Hotun

Hotun is a UK‑designed and manufactured range of dry‑trap tundishes and in‑tundish alarm units to meet modern relief‑valve discharge requirements in heating and hot water systems.

About Hotun

These products are designed to solve common installation problems, offering a one‑product solution that combines a tundish and dry‑trap for safe, visible discharge from a sealed system’s relief device.

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Product Range & Key Solutions

The Hotun product includes:

  • Hotun 100 & SF dry‑trap tundishes – designed to give both compliance at installation and visibility at diagnosis, allowing safe discharge from a (T)PRV to internal waste or soil pipe without foul‑odour backflow.
  • Hotun hiflo range – larger‑flow variants for bigger unvented cylinders or system volumes, rated at higher flow rates and capable of higher performance.
  • Hotun detect – an in‑tundish alarm unit providing audible and visual alert if water starts to discharge via the tundish, thus helping catch faults early, save water and energy.
  • Accessories / shields – includes items such as the hotun protect ventilated shield and hotun shield to add safety from scalding discharge water while maintaining compliance.

Key Features & Benefits

  • Compliance & safety: Designed to fulfil the air‑break to drain requirement and provide back‑flow/back‑siphonage protection (Category 5 risk water) for internal discharges.
  • Visibility for diagnosis: Unique open‑sided design allows the installer or homeowner to see residual water in the tundish, making it easier to spot past or current discharges from relief devices.
  • Wide application range: Suitable for boilers, unvented cylinders, HIUs, condensate drip trays (MVHR/FCU) and overflows. Rated up to 120 °C for high‑temperature duty.
  • Installation‑friendly: Many models include push‑fit connections (SF range), compact form‑factor to fit tight spaces, and made in Britain manufacturing.
  • Award‑winning & credible: Recognised by industry bodies and widely accepted by major boiler and water‑heater manufacturers.