I know...I now consider that to be a design flaw and one of the reasons people sometimes don't have success with IFCSs. I was "satisfied" with my IFCS for 25 years without using that capability, but many aren't.Many infloor users don't have the option to route the return flow thru separate returns.
I went through the eye-balling process with my experiments, Dodger knows about that. It didn’t work. The gpm numbers from the FlowVis are "less accurate" at low volumes, but I believe are close to actual...and useful, especially for "comparisons" (~10gpm vs ~30gpm). But those very low gpm numbers (<10gpm] ARE impacted somewhat by the FlowVis itself (which is a check valve, too). So, the large differences between returns via “popups-vs-wall returns” (gpm & EF) may be a "bit" magnified.Granted, eye balling it is probably not that accurate. I guess one could set up some type of high resolution measuring device on the suction size to measure the quantity of water. I don't think a flow-meter would offer precise enough accuracy.
Yeah, I agree. And I get it...this stuff is more trouble than it is worth for most people...in the pool or in the house is where I am at these days, too! Although I did dig around to install my acid injection tank...that was before the real heat hit, haha.As for @Poolmama! - hopefully she will start her own thread so we can discuss her questions there and not bury info pertinent to her concerns in this post.