One other thing on the manifold, if you buy or make one that has one more outlet than the number of diffusers that you will be using, you can use this "extra" outlet for various things.
For example, if you want to see what pressure the pump is putting out (about a half psi for each foot of water depth), you could put a 15 psi gauge on it. Or if you want to "flex" your membranes on the diffusers to clean them, just open the extra valve and purge the air out then close it to let air build back up. Or in winter, if you want to put in a shallow diffuser to keep the ice open without moving your original diffusers, just put a temporary line out in shallow water with another diffuser and you already have the outlet there without taking hoses off your other diffusers.
Just an idea. If you are going to have two diffusers, get a manifold with three outlets. Then just leave the third outlet closed in normal operation.
Last edited by snrub; 08/28/14 12:09 PM.
