Wort outlets TC with extended collection rings

For better smooth filtration of wort,we equip a flat bottom mash /lauter tun forlauter tun , that has a wort outlets TC with extended collection rings.
There are 4 wort collecting ports evenly distributed in the bottom.
It will be very helpful for wort outlet.

The outer ring is for wort collection, the inner ring is for clean water rinses for false bottome.
There is a back pressure flushing device under false bottom with nozzles(inner ring),
These nozzles can be used for washing the gap between false bottom and the bottom of tank.
It can be also used for rinsing the mash when we meet some stuck problem and we can use it to release the negative pressure.