CP Design Center

Underground Anode Installation Instructions

Galvanic anodes are installed on underground pipelines to provide localized cathodic protection for that segment of line. The amount of protection derived from an anode is dependent upon several variables including coating quality, line size, and soil resistivity.

Underground anodes are generally installed in a packaged form, with the anode surrounded by a prepared backfill. The installation process is generally the same for all anode sizes. A preferred method of installation is with the anode connected to the pipe through a test station. This configuration permits monitoring of anode performance. The other method of installation is to directly connect the anode wire to the pipe.

Anodes may be installed either horizontally or vertically. A minimum separation distance of 5' is desirable to maximize the performance of the anode. This separation can be achieved either horizontally or vertically depending on local conditions. In most cases, anodes should be installed no shallower than pipe depth. In dry soils, additional depth may enhance anode performance by reaching lower resistivity soil. Wetting the anode with approximately five gallons of water after installation will activate the anode faster and provide initial current output data.



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