Hotun Dry Trap Tundish 15/32mm Hiflo Black SF Range – Model HHBSF15-32

The Hotun Dry Trap Tundish 15/32mm Hiflo Black (SF Range, Model HHBSF15-32) is a high-performance tundish designed for large unvented hot water heaters and boilers. With its advanced dry trap design, it allows safe discharge of hot water from temperature or pressure relief valves directly into internal waste or soil stacks, while preventing foul odours or gases from entering the building. This ensures a compliant, visible, and low-maintenance discharge solution for domestic and commercial installations.

Key Features

• Dual Connection: 15mm compression inlet x 32mm outlet compatible with push-fit or universal compression waste fittings.
• Odour Block: Patented dry trap eliminates the need for an external tundish or water seal, providing a permanent barrier to foul air return.
• High Flow Rate: Designed for flow rates up to 18 litres/minute, ideal for larger unvented hot water cylinders and boilers over 15 litres capacity.
• Compliant Discharge: Enables temperature/pressure relief valve (TPRV) discharge to internal pipework in accordance with UK regulations.
• No Need for External Discharge: Allows safe and compliant discharge without drilling external walls, expanding installation options for boilers and water heaters.
• WRAS Approved: Certified for use on potable water systems and built to meet UK plumbing codes and safety standards.
• 10 Year Warranty: Robust polymer construction backed by an industry-leading warranty for peace of mind.

Included Parts

• HHBSF15-32 tundish body (black)
• 15mm compression inlet fitting
• 32mm push-fit/universal compression outlet
• Installation instructions

Technical Specifications

This high flow, black finish Hotun Dry Trap Tundish is ideal for installation with any new or retrofit unvented water heater or boiler, delivering visible, odour-free and fully compliant waste discharge to suit modern plumbing standards and layouts.