§ 52.069 "SPECIAL CAUTION" THERMAL EXPANSION.
   When water is heated and stored in a consumer's water system, or a branch of the system, that has been closed by the installation of a backflow prevention device, or any other checking device, an auxiliary relief valve, or expansion chamber, shall be installed to limit thermal expansion of the water being heated to not more than 80 psi static (no-flow) pressure at any fixture on the system.
(1990 Code, § 3-131) (Ord. 413, passed 1-4-1994)