4.9 · Cherokee County's top-rated

Code Compliance · No Trip Charge

Expansion Tank Installation

If your home has a closed plumbing system, an expansion tank is required by code - and skipping it can void your water heater warranty. We install them correctly the first time.

New Water Heater from About $167/mo

Financing available. Get hot water today, pay over time.

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⭐ 4.9 · Google Reviews

Expansion Tank Install

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What's included

Everything in every expansion tank installation call

System pressure test

We verify your home has a closed system and measure water pressure before selecting the correct expansion tank size.

Correct sizing and installation

Expansion tanks are sized based on system pressure and water heater tank volume. An undersized tank provides little protection. We select the right size and install it on the cold water supply line.

Pre-charge verification

We verify the tank's air pre-charge matches your system pressure - a step that's often skipped and leads to premature tank failure.

"Parker was on time, very polite, and was able to resolve my issue. He was very efficient. No hidden fees, no runaround."

Connie Cunningham

Woodstock, GA · Water Heater Repair

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Warning signs

When you need an expansion tank

You have a pressure-reducing valve (PRV) on your main water line

You have a backflow preventer installed

A new water heater installation requires one by code

Your existing expansion tank is waterlogged or failed

T&P valve releases water periodically (a sign of thermal expansion)

Water pressure fluctuates noticeably throughout the day

A home inspection flagged the absence of an expansion tank

Your water heater warranty requires one

Seeing any of these right now?

Don't wait - small problems become flooded utility rooms fast.

Call (770) 334-4738 now

Simple process

Hot water back in 3 steps

Call or book online

Tell us about your setup. If you're not sure whether you need one, we'll assess it on arrival.

We assess and size

We check your system pressure and water heater size to select the correct expansion tank. This takes about 10 minutes.

Installed in about an hour

Expansion tank installation is a relatively quick job - typically under an hour once the correct tank is on hand.

Real installs

Our work across Cherokee County

Rinnai tankless + whole-home filtration

Rinnai outdoor tankless

Dual A.O. Smith replacement

Dual Rheem with expansion tanks

A.O. Smith + filtration system

Rheem Performance install

Dual A.O. Smith ProLine

50-gal A.O. Smith + filtration

What homeowners say

Real reviews from your neighbors

What homeowners are saying

Anthony Charles

Canton, GA

Water Heater Replacement

Our water heater went out with a house full of kids and no hot water. Water Heater Rescue answered right away, came out the same day, explained everything clearly, and gave a flat price upfront. No hidden fees, no runaround. We had hot water again that afternoon.

Connie Cunningham

Woodstock, GA

Water Heater Repair

Parker was on time, very polite, and was able to resolve my issue. He was very efficient. Matt was really helpful as well with the scheduling. Great job!

Stacy Howell

Woodstock, GA

Water Heater Service

Very knowledgeable and on time!

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Reviews are from real customers. Individual results may vary.

Transparent pricing

What affects the price

Every job is different. We give you an upfront flat-rate quote after diagnosing - before any work begins. No hourly billing, no surprises.

Tank size required (based on system pressure and water heater volume)
Location and accessibility of the installation point
Whether it's combined with a water heater installation or replacement

Get an upfront quote

We diagnose first, give you the full price - you approve before we touch anything. No hourly rates, no surprise add-ons.

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or book online

No trip charge · Same-day available · 15 min response

Financing available - about $167/mo

FAQ

Common questions about expansion tank installation

What is an expansion tank and why do I need one?

When water heats up, it expands. In an open plumbing system, that expanded water pushes back into the municipal supply. In a closed system (where a PRV or backflow preventer blocks that path), the expanded water has nowhere to go - which creates pressure spikes that stress your water heater, pipes and fixtures. An expansion tank absorbs that pressure.

How do I know if my home has a closed plumbing system?

If your home has a pressure-reducing valve on the main water line or a backflow preventer, you have a closed system. We check for this on every water heater installation.

Can I skip the expansion tank to save money?

We don't recommend it. In a closed system, skipping the expansion tank is a code violation in most jurisdictions, can void your water heater warranty and causes premature wear on the T&P valve - which is a safety device you don't want degraded.

My T&P valve drips occasionally - is that related?

Very likely yes. A T&P valve that periodically releases water is a classic sign of thermal expansion pressure in a closed system. An expansion tank typically resolves it.

How long does an expansion tank last?

5–10 years in most cases. The internal bladder eventually fails, at which point the tank becomes waterlogged and stops functioning. We check expansion tank condition during maintenance visits.

Still have questions? Call us at (770) 334-4738

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