I have an approximately 25’ CFC that is homemade and I’m seeing approximately 2.-2.5 quarts of loss. Some of this is in my pump and tubing, but it all seems very high. Those using a pump and CFC, what losses do you see from post-boil into fermenter?
Use the pump but then let it drain via gravity ...
The coils need to be horizontal.
OR
Push with water. Need to rinse it out anyway, right? Follow the wort with boiling water. Feel the hose (or better, metal) going into the fermenter. As soon as it starts getting hot (too hot to handle or shortly before), stop pushing into fermenter (move hose or shut valve and then move hose to however you drain it). Shortly thereafter wort turns to water. Kills two birds with one stone. You'll need to rinse a bit more anyway, but it's getting it started for you.