A contemporary reliable piston-driven diaphragm makes the PROSERIES 100 Valve the perfect choice for dirty water applications. PROSERIES 100 Valves are designed to provide superior flow rates with minimal pressure loss due to the unique straight through flow path. It has both an internal bleed and external bleed in addition to flow control. It can be piped with 1" pipe in the inside of the inlet or 1-1/4" coupling over the outside of the inlet.