Expansion Tank Installation
Licensed & Insured · Serving 65+ Utah Cities
Expansion Tank Installation
Prevent Pressure Spikes When Your Water Heater Heats
Serving Utah County, Salt Lake County, Davis County, Wasatch & Summit County
500+ Reviews
When your water heater heats water, the water expands. In a closed plumbing system with a PRV or check valve installed, that expansion has nowhere to go — pressure spikes dangerously. An expansion tank absorbs this expansion, preventing pressure from building to unsafe levels. It's a small, inexpensive tank that saves your plumbing system from damage and is required by Utah code when a PRV is installed.
The Details
What You Need to Know
Water is nearly incompressible. When heated from 50°F to 130°F, a gallon of water expands by about 3%. In a typical home with a 50-gallon water heater, that's 1-2 gallons of extra water with nowhere to go. Without an expansion tank, pressure inside your plumbing system rises rapidly — sometimes to 100+ PSI — stressing pipes, water heater relief valves, and fixtures.
An expansion tank is a sealed vessel with an air bladder inside. As pressure increases from thermal expansion, water enters the tank and compresses the air inside. This creates a cushion that absorbs the pressure spike and protects your plumbing. The tank is pre-charged with air to match your normal water pressure.
Utah's Uniform Plumbing Code (IECC 2021) requires an expansion tank when a PRV is installed. The code recognizes that PRVs prevent water from being pushed back into the municipal system, meaning expansion has nowhere to go. An expansion tank solves this problem and is now standard on new installations. If your system has a PRV but no expansion tank, you're not code-compliant.
How It Works
Our Expansion Tank Installation Process
Check if your water heater has a PRV and/or check valve. If either is present, a…
Check if your water heater has a PRV and/or check valve. If either is present, an expansion tank is needed.
Calculate the right expansion tank size based on your water heater capacity and …
Calculate the right expansion tank size based on your water heater capacity and incoming water pressure.
Mount the expansion tank on the cold water inlet to your water heater, closest t…
Mount the expansion tank on the cold water inlet to your water heater, closest to the tank.
Measure system pressure after installation and verify that pressure spikes durin…
Measure system pressure after installation and verify that pressure spikes during heating are controlled.
Annual inspection ensures the air charge in the tank is correct (may need adjust…
Annual inspection ensures the air charge in the tank is correct (may need adjustment over years).
Real Results in Utah Homes
Our Work
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The AYSP Difference
Why Utah Homeowners Choose Us
Protect Your Water Heater
Pressure spikes stress the water heater tank and relief valve. An expansion tank extends water heater life by years.
Prevent Burst Pipes
Extreme pressure spikes from uncontrolled thermal expansion can burst water supply lines. An expansion tank prevents this.
Stop Relief Valve Dripping
A water heater relief valve that drips constantly is responding to thermal expansion. An expansion tank stops the dripping.
Works with Your PRV
If you have a Pressure Reducing Valve, an expansion tank is essential. Together they protect your entire system.
Utah Code Required
Required by Utah code when a PRV is present. Code compliance matters for inspections and home sales.
Local Service
Expansion Tank Installation Across Utah
We provide expansion tank installation services to homeowners across the Wasatch Front and surrounding areas. Same-day service available in most locations.
Got Questions?
Expansion Tank Installation FAQ
?Do I need an expansion tank if I don't have a PRV?
?How do I know if my water heater needs an expansion tank?
?What size expansion tank do I need?
?How much does expansion tank installation cost?
?How long do expansion tanks last?
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Resources & Related Services
Related Plumbing Services
Find out if your water heater needs an expansion tank
Serving homeowners across Utah County, Salt Lake County, Davis County, and beyond. Schedule a service call or explore our free guide to learn more.