Water heaters don't give much warning before they fail. One day the shower runs cold, or a tank starts leaking onto the garage floor, and you need someone who can get to the house quickly and do the job right. In Irmo, we've identified 7 businesses that handle water heater installation and repair, ranging from tank replacements to tankless conversions and everything in between.
What the work actually involves
Installation covers sizing the right unit for your household, disconnecting and hauling away the old tank, and bringing the new setup up to current code, which often means adding an expansion tank, updated venting, or a drain pan depending on where the unit sits. Repair work is usually diagnosing why a tank isn't heating, isn't holding pressure, or is leaking from a fitting or the tank shell itself. A good technician will tell you honestly when a repair makes sense versus when replacement is the smarter money.
What to check before you hire
Ask whether the plumber is licensed in South Carolina, carries liability insurance, and pulls permits for water heater swaps (many municipalities require it). Get a clear quote that separates labor, unit cost, and any code-related upgrades, and ask about warranty terms on both the equipment and the installation labor. Same-day or next-day availability matters if you're dealing with a leak.
How we score these businesses
Our rankings weigh licensing, insurance, response time, review consistency, and how transparent each company is about pricing. You can see the full breakdown in our methodology, and the complete ranked list is on our best plumbers in Irmo guide.
