Pond Boss Forums AERATION Systems questions Presure volume?

The pressure should be related to the depth of the diffuser (pressure to overcome the head pressure of the water column) and not the flow rate.......UNLESS.......... there is an internal restriction built into the diffuser AND flow rates are sufficient for the restriction to cause a pressure rise.

The Matala's I use have no internal restriction but I have heard some others do. The internal restrictor could be to protect from over expanding the membrane by limiting excessive flow rates or as a mechanism to help divide flow between multiple diffusers.

So if you are operating within the design limitations of the diffuser, you should be looking at head pressure of the water or in other words about one half psi for each foot of water depth.