Water Heater Inspections: Age, Venting, and Safety
By David Parks · eXp Realty · The Apollo Group · 2 min read
The Short Answer
A water heater inspection checks the unit’s age, condition, venting, and safety valves. Tank water heaters typically last about 8 to 12 years, and tankless units often last longer with maintenance.
Illustration by David Parks
What it does
The water heater supplies hot water for showers, dishes, and laundry. Most homes use a gas or electric tank, while tankless models heat water on demand.
How to read the age
Look for the manufacturer’s label with a serial number, which usually encodes the manufacture date. A unit near or past 10 years deserves a replacement budget even if it works today.
Quick Poll
Have you ever dealt with a water heater problem?
You are not alone. Get the findings in writing from a licensed professional, keep photos and receipts, and if you are buying, use the report as a negotiation point before your inspection deadline. Talk with David if you want a second opinion on what matters.
Good news, but this is exactly the kind of issue that can stay hidden until someone looks. Add it to your inspection checklist or ask your inspector about it before you buy or sell.
That is very common. The simplest way to know is to have it checked. Ask David which inspections are worth adding for the home you are considering. Talk with David.
What inspectors check
Temperature and pressure relief (TPR) valve and discharge pipe.
Gas venting and combustion air for gas models, which matters for carbon monoxide safety.
Rust, leaks, or corrosion at the base and fittings.
Shutoff valves and proper support.
Expansion tank where required.
Buyer tip
If the unit is aging, ask the seller for the install date and service history. A new unit is a predictable expense, and you can use that in your budget. Flush the tank periodically to help it last.
Key Takeaways
What it does: The water heater supplies hot water for showers, dishes, and laundry.
How to read the age: Look for the manufacturer’s label with a serial number, which usually encodes the manufacture date.
What inspectors check: Temperature and pressure relief (TPR) valve and discharge pipe.
Buyer tip: If the unit is aging, ask the seller for the install date and service history.
This article is general information, not legal, tax, financial or inspection advice. Every home and situation is different, so confirm details with a licensed inspector, lender, attorney or tax professional.
David is a Greater Denver real estate advisor with eXp Realty and The Apollo Group (Colorado broker license FA100103211). He has closed more than $55 million in volume, earned eXp Icon status in 2025, and holds a 5.0 rating on Zillow from 27 verified reviews.
