Most people only deal with water heater installation once every 10–15 years — which means there’s a lot the average homeowner doesn’t know going in. After years of installations across San Jacinto, Temecula, Murrieta, and Riverside County, the team at Davis Plumbing and Heating Inc. has compiled the things customers consistently wish they’d known beforehand.
1. You Almost Always Need a Permit — and It Protects You
California requires permits for water heater installation and replacement — no exceptions. We know some companies skip this to save time and keep prices artificially low. But a permit protects you: it ensures the work is inspected, that your homeowner’s insurance remains valid, and that you won’t face surprises when selling your home. We always pull the permit.
2. “Same Brand” Doesn’t Mean “Same Price”
Getting a quote for a “Rheem 50-gallon” and expecting all installers to quote the same thing is a mistake. Water heaters have different model tiers with dramatically different quality levels, warranty terms, and expected lifespans. Always ask for the specific model number in your quote, not just the brand and size.
3. Your Expansion Tank May Be Required by Code
If your home has a pressure-reducing valve (PRV) — increasingly common in newer Riverside County homes — your plumbing is a “closed system.” California code requires an expansion tank on closed systems to prevent pressure buildup when water heats and expands. Many homeowners are surprised when their installer requires this extra component. It’s not an upsell — it’s code.
4. Seismic Strapping Is Mandatory in California
All water heaters in California must be secured with seismic straps. This isn’t optional — it’s required by state law regardless of the city you’re in. If a plumber quotes you a job without mentioning strapping, that’s a red flag.
5. Going Tankless May Require a Gas Line Upgrade
Many Riverside County homeowners want to switch from tank to tankless to save energy. What most don’t know: most gas tankless units require a ¾” gas line, but older homes often have ½” lines. Running a new gas line adds to the installation cost. We assess this upfront and include any needed gas line work in the estimate — not as a surprise add-on after the job starts.
6. Hard Water in San Jacinto Valley Cuts Water Heater Lifespan
The San Jacinto Valley and most of Riverside County have hard water — high in calcium and magnesium. These minerals form scale inside your water heater, reducing efficiency and lifespan. Without annual flushing and anode rod maintenance, a water heater in this area can fail 2–4 years sooner than its rated lifespan. Consider pairing your new unit with a water softener for maximum longevity.
7. The First-Hour Rating Matters More Than Tank Size
Homeowners focus on gallon size, but the First-Hour Rating (FHR) — how much hot water your heater can deliver in the first hour of peak use — is actually more meaningful. Two 50-gallon tanks can have very different FHRs depending on their burner BTU rating.
8. Installation Day Usually Takes Half a Day, Not an Hour
A proper water heater replacement takes 2–4 hours for a tank unit, longer for tankless. Permit coordination, seismic strapping, expansion tank installation, testing, and documentation all take time. Anyone promising a 45-minute water heater swap is either skipping steps or doing substandard work.
9. Federal Tax Credits Are Available for High-Efficiency Units
Under the Inflation Reduction Act, homeowners who install qualifying energy-efficient water heaters may receive a federal tax credit of up to $600 for heat pump water heaters or qualifying tankless units. Ask us which models qualify when we discuss your options.
10. The Cheapest Quote Is Rarely the Best Deal
A water heater that fails in 5 years instead of 12 because a budget unit was installed without proper maintenance guidance isn’t a bargain — it’s the most expensive option in the long run. Ask about the specific unit, the warranty, what’s included in the quote, and whether permits are pulled.
Work With a Plumber Who Tells You the Truth
At Davis Plumbing and Heating Inc., we believe an informed customer makes the best decisions. Call us at (951) 657-0393 for a free, no-pressure water heater consultation in San Jacinto, Temecula, Murrieta, Hemet, Menifee, and all of Riverside County.