Abstract: Housing assembly fabricated of a lightweight non-metallic material for housing a plurality of telephone line repeaters. The housing assembly includes a circular base with a perpherial thread, a generally bell-shaped cover, and a threaded retaining ring for securing the cover to the base. The repeaters are mounted in modular chassis in the housing, and the chassis can be stacked to accommodate a desired number of repeaters. Cable assemblies to be connected to the repeaters are removably secured to the base outside the housing, and the cables pass into the housing through sealed openings in the base. Valve means is provided for pressurizing and depressurizing the housing if desired.