An exterior outlet that water gets into, or a box that cracks when you tighten a conduit locknut — that's a callback waiting to happen. PVC weatherproof boxes are the standard for exterior electrical work in wet or damp locations, but the fit and thread quality vary widely. 2-gang PVC construction — room for two devices side by side, standard in most exterior combination installations. Threaded entries accept standard conduit without locknuts — cleaner install, better weatherproof seal. Weatherproof rating for wet locations when used with appropriate covers. PVC won't rust, corrode, or degrade in freeze-thaw cycles the way metal can in exterior applications. Threaded body means fewer parts and fewer potential leak points than knockout-style boxes with locknuts. Standard in the exterior rou Stocked at Crofton Lumber and Akron Lumber.