"Drew Cutter" wrote in message
...
Some questions:
Why do you want add a manifold?
How much air?
Where is the air coming from?
I am assuming that the drum is vertical how deep is the liquid inside
the
drum?
Is the drum complete or has the top been cut off?


My best understanding is to shake up the beads and to clean off the
beads . I sure sameer can give you a better explanations.


For his bead filter project, the drum would have the top still. The airflow
needs to be strong enough to bring the water and beads to a "boil". Drums
come in 55 and 30 gal size, so about 4ft of water depth.

Sameer