Model Number DPCT02 Color Blue Nominal Flow Rates gph 0.5 lph 2.0 DPCT04 Black DPCT08 Red 1.0 2.1 4.0 8.0 Recommended Pressure Range (P) psi 8 to 60 psi bar 0.6 to 4.1 Bar Emitter Specs Emitter Exponent (x) 0.000 0.000 0.