One thing Ive found about drippers is that if you are hooking them to a regular hose spigot it is very awkward to adjust the flow (especially if you are on a well and your pressure switch cuts on at 30 and off at 50). The hose spigot valves are just too coarse for the kind of adjustment required. What I do is take a few quarters and drill 1/32", 3/64", 1/16" etc holes straight thru them. They will fit snugly in the female hose adapter just under the hose washer. Basically, you need to kill off most of the house pressure and bring it down to the 10 to 15 psi range. For just a couple of 1 gph drippers, the 1/32" hole might be about right. For a bunch more drippers, a bigger hole is called for. Mostly its trial and error, and i just keep an assortment of different hole sizes handy.
I know most of them are supposed to be pressure compensated, but I see alot of variation in their individual flows if they have more than about 15 psi pressure on them.
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