One-piece construction-combines a low-flow drip valve, filter, 30 psi pressure regulator and 1/2-inch drip tubing adapter. * Fits all 1/4-inch male thread micro-spray heads * Filtration-removable 200 mesh filter with flush port * Manual bleed lever - for flushing and testing * Includes 1/2-inch drip tubing adapter - works with 690 to 710 diameter drip tubing