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Top 7 Things No One Tells You About Water Heater Installation in San Diego

  • dj1220131
  • 3 days ago
  • 4 min read


Thinking about getting a new water heater in San Diego? Most people think that's all it takes—pick a model and have it installed. Simple, right? Not quite.

Because there's always a twist to installing a water heater in San Diego. You're replacing an old system or doing a new installation, and there are a couple of things-that you want to know ahead of calling in the experts.

It is not quite different from remodeling your kitchen. Much happens behind the walls. In this article, we will reveal the top seven things that no one tells you about installing a water heater in sunny San Diego.

1. It’s Not Always a Quick Job

You might think replacing a water heater is a quick "in and out" job. But depending on your home’s layout, age, and plumbing system, installation can take anywhere from a few hours to an entire day.

Things like tight access, outdated piping, or unexpected damage can slow things down. Be sure to ask your installer for a realistic timeline based on your setup.

2. Permits Are a Must in San Diego

Here’s a little-known fact: the city of San Diego requires permits for water heater installation. This applies to all types of San Diego water heater installation, including both tank and tankless systems."

A reputable installer will take care of this for you, but DIYers often overlook this step — which can result in fines or forced removal if discovered during a home inspection or sale.

3. Old Units Can Be a Nightmare to Remove

Water heaters aren’t light — and some older models are rusted in place or connected with outdated materials. Removing them without causing damage can be tricky.

This is especially true in homes with tight closets, attics, or garages where space is limited. Sometimes walls or doors even need to be temporarily removed!

4. You Might Need an Upgrade to Meet Code

Building codes change over time, and your new heater must meet current standards. That might mean updating gas lines, electrical wiring, or adding a drip pan and seismic straps — especially important in earthquake-prone California.

Installers are required to bring your setup up to code, which could add costs you didn’t anticipate.

5. Hard Water Can Shorten Lifespan

San Diego has hard water — rich in calcium and minerals. Over time, this builds up inside your tank, reducing efficiency and lifespan.

Installing a water softener or filtration system alongside your new water heater can help protect your investment.

6. Choosing the Wrong Size Is Costly

Water heaters come in different sizes, typically measured in gallons or flow rate. Too small, and you’ll run out of hot water fast. Too big, and you’re paying to heat more water than you need.

A good installer will consider your home’s size, number of occupants, and usage habits to recommend the perfect size.

7. Tankless Isn’t Always Better

Tankless water heaters sound like a no-brainer — endless hot water and energy savings? Yes, please. But they’re not ideal for every home.

They often require larger gas lines, special venting, and higher upfront costs. Plus, in homes with high simultaneous demand (multiple showers or appliances running), a traditional tank might still be more practical.

8. Location Matters More Than You Think

Where your water heater is installed affects not only convenience, but also energy efficiency and even safety. A poorly ventilated garage or tight indoor closet can be hazardous or inefficient.

Installers may suggest relocating your unit for optimal performance — which can increase the complexity (and cost) of the job.

9. Energy Efficiency Ratings Are Gold

Water heaters are labeled with EF (Energy Factor) or UEF (Uniform Energy Factor) ratings. The higher the number, the more efficient the unit.

Choosing an energy-efficient model may cost a bit more upfront, but it will save you significantly on your monthly utility bills.

10. Proper Ventilation Is Crucial

Especially for gas water heaters, ventilation is key to preventing dangerous buildup of carbon monoxide. Newer models often require different venting systems than older units.

Your installer should check existing vents or ducts and update them if necessary to meet current safety codes.

11. Leaks Happen — Even with New Installs

You just got a brand new unit… and now there’s water pooling on the floor? Don’t panic. Some leaks are harmless (like pressure relief valve drips), but others signal poor installation or defective parts.

Make sure you get a warranty and post-install inspection to catch any early issues.

12. Warranty Isn’t Always What It Seems

Manufacturers often boast 6, 9, or even 12-year warranties. But did you know they usually only cover parts — not labor?

Some warranties also become void if the unit isn’t installed by a licensed professional. Always read the fine print and ask your installer what’s included.

13. Rebates and Tax Credits Can Save You Big

Installing a high-efficiency or ENERGY STAR-certified water heater can qualify you for rebates from utility companies and even federal tax credits.

Before you buy, check local programs. In San Diego, SDG&E frequently offers rebates for qualifying installations.



14. DIY? Think Twice

Installing a water heater is not a weekend DIY project. It involves plumbing, gas, and possibly electrical work — all of which must meet code.

One wrong move can lead to gas leaks, water damage, or serious injury. It’s worth hiring a licensed, insured pro to get the job done right.

15. Hiring Local Experts Makes a Difference

Local pros understand San Diego’s climate, housing styles, and permit requirements. They’re more likely to be familiar with energy rebates and city-specific building codes.

Hiring a local water heater installer ensures the job goes smoothly and stays up to code — saving you headaches down the line.

Conclusion

San Diego water heater installation might seem straightforward, but as you've learned, there’s a lot more beneath the surface. From permits and plumbing codes to sizing, hard water, and energy efficiency, each step plays a role in how your system performs over time.

Knowing what to expect can help you avoid surprise costs, installation delays, and future repairs. So before you install — do your research, ask the right questions, and don’t skimp on quality.

EZ Plumbing USA offers 24/7 professional plumbing services across San Diego, Orange County, and Riverside. They specialize in leak detection, emergency repairs, and water heater services for homes and businesses. Contact us for more information.

 
 
 

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