October is the month to get your water heater ready for cooler Inland Empire nights. Skipping a quick check can leave you with cold showers or a leaking tank when overnight temperatures drop—especially in San Bernardino garages where heat swings and hard water add stress to the unit.
Quick seasonal checklist (do these this October)
- Flush the tank - DIY: Drain 1–2 gallons to remove sediment. Hard water in Fontana and Rialto accelerates sediment buildup; a short flush takes 10–20 minutes and helps restore capacity.
- Check the anode rod - Pro if corroded: An anode rod protects steel tanks from corrosion. If it’s more than 50% consumed, replacement usually costs in the national typical range of $100–$300. Replacing a badly eaten rod is cheaper than replacing a tank.
- Test the temperature-pressure (T&P) relief valve - DIY with care: Lift the valve’s lever to watch for a brief stream from the discharge pipe. No flow or continuous leaking means the valve should be replaced by a plumber; valves are a low-cost part but a wrong swap risks scalding.
- Inspect the drain pan and discharge lines - DIY: Look for rust, standing water, or disconnected drains under the tank. On slab homes in San Bernardino, a leaking heater that drains into the slab can cause hidden damage.
- Check for leaks or corrosion at fittings and unions - Pro if behind walls: Visible threaded fittings and the cold/hot water connections you can reach are safe to inspect. Anything weeping inside walls or ceilings requires a licensed plumber and possibly a camera inspection.
What to check for in older Inland Empire homes
Homes built mid-century often still have galvanized or cast-iron supply lines that restrict flow and corrode. Low hot-water pressure that starts in one fixture is most likely sediment in the heater or a clogged aerator; if low pressure is house-wide, suspect corroded supply lines or a failing dip tube. Dip tubes typically last 5–15 years—if your house has a tank older than 10 years, plan on replacement sooner rather than later.
When to call a 24/7 plumber
Call a pro immediately for any active leak, continuous T&P valve discharge, gas smell near a gas water heater, or no hot water at all on a cold morning. These are signs that can lead to water damage or safety hazards today. For non-urgent issues, such as low pressure, odd noises (popping or rumbling from sediment), or routine anode rod replacement, schedule service within a week to avoid escalation. If you need emergency help, our 24 hour emergency plumber in Fontana page explains how that service works in the area.
Costs and what pushes the price up
Typical national ranges: tank water heater replacement $800–$2,500; tankless replacement $1,200–$3,500; anode rod $100–$300; T&P valve replacement $75–$200. Jobs climb toward the high end when the unit is in a closet or attic, when code requires a seismic strap, expansion tank, or drain pan and permit, or when pipe material needs replacement (galvanized to copper/PVC). Accessibility in tight San Bernardino garages or retrofitting for tankless venting are common cost drivers locally.
DIY vs. pro — a clear line
Safe DIY checks: flushing a few gallons, testing the T&P valve lever, looking for visible leaks, and checking the pilot light or breaker. Stop and call a licensed plumber for: gas line work, any repair that requires working behind finished walls, replacing the gas control or burner assembly, major pipe replacements, or if you see a gas smell. Water heater swaps typically require permits in California; a pro handles those details and common code additions like expansion tanks and seismic straps.
The one thing to do first
If you do nothing else this month, locate and verify the water shutoff for the heater and the house main. Everyone in the household should know where that valve is—turning it off stops most urgent leaks immediately and limits water damage. After that, run the short checklist above or book a pro for the items you can’t safely do yourself.
Related reading: homeowners in the Inland Empire may also find our water heater winter checklist and guidance on drain cleaning in Rialto helpful when preparing plumbing for seasonal change.