Water Heater Installation: What to Expect and How to Prepare

Thinking about a new water heater? Maybe your old one’s leaking, or you’re tired of cold showers cutting your mornings short. The good news: a fresh installation can turn things around fast. But the process can feel like a maze, especially if you’ve never replaced a major appliance before.

At Miller Legacy Plumbing, we navigate this maze every day for families just like yours. Our certified installers know code like the back of their hand, and safety is always our North Star. Here’s what to expect, how to prepare, and tips for enjoying reliable hot water—with no surprises.

Choosing the Right Water Heater 🔥

Picking a water heater isn’t like grabbing milk at the store. There are choices. Big ones. The right decision can save money, energy, and headaches for years. Here’s what to consider:

Tank vs. Tankless

• Tank Water Heaters: The classic. Like a hot water thermos always ready to pour. They store and heat a set amount of water—usually 30 to 80 gallons. Good for steady, predictable needs.
• Tankless Water Heaters: Hot water on demand. Imagine a long hike, and every time you reach for your canteen, it magically refills. These units heat water as you use it. They save space and can lower energy bills, but may have higher up-front costs.

Fuel Source

• Gas: Heats quickly and can work even during power outages. Needs proper venting and safety checks.
• Electric: Simple to install. No venting required. May cost more to run, depending on local rates.

Venting Requirements

Gas water heaters must vent exhaust safely outside. Options include direct vent, power vent, or atmospheric vent. The right choice depends on your home’s layout and local building code.

Permits & Codes

Most cities require permits for water heater installation. These aren’t just paperwork—they’re for your safety. Installers must follow rules from the National Fuel Gas Code (NFPA 54), local plumbing codes, and manufacturer instructions. At Miller Legacy Plumbing, we pull permits, handle inspections, and ensure your system is up to code—every time.

Disposal of Old Units

Old water heaters are heavy, awkward, and can leak rusty water. We remove and responsibly dispose of your old unit, following local recycling rules.

Local Rebates & Energy Incentives

Some areas offer rebates for upgrading to high-efficiency water heaters. Check with your local utility or the ENERGY STAR program to see if you qualify. We’re always happy to point you in the right direction.

What Happens During Installation 🛠️

A water heater swap isn’t just plug and play. It’s more like a well-choreographed dance—each step matters.

Arrival and Assessment

Our certified installer arrives and does a quick review—checking your current heater, water shutoffs, gas/electric lines, and venting. We confirm the new unit will fit and meets all requirements.

Shutoff and Drain

We turn off water and power (or gas) to the old unit. Then, the tank is drained. This can take 20–45 minutes, depending on size.

Removal

The old heater is carefully disconnected and hauled out. Sometimes, sediment or rust can spill, so we protect nearby floors.

Installation

• Positioning: The new heater is placed and leveled.
• Connections: Water lines, gas or electric hookups, and venting are connected. All joints are sealed and pressure-tested.
• Code Compliance: We double-check everything meets local plumbing and safety codes.
• Permit Review: If required, a local inspector may stop by for a final thumbs-up.

Testing

We fill the tank, purge air from the lines, and fire it up. Hot water flows again! The installer checks for leaks, proper venting, and safe operation before leaving.

Clean-Up

All debris is removed, and the area is left tidy. You’ll get a quick walkthrough of your new system, plus any paperwork you need for warranties or rebates.

How to Prepare Your Home 🧹

A little prep goes a long way. Here’s how to make installation day smoother:

• Clear the Area: Move boxes, laundry baskets, or anything blocking the heater. Our team needs about 3 feet of workspace.
• Pets & Kids: Keep curious paws and hands away from the work zone for safety.
• Plan for Water Shutoff: Expect water to be off for 1–3 hours. Fill some pitchers or buckets for handwashing or drinking.
• Pathways: If your heater is in a basement or tight spot, clear a path for easy in-and-out.

If you have questions or special concerns—just ask. We’re here to help.

After-Install Maintenance 🧰

Your new water heater is in. Now what? Like any big investment, it needs a little attention to run strong for years.

Annual Checkups

Schedule a yearly inspection. A pro can spot leaks, corrosion, or venting issues before they become big problems. Regular checkups can also keep warranties valid.

Flushing the Tank

Sediment can build up inside tank heaters, reducing efficiency and shortening lifespan. Most manufacturers (like AO Smith and Rheem) recommend flushing the tank once a year. For tankless units, annual descaling is key, especially if you have hard water.

Test the Pressure Relief Valve

This small part does a big job—preventing dangerous pressure buildup. Lift the test lever yearly to make sure it’s working, or have your plumber check it during an inspection.

Keep the Area Clear

Don’t store paint cans, boxes, or cleaning chemicals near your heater. Good air flow is important, especially for gas units.

Watch for Warning Signs

• Water pooling around the base
• Strange noises (popping, banging)
• Rusty water
• Drop in hot water supply

Spot something odd? Call for help right away. Emergency plumbing is what we do.

FAQs ❓

How long does water heater installation take?

Most jobs take 2–4 hours, start to finish. If new venting or major plumbing changes are needed, it can take longer.

Do I need to be home during installation?

Yes, someone 18 or older should be home. We’ll need access to the heater, shutoffs, and sometimes the electrical panel.

What if my home isn’t up to current code?

No worries. We’ll let you know what needs to be updated and explain your options. Safety and compliance come first.

Can I install a water heater myself?

It’s possible—but risky. Mistakes can lead to leaks, carbon monoxide, or even house fires. Local code often requires a licensed plumber for installation, especially for gas units.

Local and Seasonal Considerations 🌦️

Water heater trouble seems to strike at the worst times—holidays, cold snaps, or just as guests arrive. In colder months, pipes can freeze and put extra strain on your system. If your heater is over 10 years old or showing signs of rust, don’t wait for winter to make a move.

Some regions may require earthquake straps or specific venting for safety. Always ask your installer about local rules and seasonal tips.

Ready for Reliable Hot Water?

A new water heater isn’t just a luxury—it’s comfort, safety, and peace of mind for your home. Whether you need emergency plumbing or a scheduled upgrade, Miller Legacy Plumbing is ready when you are.

Call Miller Legacy Plumbing now — or reach us anytime at  888-859-6692 .