DIG's most advanced dripper. Our PC drippers allow longer runs with equal flow from each dripper at any pressure between 10 and 55 PSI. They are self-cleaning, utilizing a silicone diaphragm which presses against the water passage as pressure and flow fluctuate to provide preset flow rates; when the pressure is below 10 PSI, the diaphragm is completely open, allowing particles to be washed through. PC drippers are very durable and can withstand harsh conditions.