I recently set up a drip system(click the link for details) and I tried to use my water meter to measure the flow but the leak indicator wasn't even moving. I had to turn on one of the faucets also to get it moving so I looked up the specs on my water meter and to my surprise it can not pick up flow below 3/4 a gallon a minute! You do the math, thats a ridiculous amount of water I can continuously drip into my setup w/o my water meter picking up a drop of it. Even at the flow pictured below over an extended period of time it registers none of it. Serendipity!
http://www.monsterfishkeepers.com/f...at-s-in-your-stand!-mechanical-photo-s/page29
http://www.monsterfishkeepers.com/f...at-s-in-your-stand!-mechanical-photo-s/page29