Sure! It was Matt Wandell's idea. Basically, you fit a venturi valve into the water line that goes through your fridge. The venturi valve has a nipple on it, which is used in skimmers to suck in air and make bubbles. It works by way of changes in water pressure as the water passes through the valve. In our case, we use it to create a very light suction. We connect our food dosing pump output into this nipple on the venturi, and this light suction creates a slightly negative pressure in the dosing pump tubing. This way, if the pump tubing ruptures you don't drain your tank. Instead, the venturi sucks in air. Also, since there is always a little negative pressure on the pump tubing, you're less likely to have leaks at your 1/4" fittings due to excessive backpressure. I'm running a 1500 gph pump to push water through all this so that's pretty important for me. Hope that makes sense! Aquabacs posted a pic of his setup in the continuous feeding sticky, that should help make it more clear too. I'll take pics of mine later but it's nowhere near as tidy as my setup is a little different. If you check out my vid on the previous page you can see how the venturi keeps water from shooting up into the pump tubing though.