Siphon McAlpine HC4PF-32SPS 5/4" (32 mm) straight pipe trap with extension, white

McAlpine HC4PF-32SPS is a 5/4" (DN32) straight pipe siphon in white, intended for use with domestic basins and pedestal wastes. The siphon features a straight-line design with an extension to provide additional length where required. It creates a water seal to prevent the escape of sewer gases and includes a removable section to allow access for cleaning and maintenance. The product is finished in white to match common sanitary fittings and is sized for standard 32 mm waste connections.

Advantages

The straight pipe design offers a compact profile that fits in restricted spaces behind basins and pedestals. The added extension gives flexibility for installations that need extra length without altering the trap geometry. The removable section simplifies routine cleaning and maintenance, reducing the risk of blockages. The white finish provides a discreet appearance under fixtures and is compatible with most domestic bathroom décors.

Suitable for

• Domestic basin waste connections with 32 mm (DN32) outlets
• Pedestal basins where a straight trap profile is required
• Installations needing extra trap length without changing pipe alignment
• Situations where a removable section for cleaning is preferable

Key specifications

• Type: straight pipe siphon with extension
• Connection size: 32 mm (DN32) compatible
• Material/finish: white sanitary plastic finish
• Removable section: included for cleaning access
• Application: basin and pedestal waste installations

How to use

Fit the McAlpine HC4PF-32SPS between the basin or pedestal waste outlet and the soil discharge pipe following standard plumbing practice. Ensure all compression joints are tightened to the manufacturer’s recommended engagement to avoid leaks. Position the extension to achieve the required length and alignment, then check that the trap retains water to form an effective seal against sewer gases. Access the removable section when cleaning is required to clear debris and then refit securely.

Usage recommendations

Verify compatibility with existing 32 mm waste fittings before installation and ensure the siphon is installed with an adequate water seal. Use standard bathroom-safe cleaners and avoid pouring aggressive chemicals that may damage plastic components. Periodically inspect the removable section and clean when flow is reduced to maintain proper drainage and odour control.