Wherever there’s a need for a job site trailer, there’s also a need for a PolyJohn Enterprises holding tank. The tank is a durable, sanitary receptacle used for collecting waste in portable restrooms. It’s a necessity for long-term portable sites where indoor plumbing is not an option. Made from highly durable plastic, the design is functional and discreet. It’s also compatible with other PolyJohn restrooms and sinks, and can be easily configured with most any type of plumbing. For outdoor work sites or special events, it can be used to complete any portable restroom area. Tanks are available in 250- and 300-gallon capacities. 800/292-1305; www.polyjohn.com.