Plumbing advice

[jeflogan]

Looking for some help on my plumbing design that ensures even flow on my return lines. Would one of these be a better option or is there a better way. Pool is full and need to finish the plumbing. Thanks

 

[sktn77a]

I would guess the first one would even out returns 1 and 3.

 

[Richard320]

You can balance the flow by closing the valves a little. The three pipes are same size, so each one can only get 1/3 anyway.

So far as maximising flow, it looks like #2 would be best. Look at the very last return to the right. In version 1, the water has to make 4 90s to get from SWG to pool. In #2, only 2 bends.