Hotun Hiflo SF Speedfit 15mm x 32mm Dry Trap Tundish - White From the manufacturers that brought you the hotun and the hotun hiflo, they have now introduced the hotun hiflo SF. The hotun hiflo SF features a John Guest inlet connection which simplifies installation and allows for easier compliance with building and water regulations. As with the previous dry trap tundish from RA Tech, the hotun hiflo SF allows the T&P & Pressure relief valve to connect directly to the internal waste or soil pipe eliminating the need for external discharge. The non-return valve within the hotun hiflo dry trap Tundish stops any foul odours from entering up through the Tundish and back into the building. The hotun dry trap tundish allows for easy identification of the historical PRV discharge by touch without the need to dismantle the connection. The hotun SF has been approved for use by several big-name boiler and water heater manufacturers and with its 5 year guarantee it is the perfect solution to any