Before operating the system, piping and tank installations shall be checked for oil leaks with fuel oil of the same grade that will be burned in the appliance. No other material shall be used for testing fuel-oil tanks and piping. Tanks shall be filled to maximum capacity for the final check for oil leakage.
Cal. Code Regs. Tit. 25, § 4522.8
Note: Authority cited: Section 18015, Health and Safety Code. Reference: Section 18025, Health and Safety Code.