Sink Trap McAlpine HC7HC17DR 1½"×50mm tubular with washing machine/dishwasher connection and overflow

McAlpine HC7HC17DR is a tubular 1½"×50mm sink trap engineered for domestic and light commercial kitchen and utility-room drainage. It features a standard 1½" sink outlet connection, an integrated inlet for washing machine or dishwasher hose connection, and an overflow/spill connection. The trap uses a water seal to prevent sewer gases entering the room while allowing reliable waste discharge and easy integration into existing drainage layouts.

Advantages

The tubular design delivers a compact footprint that simplifies installation in confined cabinet spaces and under sinks. The integrated washing machine/dishwasher inlet removes the need for additional connectors and reduces the risk of leaks at junctions. The overflow/spill connection provides a safe route for excess water, and the water-seal construction offers consistent odor prevention without moving parts. Materials and dimensions conform to common domestic plumbing standards for compatibility with standard 1½" outlets.

Suitable for

• Kitchen sink installations with standard 1½" outlets
• Utility rooms where a washing machine or dishwasher drain needs connection
• Light commercial kitchens and small food-preparation areas
• Retrofitting or replacing existing tubular sink traps

Key specifications

• Trap type: tubular 1½"×50mm
• Connection: standard 1½" sink outlet
• Auxiliary inlet: dedicated washing machine/dishwasher hose connection
• Overflow: integrated overflow/spill connection
• Function: water-seal odor prevention with direct waste discharge
• Application: domestic and light commercial drainage

How to use

Install the trap by connecting the main tubular body to the sink outlet using the appropriate compression or push-fit fitting for a 1½" connection. Attach the washing machine or dishwasher discharge hose to the dedicated inlet and secure it according to appliance manufacturer instructions to prevent siphoning. Connect the overflow/spill outlet to the appliance or overflow pipe as required by the installation. Ensure all joints are tightened and perform a water test to check for leaks and confirm the water seal is maintained.

Usage recommendations

Position the trap to maintain a continuous fall toward the drainage stack and avoid excessive horizontal runs that can impede flow. Periodically inspect hose connections and compression fittings for signs of wear or leaks, and clear any debris that may accumulate to preserve the water seal and prevent blockages.