Siphon McAlpine HC14 6/4" x 40mm for Washing Machine and Dishwasher

The McAlpine HC14 siphon is designed for washing machines and dishwashers, providing reliable drainage with a 6/4" (1.5") appliance connection to a standard 40 mm waste outlet. Its compact construction allows installation under sinks or behind appliances where space is limited. The unit seals the discharge line to prevent wastewater backflow and odours, while its durable materials offer resistance to everyday domestic use and easy integration with standard 40 mm soil or waste pipework.

Advantages

The siphon combines a compact footprint with a straightforward inlet and outlet arrangement that simplifies connection to washing machines and dishwashers. It creates an effective water trap to block sewer gases and reduces the risk of blockages by offering a smooth internal flow path. The design supports quick installation and routine maintenance without special tools, and its materials are chosen for corrosion resistance and long-term performance in household drainage systems.

Suitable for

• Connecting washing machines to 40 mm household waste pipework
• Connecting dishwashers to standard 40 mm drainage systems
• Installation in tight spaces under kitchen sinks or behind appliances

Key specifications

• Appliance connection size: 6/4" (1.5")
• Outlet diameter: 40 mm for standard waste pipes
• Type: siphon with water trap to prevent odours and backflow
• Material: durable, corrosion-resistant plastic suitable for domestic wastewater
• Compact dimensions for space-constrained installations

How to use

Position the siphon so the 40 mm outlet aligns with the household waste pipe and attach the 6/4" appliance hose to the inlet, ensuring a secure fit. Use suitable pipe connectors or clamps to seal both the appliance hose and the 40 mm connection according to local plumbing practice. Verify the unit is level enough to maintain a consistent water seal and run the appliance through a short cycle to check for leaks and correct drainage.

Usage recommendations

For reliable performance, flush the drain periodically with hot water to clear residue from detergents and avoid grease buildup. Inspect connections after first use and during routine maintenance; tighten or replace clamps if any seepage appears. If access is limited, allow sufficient clearance for occasional inspection and cleaning.