Restroom and shower units boast optional programmable door locks and lighted occupied signals. In self-contained floodplain units whereholding tanks are enclosed at rear of building, programmable door lock can be wired to a tank level indicator and outdoor red warning light. When tank reaches set capacity, doors lock automatically and red light indicates to maintenance personnel that tank requires service. Programmable door lock is ideal for remote sites where daily maintenance is difficult or sites where user traffic is heavy. Molded, seamless 1-piece fiberglass interiors require only hosing to clean. Gel-coated interior is graffiti-resistant. Fiberglass roofs endure heavy snow and wind loads. Choose from a variety of designs and finishes to match onsite architecture.