Water Heaters

Water Heater: an appliance designed to supply hot water. A water heater is equipped with automatic controls limiting water temperature to a maximum of 210° Fahrenheit (98.9° Celsius) (California Plumbing Code ((CPC)) 502.13).

If you should have any questions or comments, please contact an inspector at 650-991-8061.


  1. Permit
  2. Installation
  3. Temperature / Pressure Relief Valve
  4. Tankless Water Heaters
  5. Excessive Water Pressure
  6. Water Heater Expansion Tank
  7. Protection Against Physical Damage
  8. Special Daly City Requirements
  9. Water Heater Sizing

Permit Requirements

A plumbing permit is required to install, remove, replace, or raise a water heater (CPC 503.0). A permit must be obtained before beginning the work. Work performed without permit may be subject to investigation or enforcement fees.

Permits to replace tank-type water heaters can be obtained over the counter. Please assure that the replacement unit meets the First Hour Recovery sizing of CPC Table 5-1 (shown on the Water Heater Sizing tab).