Return pump

[Brew12]

Non-whoops...nevermind...read on....

90's don't seem to have much effect at typical 2x-4x flow rates and typical PVC diameters....at least from playing around with the calculator I posted.

Higher flows and smaller plumbing both definitely seem to magnify their effect though.

So you think the effect of a second branch is also similarly minimal (not zero though) under typical flow rates?

(Making sure I read you right...tell me if I'm wrong.)

Nope, you are exactly right. The flow is just too low in cases like this for the restrictions to matter much.