McAlpine double pipe siphon 1.5" HC7HC12R-POL1 – plumbing waste trap for two outlets

McAlpine double pipe siphon HC7HC12R-POL1 is a compact plumbing waste trap with a 1.5" connection designed to provide a reliable water seal for two outlets. Intended for under-sink installations in kitchens, bathrooms or utility rooms, this double siphon allows two fixtures to share a single outlet pipe while preventing sewer gases from entering the room. The unit is compatible with standard 1.5" fittings and is intended for straightforward integration into residential drainage systems.

Advantages

The double pipe design enables connection of two waste lines to a single outlet without compromising the water seal. Its compact form factor saves space under the sink and facilitates installation in cabinets with limited clearance. Constructed for everyday domestic use, the siphon provides consistent trapping performance and is compatible with standard 1.5" plumbing connections.

Suitable for

• Two-basin kitchen sinks where both drains share one outlet
• Bathroom installations with combined basin and bidet or basin and washing machine drain
• Utility rooms where space-saving dual drainage is needed

Key specifications

• Connection size: 1.5" compatible fittings
• Configuration: double outlet (two inlet pipes into one outlet)
• Application: under-sink waste trap for domestic drainage
• Form factor: compact design for limited space installations
• Function: provides water seal to prevent drain odors

How to use

Install the siphon beneath the fixtures so each inlet connects securely to the fixture tailpieces and the outlet aligns with the building drain. Ensure all connections are tightened according to the fittings used and check alignment so the unit sits level to maintain the trap seal. After installation, run water through each fixture and inspect joints for leaks; tighten or reseal as required. Follow local plumbing regulations and, if necessary, consult a professional plumber for compliance with building codes.

Usage recommendations

Use appropriate seals or jointing compounds compatible with 1.5" plastic or metal fittings. Periodically check for debris accumulation and clear if water flow slows; maintain the trap to ensure continuous odor prevention.