Right now your water heater is coasting. Incoming water from the Inland Empire mains is running warm, the burner cycles less, and a tank that is half full of sediment still keeps up. That changes in about six weeks. Once nights drop into the 40s and incoming water gets colder, the heater has to work harder for longer, and the weak parts fail on the first cold morning.
The consequence of skipping this is not subtle. A tank that has been quietly rusting under a scale layer usually announces itself as a puddle on the garage floor — and a leaking tank is a replacement, not a repair. Water heater maintenance in San Bernardino is cheap in September and expensive in December.
Why hard water makes this a local problem
Water across San Bernardino, Rialto, Fontana, and Colton runs hard. Dissolved calcium and magnesium drop out of the water when it heats and settle on the bottom of the tank as scale. That layer insulates the burner from the water above it, so the steel gets hotter than it should while your showers get shorter.
Garage installs make it worse in both directions. A heater sitting in an uninsulated San Bernardino garage bakes at 105 degrees all summer, then loses standby heat to a 45-degree slab in January. Most Inland Empire homes put the heater exactly there.
Plan on a tank water heater lasting 8 to 12 years here, closer to 8 if it has never been flushed. Tankless units run around 20 years, but they need descaling on the same hard-water schedule — roughly once a year.
The pre-winter checklist
- Find the age on the data plate. The serial number on the label usually encodes the month and year of manufacture. If you are past 10 years, shift your thinking from repair to planning a replacement on your schedule instead of the tank's. DIY.
- Look at the floor and the fittings. Rust streaks down the side of the tank, white crust on the water connections, or a damp spot in the drain pan all mean water is already getting out somewhere. A weep at a fitting can wait a week. Water coming from the tank body cannot. DIY to check, pro to fix.
- Flush the tank. Hook a hose to the drain valve at the bottom, shut off the cold inlet, and run several gallons until it comes out clear instead of gray and gritty. This is the single item that adds years to a heater in hard water. DIY if you are comfortable, though old plastic drain valves crack and stick—that is the moment to stop and call.
- Test the T&P valve. The temperature and pressure relief valve is the safety device that dumps water if the tank overpressurizes. Lift the lever, let it discharge into a bucket, and make sure it seats and stops. If it dribbles afterward, it needs replacing. DIY to test.
- Check the anode rod. The anode is a sacrificial metal rod that corrodes so your tank doesn't. In hard water it can be eaten down to bare wire in three to five years. Once it's gone, the tank lining is next. Pro — it takes a breaker bar and clearance above the tank most garages don't have.
- Set the thermostat to 120 degrees. Higher settings scald and accelerate scale buildup. Lower than 120 invites bacteria growth in the tank. DIY on an electric unit at the panel dial or a gas unit at the control valve.
- Look at the venting and the burner. On a gas heater, the flame should be blue and steady, the draft hood clear, and the flue pipe sloping up and away with no gaps. Soot, a yellow flame, or a scorched-looking jacket means combustion trouble. Pro, always. Gas and venting are not homeowner territory.
- Confirm the seismic straps and the drain pan. California code requires two straps, upper and lower third of the tank. If yours has one strap, or plumber's tape, that gets corrected at the next service. DIY to look at.
What the symptoms usually mean
Hot water runs out faster than it used to: sediment first, taking up volume at the bottom of the tank. Second, a broken dip tube letting cold water short-circuit to the top. Third, a failed lower heating element on electric units.
Rumbling or popping when the burner fires: that is water boiling under the scale layer. Not dangerous today, but it's the tank telling you the flush is overdue.
Rusty hot water only: the anode is spent and the tank lining is corroding. Rusty hot and cold water: the problem is your supply lines, which in mid-century San Bernardino and Colton homes often means original galvanized pipe.
What replacement actually costs
Nationally, a standard 40 to 50 gallon gas tank replacement typically runs $1,200 to $2,500 installed. Tankless conversions typically run $3,000 to $6,000 because they need larger gas lines and new venting. What pushes a job to the high end: tight garage or closet access, upsizing the gas line, adding an expansion tank, bringing venting to current code, and the permit that a water heater swap normally requires here. Local quotes vary, so get the estimate in writing before anyone pulls the old unit.
Right now we're running an $80 water heater maintenance special, which covers the flush and inspection side of this list. Estimates are free and done in person.
If you do one thing
Flush the tank. It costs a garden hose and forty minutes, it directly counters the hard water that kills heaters early in this valley, and it gives you a look at the drain valve, the floor, and the fittings while you're down there. Everything else on this list can wait a couple of weeks. That one shouldn't.