Function: Integrated trap and hose connection for appliance wastewater
• Application: Indoor domestic drainage for washing machines
• Form factor: Compact under-sink/utility room installation

How to use

Position the siphon so the drain connection aligns with the household waste outlet and attach the washing machine discharge hose to the designated inlet. Ensure all push-fit or screw connections are tightened according to the installation type and that the siphon is installed at an appropriate height and slope for gravity drainage. After installation, run a short wash cycle and inspect all joints for leaks; verify that the trap holds water to prevent sewer gas from passing into the room.

Usage recommendations

Periodically check the siphon and hose connections for signs of wear, blockages or leaks. Clean the trap if slow drainage is observed and replace the unit if cracks or persistent leaks occur. Follow local plumbing codes and use appropriate seals or clips for hose connections to ensure a safe, watertight installation.