Safety ·
Do I Need an Expansion Tank on My Water Heater?
If your home has a pressure regulator or check valve, you likely need an expansion tank. Here is why, and what happens without one.
Key takeaways
- Closed plumbing systems usually require a thermal expansion tank.
- Without one, pressure spikes stress the tank, valves and fixtures.
- Stainless connections resist corrosion better than basic connectors.
Water expands when it heats up. In a closed system, that extra volume has nowhere to go, and pressure spikes every time the water heater runs.
When it is required
Homes with a pressure regulator, backflow preventer or check valve are closed systems, and code typically requires an expansion tank.
Signs of thermal expansion problems
- A dripping T&P valve.
- Running toilets.
- Banging pipes.
- Leaking faucets.
Stainless steel connections
We pair expansion tanks with corrosion-resistant stainless steel connections to protect your new water heater from the start.
Protect your plumbing
We check and install expansion tanks as part of every replacement. Call HOTCO at (916) 905-4468. We answer 24/7 and serve Roseville, Rocklin, Lincoln, Granite Bay, Folsom, Sacramento and the rest of Placer and Sacramento Counties.
Frequently asked questions
- How long do expansion tanks last?
- Typically 5 to 10 years. We check yours during service.
