Netafim 708182 Bubbler Octa-bubbler is a pressure Compensating Device with a 1/2 inch FPT inlet and 8 swivel Port 3/16 inch outlets Constructed using ABS plastic. Built in back flow prevention engineered for added protection. Octa-bubblers deliver water to multiple locations Optional Port plugs are available for unused ports. Each octa-bubbler has a 150 mesh filter screen for clog resistance Interchangeable color coded flow control gives you the ability to change your GPH without changing the bubbler Available flow rates are 2 GPH, 6 GPH and 10 GPH, 20 GPH using a flow control Device. Pressure compensation range is 20 - 60 psi