The wort grant is also called a buffer tank. It is necessary to add a wort grant to the brewhouse system for a big capacity beer system.
In general, during the lautering process, the wort is transferred into the kettle tun using a pump. Therefore, for a big capacity beer system, sometimes it can compact the false bottom of the lauter tun and cause a stuck runoff. Apart from being a major inconvenience, the stuck runoff can also damage the wort pump because magnetically coupled pumps can be damaged if they run dry. On the contrary, by adding a wort grant, the wort in the mash/lauter tun will flow into the wort grant naturally due to gravity during the lautering process. This ensures smooth lautering and avoids the aforementioned problems.
Wort Collection Ring
For a big capacity beer system, it is necessary to add a wort collection ring to the mash/lauter tun.
The wort collection ring is equipped below the mash/lauter tun, providing four wort outlets at the bottom of the mash/lauter tun. Without a wort collection ring, there is only one wort outlet. Consequently, the lone wort outlet bears the entire pressure from the spent grain, leading to the partial collapse of the spent grain. Collapsed spent grain pollutes the wort and affects the lautering result in some way. However, with four wort outlets sharing the pressure of the whole spent grain, the collapse problem can be avoided.