New Ludlow-Rensselaer valves, exclusive to Patterson Pump, feature the Ludlow-pioneered double wedging design of locking gates, which operate easier under pressure and with less wear. Three designs are available: Round bottom valves, Square bottom valves and Slimline valves. The valves are offered in sizes ranging from 14" to 84" in diameter, with pressure ratings from 50psi to 375psi. All are manufactured to meet or exceed requirements of the latest AWWA C500 specifications.