BeanMachine
Active member
If you want the least amount of head loss, I would run 1.25" all the way to the sea swirls.
I know someone that used the same return pump as me, but used 1" flex tubing..the flow was just ok. I ran my return plumbing 1.25" all the way to the tank, my flow has to be twice as much. I was surprised 1/4" made that big of a difference. Also I'm sure flex tubing didn't help.
Thanks Nick. I've been talking to Scott at Royal Exclusive and he is also suggesting I go 1.25" all the way then reduce at each SS. I guess it would be even more efficient if I up sized the pipe even more but I don't want to go any larger.
Here is the current return drawing using a RD3 150, which they agreed would work. Now I'm contemplating running the 230 and adding in the manifold to the same pump as well.

