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THE Water Heater Company

Water Heater Installation in Southern California: What Homeowners Should Know

October 3, 2025

When the time comes to replace your water heater, knowing what to expect during the installation process can save you time, stress, and unnecessary costs. Most homeowners only replace their water heater once or twice in their lifetime, so it’s not something people are usually familiar with. This guide explains the essentials of water heater installation in Southern California — from choosing the right system to understanding how long installation takes.

Choosing the Right Water Heater

The installation process starts with selecting the correct system for your home. The two most common types of water heaters are tank water heaters and tankless water heaters.

Tank Water Heaters

  • Pros: Lower upfront cost, quick installation, reliable for standard household needs.
  • Cons: Larger size, limited hot water before refilling, higher long-term energy use.

Tankless Water Heaters

  • Pros: Endless hot water, compact design, improved energy efficiency over time.
  • Cons: Higher initial investment, longer installation process, likely requires upgrades to gas and/or electrical systems.

Homeowner tip: The best system depends on your needs, household size, hot water demand, and budget. A professional evaluation ensures the right fit for you and your home.

What to Expect During Installation

A professional installation generally includes these steps:

  1. Evaluation – A licensed technician checks your plumbing, gas, electrical, and exhaust systems to confirm compatibility.
  2. Removal of the Old System – The old unit is drained, disconnected, and properly disposed of.
  3. Installation of the New Water Heater – The new unit is installed with basic connections (this is where most contractors stop).
  4. Building & Safety Code Updates – An installation done in accordance with California Plumbing Code will likely require new features and adjustments, such as: a thermal expansion tank, bonding, drain pan, sediment trap, etc., and in the case of a tankless water heater, new venting and a dedicated gas line are often required.
  5. Final Walkthrough – The Technician tests the system, reviews operation with the homeowner, and provides maintenance recommendations to keep the unit running smoothly for years to come.

How Long Does Installation Take?

  • Tank Water Heaters: Typically 2–4 hours.
  • Tankless Water Heaters: May take 6–10 hours or longer if upgrades are required.

Homeowner tip: Our specialized Technicians do this every day and their experience helps keep the installation time to a minimum. Ask your installer how long you’ll be without hot water so you can plan ahead.

Why Professional Installation Matters

Water heater installation involves plumbing, gas, exhaust, and electrical connections. Hiring a licensed, experienced company ensures:

  • Safety for everyone in the home.
  • Correct system sizing.
  • Compliance with California building and safety codes.
  • Reliable hot water and long-term efficiency.
  • Warranty protection on parts, labor, and equipment.

THE Water Heater Company Difference

At THE Water Heater Company, we specialize exclusively in water heaters. Homeowners across Southern California choose us because we provide:

  • Expert Evaluations: Every installation starts with a thorough inspection of your home.
  • Straightforward Guidance: We explain your options clearly, with pros and cons, and lay out all available solutions so you can make the right choice.
  • Upfront Pricing: No hidden fees, just transparent estimates.
  • THE Best Technicians: Our team is extensively trained to provide the best service.

Get Help With Your Water Heater Installation

If you need a new water heater, we can help you choose the right system and install it safely and efficiently. Call THE Water Heater Company today at (877) 798-7487 to schedule a professional evaluation.

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