Selecting the right valve box height starts with the depth of the trench, the size of the valve, and the valve box configuration. This guide walks through the measurements and calculations needed to choose the correct extension range.

• Step-by-step instructions for two-piece and three-piece assemblies
• Reference tables by valve size for Cast Iron, Bison, and CIP configurations
• Worksheets for calculating your required valve box height
• Extension range selection tables for every assembly type