TOPP’s valve vault, for basin guide rail systems for pump stations, lift stations and other applications, is constructed of durable, non-corrosive polyethylene. Offers lightweight construction for easy installation and reduced freight costs. Extremely cost competitive compared to fiberglass or concrete valve vaults. “Frog-mouth” or solid composite fiberglass or aluminum covers available. Also available with or without discharge piping and valves. Optional 18”extension available for applications requiring a discharge depth of 36” down to centerline.