Using these flag emitters for a "zero-pressure" gravity drip system
These emitters are working very well for our garden irrigation, which is set up with a water storage tank on the ground. The top of the water level is sometimes very low, maybe only a foot above the ground when the tank is nearing the lowest points. These drippers are working fine, even the 1 gpm ones. We've also switched out some of our variable drippers for these types on our pressurized system, and this has improved the pressure balance overall. I"m very happy with these and ordered more for our larger garden.