Hi Chandrasekaran. It is ...

Published March 15, 2016 19:32 by Erik Thorbjorn Norremark, Sanitation Specialist at SNV

Hi Chandrasekaran.

It is not a 'siphon', but a break pressure 'anti-siphon'. Actually just a T-piece at top of inlet pipe (at top of vessel) with an additional piece of pipe sticking up in the air (about 100 cm depending on water pressure). The 'vent' pipe will sometimes gulp a bit of water out but mostly it will be sucking air into the vessel, thus creating the violent mixing when bobbles are floating from bottom of tank to surface.

Sorry for the misguidance.

Erik