(A) All closed looped systems with a water heater or boiler system shall include a thermal expansion tank. The tank shall be located on the downstream side of the heating unit. Expansion tanks shall be installed in accordance with state plumbing codes. Units shall not have a capacity less than the following.
Existing Water Heater Size (Gallons) | Supply Pressure (PSIG) | Expansion Tank Capacity (Gallons) |
0-20 | 0-60 | 2.0 |
30-120 | 0-80 | 4.0 |
30-120 | 0-100 | 10.0 |
(B) For larger capacity units, consult manufacture listed rating.
(1998 Code, § 9-136) (Ord. 582, passed - -1996)