4.9/5 — 2,000+ Five-Star Reviews
Gas Tank Water Heater Installation & Repair
Bay Area's #1 Choice
Professional integration of atmospheric and power-vented storage systems with a focus on burner safety and thermal expansion management.
- 25+ Years
- Licensed & Insured
- 24/7 Emergency
- No hidden costs
- Same-day service
- Fully licensed and insured
- 6000+ completed jobs
Google Rating
5
.9★
Five-Star Reviews
1900
+
4.9/5 Rating
2,000+ Reviews
Licensed & Insured
CA Licensed
Same-Day Service
24/7 Emergency
25+ Years
Bay Area Experts
6,000+
Jobs Completed
Simple Process
How It Works
1
Call Us 24/7
Reach us anytime at
(408) 617-8871.
2
Same-Day Dispatch
A licensed technician arrives at your home, often same day.
3
Diagnose & Fix
Upfront pricing before work begins. No hidden fees, ever.
4
100% Satisfaction
We stand behind every job with our satisfaction guarantee.
Professional Gas Tank Water Heater Installation & Repair Services
Reliable hot water solutions to keep your home running smoothly.
Whether your current unit is acting up or it’s time for a high-efficiency replacement, our expert technicians provide comprehensive gas water heater solutions tailored to your household’s needs. With 25+ years of experience serving the Bay Area, we deliver the quality workmanship and safety you can trust.
Why Trust Our Water Heater Experts?
Full-Service Solutions: Whether you need a routine maintenance check, an emergency repair for a pilot light issue, or a complete system upgrade to a new gas tank model, we have you covered.
Safety & Precision: We use state-of-the-art diagnostic equipment and strictly follow industry safety standards to ensure your gas lines and tank are installed or repaired correctly the first time.
Transparent Pricing: No surprises on your bill. We believe in upfront, transparent pricing—you’ll always know the exact cost before we start any work.
Guaranteed Results: Your comfort is our priority. All of our installations and repairs come with a satisfaction guarantee and comprehensive warranty coverage.
Don’t get left in the cold.
From fixing minor leaks to installing the latest energy-efficient tanks, our team is dedicated to providing the Bay Area with fast, professional, and lasting hot water solutions.
100% Satisfaction Guarantee
If you're not completely satisfied with our work, we'll come back and make it right — free of charge. That's our promise to every customer.
Signs You Need Gas Tank Water Heater Installation & Repair
- Sediment "kettling" and popping sounds in the tank
- Failing thermocouples and pilot light instability
- Breached internal glass lining and base weeping
- Depleted sacrificial anode rods causing tank corrosion
- Malfunctioning temperature and pressure (T&P) relief valves
- Compromised burner assemblies and gas valve failures
Why Choose United HVAC
- 25 years of experience
- Same-day service
- 1+ year warranty
- 6000+ completed jobs
- 0% interest financing and discounts
- Fully licensed and insured
- Well reviewed and highly trusted
- No hidden costs
- We work 365 days a year
Got Questions?
Frequently Asked Questions
What are the signs that my gas water heater is failing?
The most common indicators include "rusty" or discolored hot water, a slow recovery time (taking longer to get hot water back after a shower), and unusual popping or rumbling noises coming from the tank. If you see water pooling in the drain pan or around the base of the unit, the internal tank has likely fractured due to corrosion and requires immediate replacement.
How long does a standard gas water heater typically last?
Most residential gas tank heaters have a lifespan of 8 to 12 years. This depends heavily on local water hardness and whether the unit has been regularly maintained. In 2026, we recommend checking the age of your unit via the manufacturer's serial number; if it’s over a decade old, it is statistically prone to a sudden tank failure.
Why do I hear a "popping" or "knocking" sound when it’s heating?
This is usually caused by sediment buildup (calcium and magnesium) at the bottom of the tank. As the gas burner heats the metal floor of the tank, water trapped underneath the sediment layer boils and "pops" through the crust. This buildup acts as an insulator, forcing the burner to run longer and eventually causing the bottom of the tank to overheat and fail.
How long does it take to replace a gas water heater?
A professional installation typically takes 2 to 4 hours. This includes safely disconnecting the gas line, draining, and removing the old tank, installing the new unit, and reconnecting the water, gas, and exhaust venting. We also perform a mandatory gas leak test and a carbon monoxide draft test before completing the job.
What is the benefit of a "Power Vent" vs. an "Atmospheric" gas heater?
Atmospheric heaters vent naturally through a vertical chimney using hot air buoyancy. Power vent models use an integrated fan to push exhaust gases through a horizontal PVC pipe. Power vents are more efficient and allow for installation in areas without a traditional chimney, though they do require a nearby electrical outlet to power the fan.
Why is my pilot light constantly going out?
This is often caused by a faulty thermocouple—a safety sensor that detects the flame. If it’s bent or covered in carbon soot, it won't signal the gas valve to stay open. In newer "sealed combustion" units, a clogged air intake screen can also starve the flame of oxygen, causing it to extinguish repeatedly.
Is a thermal expansion tank necessary?
Yes, most local codes now require one. When water is heated, it expands. In a "closed" plumbing system, this expansion creates high-pressure spikes that can damage your pipes and the water heater itself. An expansion tank provides a safe "cushion" for this extra volume, significantly extending the life of your heater.
What should I do if I smell gas near the water heater?
If you smell a "rotten egg" odor, do not flip any light switches, or start any appliances. Immediately turn the gas shut-off valve (usually located on the pipe leading to the heater) to the "off" position, evacuate the area, and call for emergency service. We provide 24/7 support to locate the leak and secure the gas line.
How often should I drain and flush my water heater?
We recommend a professional flush once a year. This removes the sediment that causes "popping" sounds and efficiency loss. During this service, we also inspect the anode rod. Replacing a spent anode rod can potentially double the lifespan of your water heater.
Do you provide 24/7 emergency service for water heater leaks?
Yes. A leaking gas water heater can lead to significant flooding and potential gas hazards. We provide 24/7 emergency response to shut down the water and gas supply, diagnose the failure, and perform an immediate repair or replacement to protect your home and restore your hot water.
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Serving the Bay Area
Gas Tank Water Heater Installation & Repair Available In
We proudly serve homeowners across the entire Bay Area
Don’t see your city? Call (408) 617-8871 to check availability.