The H10314 extension type curb box had an arch pattern base for 1/2" through 2" curb valves. The arched base rests on top of the valve and extends down around the valves to help exclude dirt and debris. Box is cast iron and is furnished with a cast iron, 1-piece, lid and brass pentagon plug. The upper part of the box is spring loaded and telescopes nto the base to allow for grade adjustment withing the range given. Stationery Rods are sold separately.
The H10342 provides a convenient way of setting a box in cement. It prevent cement from adhering to the lid, a condition where it could be difficult if not impossible to remove the lid. To install, the lid is first removed, the sleeve is slipped over the upper section, and the lid is then replaced. The sliding upper section is raised or lowered, along with the sleeve to the level of the cement as it is poured.