Each 90 slows the flow. The key is to drain through as straight a pipe as possible. You might need to set up a manifold to allow each drain the same length from the tank. Then run a single line to the sump, say 2".
Why aren't you using flex tubing? $$$? I think you would like it better in the long run...easier to work with.
flexpvc.com
^^check it out for manifolds...you will see what I'm talking about.
Why aren't you using flex tubing? $$$? I think you would like it better in the long run...easier to work with.
flexpvc.com
^^check it out for manifolds...you will see what I'm talking about.