How much wort am I losing to 30’ of 1/2" ID tubing?
~182322 cubic millimeters worth ;D
which is about 182 ml
If my math is right which I am not 100% sure about.
Well, 30’ of 1/2" tubing is a volume of about 70 cubic inches which would be about 1.22 quarts
see I told you my math wasn’t right.
His is ;D
I calculate (1/2" x 1/2" x PI)/4 x (30’ x 12"/1’) which gives a volume of 70.7 cubic inches which i about 1.22 quarts, or 1147 ccs.
That’s what you get for trying to go metric 
yup, dropped a decimal place somewhere along the way.
That is more like what I calculated. 70.7 cubic inches is also around 2 imperial pints ;D
thanks guys!
Volume of a cylinder = Pir^2h = Pi*.25^2*360 = 70.7 in^3 = 1.2 quarts yep
Can’t you drain the hose into a sanitized beer pitcher then dump into the fermenter? Hate to waste 2 plus pints of potentially good beer!
Bruce
not with my system - and most of that ‘hose’ is 2 CFCs back to back. not to worry, I brew 12gal to make up all the losses…
Google conversions are really helpful:
(pi * (0.25 inches) ^2) * (30*12 inches) in quarts
Also, your pump should keep prime until the head is empty, so you’ll only have losses in tubing after the pump. Or you could get a peristaltic pump and have no losses 
I have two plate chillers back to back and was considering forcing out the last of the wort with oxygen. The same oxygen I use with an inline stone mounted in a tri-clamp, but then connected to the hose that came from the kettle to force all possible wort out of the system. At least it would be sanitary as opposed to using compressed air. I’ll try it this weekend.
I’m also brewing extra to compensate, and it’s about 1/4 gallon lost in my case.
You can just push it out with water, as long as you’re using clear tubing or a sight glass.
I thought it would be in a siphon state going through either the CFC or the plate chiller, no? I was thinking of going to a plate chiller with immersion chiller in the fermenter to get the final temperature drop, but I hate to have to calculate that kind of loss - how much wort does the Blichmann plate chiller lose?
The site doesn’t have the plate dimensions, but the overall is 90 cu in = 0.38 gal. So probably <0.1 gal for the working fluid.
I’ve been chasing with compressed air for years. I know it should be unsanitary, but I haven’t tasted the effects of infection (yet!). I should use a better method.
might be worth it for someone to weight it dry and then post brew session (but before flushing) in order to get a feel for it?
I’m sure if you emailed John he’d give you the internal dimensions.