There are actually 10 output nozzles, each end has one, one of them doesn't really show up in the pictures. As far as output for each nozzle, you need to design the system based upon how much flow you want, and what type of pump you use. I'm using the Barracuda pump, which puts out 4500 gph
. But it's a non-pressure rated pump, meaning that it's good a pushing a lot of water, if there isn't a lot of restriction. That's why I used large 1.5" PVC
thoughout the return, it doesn't restrict the flow much at all. With the ten 3/4" nozzles, I'm probably getting a total of 3800 - 4000 gph
. If you use a pressure rated pump you could probably get away with a smaller diameter pipe (but I'm not an expert, remember!
). The fact that the manifold is totally closed keeps the pressure fairly even throughout the whole thing. With a manifold, you don't get a couple of very strong linear water streams, but more of an even strength flow throughout the whole tank, which from what I've read is the best way to set up the flow. And with the nozzles from the front colliding with the nozzles from the back, the flow is quite random, also.