American Flow Control Trench Adapter And RetroFit Box Insert

American Flow Control’s Trench Adapter is a fully adjustable valve box and extension stem system that is available in trench depths ranging from 3 feet to 20 feet. Both the valve box and the extension stem adjust to grade in a matter of seconds, completely eliminating the need to cut extension stems in the field. The valve box and extension stem can simultaneously be adjusted and locked in place, leaving the operating nut at grade level. This adjustment is accomplished by the use of a coupling gland, which includes a split O-ring that, when hand tightened, locks the Trench Adapter to the desired trench depth.

The Trench Adapter helps eliminate the traditional problems of trying to locate and engage the operating nut on the valve. With conventional valve boxes, the valve operating nut is several feet below grade, making it difficult to locate and to align the T-handle wrench on the operating nut.

This is especially difficult if the box is not centered over the valve and is filled with debris, mud and/or water. The Trench Adapter helps assure that the valve can be operated at ground level. Simply remove the lid, and the operating nut is accessible and ready to use.