Water Heater Installation & Replacement in Alpharetta, GA
Tank-style gas or electric water heater installs and replacements across Alpharetta. Code-compliant venting, expansion tank, drain pan, permit pulled where required. We size the unit honestly for your household, not for the upsell.
Most water heater replacements in Alpharetta are reactive — the old unit has failed or is failing fast. A smaller share are proactive replacements timed to avoid catastrophic failure on a unit nearing end of life. Either way, the install matters more than the brand on the box: the venting, the expansion tank, the drain pan, the gas line connection, the T&P discharge routing. Get those right and a properly-sized unit lasts its full service life.
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Sizing and unit selection — getting this right matters
A water heater that's too small for your household runs out of hot water mid-shower. One that's too large costs more upfront and wastes energy keeping unused water hot. Sizing is straightforward when done right:
Tank capacity is selected from peak-hour demand — the maximum hot water draw in any 60-minute window. For most Alpharetta single-family homes, a 40-gallon tank serves a 1–2 person household, 50 gallons for 3–4 people, 75 gallons for 5+ or for homes with luxury shower fixtures, multiple bathrooms in simultaneous use, or large tubs.
Fuel type usually follows what's already there. Replacing gas with electric is expensive (new dedicated 240V circuit, new breaker, possibly new panel capacity). Replacing electric with gas is expensive (running a new gas line, sometimes upsizing the meter). Replace like with like unless you have a specific reason to switch.
Brand matters less than installation quality. We install Rheem, Bradford White, and AO Smith — all reliable in this market. Where the brand matters is on warranty length: 6-year, 9-year, and 12-year warranty units are increasingly distinct equipment, not just the same unit with different paperwork.
If you're replacing a tank-style heater and considering switching to tankless, see tankless water heater services — different sizing math, different gas line implications, different install considerations.
What a code-compliant install actually looks like
The differences between a good install and a bad install aren't visible until something goes wrong. Here's what we always include:
Expansion tank. Required by code on closed plumbing systems (which is most Alpharetta installations because Fulton County's water meters now include backflow check valves). Without an expansion tank, thermal expansion of heated water has nowhere to go and the T&P relief valve drips every cycle.
Drain pan with discharge to safe location. Catches small leaks before they flood the utility room. Routed to a floor drain, sump basin, or outside — never just left to catch and overflow.
T&P discharge tube. Runs from the T&P relief valve to within six inches of the floor, full pipe diameter, no reduction, no upturns. Code requirement and a basic safety item.
Gas line connection (gas units). Flexible CSST connector with a shutoff valve on the gas supply side, joint sealed and pressure-tested before being put into service. Gas leaks at the connection point are the most common gas water heater install defect.
Venting (gas units). Properly sized vent connector, correct slope, correct termination height. Wrong venting causes carbon monoxide spill back into the house.
Permit (where required). Fulton County requires a plumbing permit for water heater replacement in most cases. The permit gets you an inspection that confirms the install meets code — that's a feature, not a hassle.
Tank-style gas vs electric — what we install
Gas tank water heater install. Most Alpharetta replacements. Steps: drain old unit, disconnect gas line, drain remaining water, remove old unit, install drain pan, set new unit, connect cold supply with new shutoff valve, connect hot outlet, install expansion tank, connect gas line with new flex connector, install T&P discharge, connect vent connector, fill tank, pressure-test gas connection, light pilot, verify burner ignites correctly, verify vent draws correctly. About four hours.
Electric tank water heater install. Steps similar to gas but with a 240V circuit connection at the unit's electrical junction box instead of gas. Verify breaker is correctly sized, verify wire gauge matches breaker, fill before energizing (energizing a dry heating element burns it out instantly). About three hours.
Replacement permit pulling. Standard on jobs that require it. The inspection happens after the install. We coordinate scheduling so the inspection occurs within the county's required window. Permit fees are passed through at cost.
If your replacement is happening during an emergency (tank leak, no hot water in winter), we can sometimes get a same-day install if the unit you need is in stock. Otherwise, expect 24-48 hours from quote to install.
When to plan ahead vs replace reactively
Reactive replacement happens when the old unit fails — tank ruptures, gas valve fails irrecoverably, lower element burns out on a unit too old to justify repair. You're paying for the new unit plus whatever water damage occurred plus the inconvenience of being without hot water for a day.
Proactive replacement happens when you know the old unit is past 10 years and you'd rather schedule the work than wait for the failure. Cost is the same as reactive, minus water damage, minus inconvenience. For homes in Alpharetta's older subdivisions where the original heater is now 12+ years old, proactive replacement is usually the right call.
If you're replacing a unit that's leaking but hasn't catastrophically failed yet, treat it as urgent but not emergency — usually we can get a same-day or next-day replacement scheduled, and you avoid the 2am phone call.
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Frequently asked
How long does a water heater installation take?
Three to four hours for a straightforward replacement where the new unit is the same fuel type and similar size as the old. Longer if we're upgrading capacity, switching fuel types, relocating the unit, or running into venting or expansion-tank issues that weren't visible on the initial quote.
Do I need a permit?
In most cases yes. Fulton County requires a plumbing permit for water heater replacement. The permit fee is small and the resulting code inspection confirms the install was done correctly. We handle the paperwork.
What size should I get?
Depends on your household size and peak demand. Rough rule for tank-style: 40 gal for 1–2 people, 50 gal for 3–4, 75 gal for 5+. Households with luxury showers (multiple heads, body sprays) or multiple simultaneous baths need to size up. We size for your specific layout, not a generic chart.
Gas or electric — which lasts longer in Alpharetta?
Electric tanks typically last 2–3 years longer than gas tanks in our market because they don't have a burner assembly to corrode and don't have to vent combustion products. But the running cost of electric is higher than gas at current rates. We don't recommend switching from gas to electric on lifespan grounds alone.
Can you install a heater I bought online?
We strongly recommend against this. The big-box and online supply chains don't always carry the same warranty as units bought through professional channels. Plus, if there's an issue with the unit, you're stuck dealing with the manufacturer directly instead of having us handle it. We install units we source so the full warranty path is clean.