R 408.10916 Gravity, suction, and pressure tanks.

Rule 916. (1) A gravity or suction water tank shall be maintained at the full water level designed for fire protection purposes. (2) The water and air in a pressure water tank shall be maintained at the designed levels and pressures. (3) The water in a gravity, suction, or pressure tank and risers shall be maintained above freezing temperature. Where a heater is used, the water temperatures shall be not more than 60 degrees Fahrenheit. (4) A steel water tank shall be inspected not less than every 3 years for deterioration and, when necessary, repairs made. (5) A wooden water tank shall be inspected not less than every 2 years for deterioration and, when necessary, repairs made.