Boiler Trap McAlpine HC7-FUN 3/2" x 50 mm, waste outlet for water heater

McAlpine HC7-FUN boiler trap is designed for connection to domestic water heaters and central heating condensing units. It provides a compact sealed outlet that prevents sewer gases entering the installation while allowing condensate and drain-off from electric and gas water heaters. The trap fits a 3/2" x 50 mm waste outlet and is suitable where a dedicated, low-profile condensate outlet is required for reliable, hygienic discharge.

Advantages

The trap offers a compact design that saves space around boiler plumbing and simplifies installation in tight cupboards or utility rooms. Its sealed construction prevents unpleasant odours and backflow of gases while maintaining a clear path for condensate and boiler discharge. The product is made for straightforward connection to standard 3/2" x 50 mm outlets and supports both electric and gas water heaters without additional adaptors in most common installations.

Suitable for

• Condensate drainage from domestic electric water heaters
• Drain-off connection for gas water heaters and combi boilers
• Tight installation spaces such as boiler cupboards and plant rooms
• Retrofit or replacement of existing compact boiler traps

Key specifications

• Connection size: 3/2" x 50 mm waste outlet
• Application: condensate and drain discharge for domestic water heaters
• Function: sealed trap to prevent odours and backflow
• Compatibility: suitable for both electric and gas water heaters
• Design: compact, low-profile unit for tight installation spaces

How to use

Install the trap directly to the water heater waste outlet sized 3/2" x 50 mm, ensuring a secure, watertight connection. Position the trap so the sealed section remains below the outlet to maintain the water seal and prevent odour ingress. Connect the discharge pipe to an appropriate drainage line following local plumbing codes; ensure correct gradient and support for the condensate pipe to avoid pooling. Check for leaks after filling the system and during first operation of the heater.

Usage recommendations

Inspect the trap periodically for blockages or sediment and clear any debris to maintain proper flow. When installing, follow manufacturer guidance for pipe routing and local regulations for condensate disposal. Replace the trap if seals show signs of wear or if persistent odour or leakage occurs.