Annual Water Heater Maintenance Checklist

By Water Heater Leak Repair Contractors — Published September 30, 2026 — 13 min read

A water heater is the most neglected appliance in most homes — out of sight in the garage or basement, silently working until the day it isn't. Yet an hour of annual maintenance prevents the majority of leaks we repair and adds years to the tank's life. Here's the complete checklist, in the order we perform it on professional service visits.

The yearly checklist

Test the T&P valve: lift the lever briefly; water should flow, then stop fully when released.
Flush sediment: drain several gallons (or a full flush for older units) until water runs clear.
Inspect the anode rod: pull and check every 2–3 years; replace when heavily corroded.
Check all valves and connections: look for weeping at the drain valve, inlet/outlet, and T&P.
Verify temperature setting: 120°F is the safe, efficient standard.
Test water pressure: high pressure (above 80 PSI) stresses every component.
Inspect the vent (gas): clear, properly sloped, no corrosion or blockage.
Look at the pan and drain: confirm the pan is intact and the drain line flows.
Check for rust: any new rust streaks get investigated, not ignored.

What homeowners can DIY vs. what needs a pro

Temperature checks, visual inspections, and listening for new noises are great DIY habits. Flushing, anode-rod service, and anything involving gas, pressure, or electrical work belong to a professional — the scald and safety risks are real, and a pro spots the early warning signs an untrained eye misses.

The Westfield factor

Local water conditions and the area's stock of builder-grade units make the anode-rod check especially important here — we find consumed rods constantly in 5–10-year-old subdivision tanks. A $200–$400 rod replacement that adds years to your tank is the best deal in this checklist.

Put it on autopilot

The best maintenance is the kind you don't have to remember. Call (833) 713-2101 to schedule annual service — we'll handle the full checklist, document your heater's condition, and warn you well before small issues become leaks.

Need Help With Your Water Heater?

Don't wait — call us now at (833) 713-2101 for fast, upfront-priced service.

Call Now: (833) 713-2101

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Frequently Asked Questions

How much does professional maintenance cost?

A standard annual service visit runs in line with our diagnostic rate — far less than any leak repair.

Is flushing really necessary every year?

For most households, yes — especially with harder water. Skipped flushes are the #1 preventable cause of premature tank failure we see.

What if my heater has never been serviced?

Start now — it's never too late. We'll assess condition honestly and prioritize what matters most.