Patterson-Kelley P-K Compact is a steam-fired water heater designed for commercial and industrial applications. It offers high performance and close temperature control, making it ideal for use in facilities with high hot water demands. The P-K Compact is a fully packaged unit that includes a shell insulated and covered with a reinforced PVC jacket, a steam control valve, a steam pressure gauge, a thermometer, a circulation pump, a relief valve, and a double solenoid temperature-limit system.