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Standard Tundish


The Standard Tundish provides a clear viewing area to visibly see when an unvented system is discharging due to an error condition. The discharge pipe from expansion valves, temperature relief valves and combined temperature and pressure relief valves should pass through a tundish with an AUK3 air gap. The tundish must be located within the same room, as near as possible to the relief valve, since it is important that the discharge is clearly seen to warn of a possible problem within the system.


  • Safe & Visible means of Discharge
  • Various Sizes Available
  • Corrosion Resistant
  • AA Air Gap
  • Category 5 Back Pressure
  • Easy Installation
  • WRAS Approved

Technical Data:


Material: Acetal Co-polymer
Colour: Black
Sizes (Outlet x Inlet): 22mm x 15mm Compression
  28mm x 22mm Compression
Maximum Temperature: 95°C 
Air Gap Type: AA 
Back Pressure Prevention: Category 5
Back Siphonage Prevention: Category 5
Approval: WRAS Approved