Trench Adapter and Retrofit Overview

Trench Adapter

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. You simply raise the upper pipe to the proper height and lock it into position. Now you have not
only adjusted the height of the valve box, but you have also raised the extension stem and operating nut to grade as well. 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 eliminates the 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 valve box is filled with debris, mud, and water. The Trench Adapter assures that the valve can be operated at ground level. Simply remove the lid and the operating nut is accessible and ready to use.

A grit washer supports the extension stem in the top section of the valve box. The grit washer is designed to keep dirt and grit from entering the valve box interior. The valve box locking lid is color coded and includes cast markings to indicate potable water, sewer, re-use water, or gas.

Retrofit Valve Box Insert

American Flow Control's Retrofit Valve Box Insert upgrades an already installed standard cast iron valve box with the features of the American Flow Control Trench Adapter. The Retrofit features a self-adjusting extension stem system that is available in trench depths ranging from 3 feet to 20 feet. This will eliminate forever the problem of trying to locate and engage the operating nut on the valve. With conventional valve boxes, the valve operating nut is at least several feet below grade, making it difficult to locate and align the T-handle wrench on the operating nut.

This is especially difficult if the valve box is filled with debris, mud, and water. The Retrofit Valve Box Insert assures that the valve can be operated at ground level. Simply remove the lid and the operating nut is accessible and ready to use.

The grit washer supports the extension stem in the top section of the valve box. The grit washer is designed to keep gravel and debris from entering the valve box interior. The valve box locking lid is color coded and includes cast markings to indicate potable water, sewer, re-use water, or gas.

To view details on Trench Adapter and Retrofit Valve Box Insert's construction, features, benefits, specifications, parts, as well as sectional drawings and dimensions please view the Trench Adapter and Retrofit Valve Box Insert Brochure PDF page.