Tundish
According to Approved Document G (Sanitation, hot water safety and water efficiency), 2015 edition, a tundish is: '…a device, installed in the discharge pipe from a valve, that provides an air break allowing discharge to be conducted safely to a place of termination. The tundish also provides a visible indication of a discharge and functions as a backflow prevention device.'
The Illustrated Guide to Hot and Cold Water Services (BG 33/2014), written by Reginald Brown and published by BSRIA in 2014, defines a tundish as: ‘A purpose designed fitting that allows overflowing water to be visually observed.’
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