Award Winner and Licensed Master Plumber - 26 Years of Experience, Bonded & Insured

Water Heater Installation and Replacement, Express Plumbing

Water Heater Installation & Replacement - Get Hot Water Back Today

No hot water? Water heater leaking? Express Plumbing installs and replaces gas and electric water heaters across Lake Saint Louis, Wentzville, O'Fallon, and St Charles County. Same-day installation available. Licensed master plumber with 26 years experience. Call (314) 807-8460 — most installs done in half a day.

Water Heater Installation and Replacement

Most water heaters last 10–15 years before they start giving out. If yours is in that range and you're having problems, replacement is usually the better move than trying to patch it. The most obvious sign is when your shower runs cold or you're running out of hot water way faster than you used to. That means the heating element is failing or the tank's full of sediment. If you hear banging or popping sounds from the tank, that's sediment buildup — it happens over time and eventually the unit can't heat properly.

A leaking water heater is a different problem. If you've got water pooling around the base of the tank, that's not something you can fix. The tank itself is failing and it needs replaced before it floods your basement or garage. Rusty water coming out of your hot water taps means the inside of the tank is corroding. Once that starts, it's only a matter of time before the tank leaks. If your water heater is over 10 years old and you're seeing any of these signs, call us at (314) 807-8460. We'll take a look and tell you honestly whether it's worth repairing or if you need a new one. Most of the time, if it's old and failing, replacement is the smarter choice.

WHY HOMEOWNERS CHOOSE Express Plumbing for Water Heater Installation and Replacement

Same-Day Water Heater Installation Available

Most water heater installs take about half a day — usually three to five hours from start to finish. If you call us in the morning, there's a good chance you'll have hot water by dinner. We keep standard 40-gallon and 50-gallon units in stock for the most common residential setups. If you need something bigger or something specific, we can usually get it same-day or next-day. We're not making you wait a week for an install. When your water heater quits, you need it fixed now. We haul off your old unit when we're done so you don't have to figure out how to get rid of a 50-gallon tank.

We Install to Code and Pass Inspection Every Time

Jim's a licensed master plumber in St Charles County, St Louis County, and the City of St Louis. We pull permits when they're required and our installations pass inspection the first time. That matters because water heater installs have to meet code — proper venting for gas units, right electrical setup for electric units, correct pressure relief valve placement, proper clearances. If it's not done right, you can fail inspection and you're paying someone else to come fix it. We've installed hundreds of water heaters across Lake Saint Louis, Wentzville, O'Fallon, St Peters, and beyond. We know what passes and we do it right the first time.

Free Estimates and Honest Recommendations

We don't charge you to come out and look at your water heater. Call us at (314) 807-8460, we'll come take a look, and we'll tell you what you need. If it's fixable and makes sense to repair, we'll tell you that. If it needs replaced, we'll recommend the right size and type for your house and give you a price before we start. No pressure. No upselling you on a bigger unit than you need. Most homes do fine with a 40-gallon or 50-gallon tank depending on how many people live there and how much hot water you use. We'll walk you through it.

26 Years of Water Heater Installations

We've been installing water heaters since 1999. That's over two decades of gas installs, electric installs, tankless systems, and every type of water heater you can imagine. We've worked in old homes where we're replacing a unit that's been there since the 80s. We've worked in new construction where we're installing the first one. We know how to deal with tight spaces, outdated venting, electrical panels that need upgraded, and all the other issues that come up during installs. Experience matters when you're installing something that's going to be in your house for the next 10–15 years.

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Our Simple 3-STEP Water Heater Installation and Replacement PROCESS

1

We Assess Your Current Setup and Recommend the Right Unit

When you call (314) 807-8460, we'll ask about your current water heater — gas or electric, what size, how old, what's wrong with it. We come out, look at the setup, and recommend what you need. If you're replacing a 40-gallon gas unit, we'll probably recommend another 40-gallon gas unit unless your needs have changed. We'll give you a price for the unit and the install before we start any work.

2

We Install the New Water Heater to Code

Most installs take three to five hours. We shut off the water and gas or electric to the old unit, drain it, disconnect it, and haul it out. Then we bring in the new unit, set it in place, connect the water lines, connect the gas line or electrical, install the pressure relief valve, and make sure the venting is correct for gas units. We test everything before we're done. If permits are required, we pull them and schedule the inspection.

3

We Test It and Show You How It Works

Once it's installed, we fire it up and make sure it's heating properly. We check for leaks, we make sure the pressure relief valve is working, and we verify that hot water is flowing to your taps. We'll show you where the shut-off valves are, how to adjust the temperature if you need to, and what to watch for going forward. Most water heaters are set to 120 degrees from the factory, which is fine for most homes.

Ready to get started?

Leaky pipe? No hot water? Toilet won't stop running?

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Emergency Plumbing Repairs done by Express Plumbing

Frequently Asked Questions

Got Questions? We’ve Got Answers!

How long does it take to install a water heater?

Most water heater installs take about half a day — usually three to five hours from start to finish. If we're swapping a gas unit for another gas unit in the same spot, it's pretty straightforward. If we need to run a new gas line, upgrade electrical, or change the venting setup, it might take longer. We'll tell you upfront what to expect.

How much does water heater installation cost?

It depends on the type and size. A standard 40-gallon or 50-gallon gas water heater with installation usually runs $1,200–$1,800. Electric units are similar, maybe a bit less. Tankless water heaters cost more — usually $2,500–$4,000 installed because they require more work. We give free estimates so you'll know the price before we start.

What size water heater do I need for my house?

Most homes do fine with a 40-gallon or 50-gallon tank. If it's just you or two people, a 40-gallon is plenty. If you've got a family of four or more, a 50-gallon makes more sense. If you're running out of hot water constantly, you might need to go bigger. We'll recommend the right size based on how many people live in your house and your hot water usage.

Should I get a gas or electric water heater?

If your house already has a gas line and your current water heater is gas, stick with gas. Gas heaters heat water faster and cost less to run. If your house is all-electric, then electric is the way to go. Electric heaters are simpler to install because there's no venting required, but they cost more to operate and they heat slower. We'll walk you through what makes sense for your setup.

Do I need a permit to replace a water heater?

It depends on where you are. Some jurisdictions require permits for water heater replacements, some don't. We know which areas require permits and we'll pull them when needed. Our work passes inspection the first time because we install to code. You don't have to worry about dealing with inspectors or paperwork — we handle it.