The Precision Model HWS (Hot Water Storage) heaters are commercial volume storage water heaters designed for industrial, commercial and institutional users who require quantities of service water and preset temperatures. Precision's electric storage water heaters are available in both vertical and horizontal configurations, and are ASME constructed and National Board registered for design pressure of your choice of 125 PSI or 150 PSI. They are constructed under ASME code section IV and stamped HLW. Storage capacities are from 125 gallons to 5500 gallons, and recovery from 62 to 1968 gallons per hour are cataloged with larger sizes available.