The situation

Illustrative example. Not a real job or customer.

Just before midnight, a homeowner walks into the garage and finds a spreading puddle around the base of a gas tank water heater that is many years old. Water is seeping steadily from underneath the tank, not from the pipes on top.

  1. They sniff for gas first. There is no rotten-egg smell, so they stay.
  2. They close the cold-water valve on the line entering the top of the tank.
  3. They turn the gas control on the heater to off.
  4. They decide not to drain the hot tank yet; instead they let it cool and sweep water toward the garage door.
  5. They move stored items off the floor and photograph the tank, label and puddle.

With the supply closed, the seep slows to a drip. The rest of the house still has cold water because only the heater's supply was closed.

Tonight or tomorrow?

  • IfThe leak slowed once the cold supply was closedThe homeowner decides to wait for a daytime appointment.
  • IfThe leak had kept flowing with the supply closedThey would have closed the house main as well.
  • IfThey had smelled gasThey would have left and called 911 or SoCalGas from outside.

The next morning

  1. License check.The homeowner calls two licensed plumbers and checks each license at cslb.ca.gov.
  2. Confirm the failure.The plumber confirms the inner tank has corroded through, which cannot be repaired.
  3. Written options.The plumber provides written options for a like-for-like tank and for other types, noting any venting or gas line changes each would need.
  4. Permit and strapping.The plumber explains that the replacement will be permitted and seismically strapped, and the homeowner confirms requirements with the City of Brea.

The choice: same type or switch

Like-for-like tank

  • Usually fits existing venting and gas line.
  • Simplest and quickest to install.
  • Same sediment upkeep in hard water.

Switch to tankless

  • May need gas line, venting or electrical changes.
  • More of a planned project than an emergency swap.
  • Needs periodic descaling in hard water.

What this example shows

A leaking tank feels like an emergency, and the water does need to be stopped. But once the cold supply and gas are off, the house is safe and the rest of the plumbing still works. That often makes it reasonable to choose a contractor in daylight rather than hiring the first answer at midnight.

In Brea's hard water, sediment shortens tank life. The homeowner in this example adds a flushing reminder to their maintenance calendar for the new unit.

Common questions

Is this a real job?
No. It is an invented example.
Why not drain the tank right away?
Tank water can be scalding. Letting it cool first is safer.
Can the old tank be patched?
A tank leaking from its body cannot be repaired. Fittings and valves sometimes can.

General information for Brea, not a quote or professional advice. In an emergency, call 911.