Quote Originally Posted by [Koolance] Dean View Post
I understand... but its like putting 1" exhaust on a 5.0. We can do it and we may, but it kind of confuses me personally.
By offering them with the compression fittings attached alread aren't you doing the same thing? Don't the compression fitting get narrower than 1/2" ID themselves?

Also, it's not the smallest diameter that defines flow rate by temselves, but for how long water has to flow through small diameters which defines how much pressure drop there is.
So even if the fitting has a lower diameter than the QD, the larger ID on the QD will still help flow, especially since the QD does have more restriction than a comparable piece of tubing with the same diameter (due to the QD having a shutoff mechanism which hinders flow). So even though the ID of the VL4 is 1/2" it's still not the same as havin a comparable piece of tubing in there, it will cause about the same pressure drop as putting a piece of 3/8"-7/16" tubing inside a loop that otherwise uses 1/2" tubing. So the ID of the QD would have to be even larger than the tubing for it to not cause a pressure drop (compared to a piece of tubing ofequal length).

PS: I like the VL3s very much and if you decide to make VL4s with female G1/4 threading you can be sure that I'm gonna buy them, and I bet a lot of other people will too. In fact, I'm pretty sure that those will sell better than any other of your quick disconnects. People have always been complaining that there are no good QDs with female G1/4 threading, and if the best QDs (pressure drop wise) out there would be available with G1/4 threading no one would buy NS6 CPCs anymore.