Missing Vent Pipe Plumbing and Drainage 101

Richland Gardens, Block 6, Kowloon Bay, Hong Kong COVID19 cluster

Realise, in high rise buildings suction pressure inside the drainage stack will continuously pull the traps (that means suck the water of the U traps leaving an empty and open U trap) if no vent pipe is provided, and creating COVID19 path into your home. The vent pipe is designed to prevent suction pressure (negative pressure) inside the drainage stack.

Filling each U trap once a week is not going to help if the stack in your building does not have a vent pipe (sometimes called balanced pipe) to relieve the pressure and prevent suction pulling the traps.

You don’t know what you don’t know, so go ask somebody who does :)

#drainage #design #Utrap #hongkong #drytrap