Irritrol 700B-.75 .75" 700 Series Valve with Flow Control. Featuring a straight-through flow path that dramatically reduces pressure loss, the Irritrol 700B-.75 .75" 700 Series Valve with Flow Control leads the industry in long-term performance and reliability. With a flow range from .1 to 180 GPM and a self-cleaning, 150-mesh stainless steel filter screen, these unique valves are ideal for a multitude of potable and dirty water applications. A glass-reinforced nylon body and bonnet, stainless steel spring and hardware, and a rugged, nylon-reinforced Buna-N diaphragm add an extra dimension of toughness to this very durable family of valves.