Comparison : Item # 1137, 1/2 Inch (in) Pipe Size, 900 Nominal Pressure Class, and 3D Size T-Pattern Check Valve
Item # 1138, 3/4 Inch (in) Pipe Size, 900 Nominal Pressure Class, and 5E Size T-Pattern Check Valve
Item # 1139, 1 Inch (in) Pipe Size, 900 Nominal Pressure Class, and 5F Size T-Pattern Check Valve
Item # 1140, 1 1/4 Inch (in) Pipe Size, 900 Nominal Pressure Class, and 7G Size T-Pattern Check Valve
Item # 1141, 1 1/2 Inch (in) Pipe Size, 900 Nominal Pressure Class, and 7H Size T-Pattern Check Valve