depends on what you mean by "dripper" that typical drip system im thinking of has a flat disc at the end of the line to regulate the flow. If this is the case then you just need to get a slower one. They are rated in GPH
I just looked into it, those are suppose to come out in a stream not drip.
If you want to slow it down you can get a 1/2 in valve and install it inline right after the pump.
