Polly Plumbing | 1762 Keller Pkwy, Keller, TX | (817) 286-3446. Written by Haven Brady, Co-Founder. Locally owned, not a franchise. Every water heater diagnosis on our trucks gets reviewed by a licensed master plumber. Texas License RMP-42199. Serving Keller, Southlake, North Richland Hills, Grapevine, Flower Mound, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County.
The water heater is the appliance nobody thinks about until the morning it dies. Then, standing in a cold shower or a wet garage, you suddenly need to know what a new one costs, fast. And the internet answers with numbers that swing by thousands of dollars for what sounds like the same job.
They sound like the same job because most guides only price the unit and a couple hours of labor. The real bill is built from more than that, and once you can see the pieces, a quote stops being a shock and starts making sense. The good news: a straightforward tank replacement is one of the more predictable jobs in plumbing, and most people are back to hot water the same day.
This guide breaks the install into its real line items. The difference between a simple swap and an upgrade. The code items that quietly add cost, gas versus electric, and the honest take on buying your own unit. And how to read a quote so you know what you are actually paying for. If you are weighing tank against tankless, our tankless water heater cost guide runs that decision, and our water heater replacement cost guide covers the broader picture. This one is about the install itself.
The Swap or the Upgrade: The Fork That Sets the Price
Every water heater quote starts with one question: are we replacing what you have with the same thing, or changing something?
A like-for-like swap is the friendly version and the most common. Same fuel, same tank size, same location, so the existing connections, venting, and space all still fit. The job is mostly the unit, the labor, and a few code items, and it usually wraps in a few hours with hot water back by dinner. This is the predictable end of the scale.
An upgrade or a change is where the number climbs, because the infrastructure has to change with it. Moving the heater to a new spot means new water lines, and possibly new gas or venting runs. Going up a tank size can bump other requirements. And switching fuel type, or switching to tankless, is a different project entirely, which is exactly why those quotes look so different. None of that is padding. It is the real cost of changing the system rather than replacing a piece of it.
The single most useful thing you can do before reading any quote is know which of these you are asking for, because a swap and an upgrade are not the same job wearing the same name.
The Code Items Most Quotes Do Not Explain
Here is where honest quotes and cheap quotes part ways, and it is worth understanding so you can tell them apart.
Water heater code has evolved a lot over the years, and a heater installed a decade or two ago often predates requirements that apply to a new one today. When we install a new unit, bringing it up to current code is part of doing the job right, and these items show up on the quote for a reason.
The common ones start with an expansion tank. It gives heated water somewhere to go as it expands, protecting your plumbing from pressure, and it is required in the closed systems most modern homes have. A drain pan with a proper drain line where the location calls for one, which is what stands between a future leak and your floor or ceiling. A sediment trap on the gas line, and the correct venting and connectors sized to the unit. And on a gas unit, the safety of proper combustion air and venting, which is not optional, because the failure mode there is carbon monoxide.
A quote that is dramatically cheaper than the others is sometimes cheaper because it skipped these. That is not a bargain. It is an install that will not pass inspection, or worse, one that passes on paper and leaves a safety item undone. When you compare quotes, these are the lines to look for.
Gas or Electric: What Actually Changes
Most Keller homes run gas water heaters, and if yours is gas, a gas replacement is almost always the straightforward path. But it helps to understand what the fuel type actually changes, because it is not really the unit price.
A gas unit needs proper venting to carry combustion exhaust safely out of the house, and a gas connection with a sediment trap. An electric unit needs a suitable 240-volt circuit instead. On a like-for-like replacement, gas-for-gas or electric-for-electric, none of that changes and the job stays simple. The cost jumps come from switching: going from electric to gas means adding venting and a gas line, and going from gas to electric means adding electrical capacity. Either switch is a real project, not a swap, which is why we always start by confirming what you have and what you actually want.
For most homes here, the honest answer is to replace what you have with a good version of the same thing, unless you have a specific reason to switch. The switch is rarely worth the added cost on its own.
Buying Your Own Water Heater: The Honest Take
Sometimes people find a water heater at a store and want to supply it themselves, paying us for the installation. We will do that, and quote it honestly, so here is the straight version of when it makes sense and what to watch.
It can genuinely save money on a simple swap, especially if you found a fair price on a quality unit. Labor-only pricing is smaller, and we are happy to quote it. In one June install, a homeowner supplied their own unit and we handled the installation, and it worked out fine.
Go in knowing three things, though. First, the brand and quality are now your call, and this matters more than people expect. The box-store house brands are often not the units we would choose, because parts and warranty support in year eight are what separate a good water heater from a cheap one. We would rather install a unit we trust. Second, the warranty runs through your purchase, not our supplier relationship, so registration and coverage are on you. We warranty our workmanship either way, but the tank itself is your relationship with the manufacturer. Third, the infrastructure and code work costs the same no matter who bought the tank, so owner-supplying saves on the unit and the unit only. On a simple swap that can still be a real saving. On anything involving upgrades, the savings shrink fast.
Polly Plumbing is a locally owned shop on Keller Parkway. We install water heaters, yours or ours, across Keller and Tarrant County, and every quote comes in writing with the code items itemized.
Why Keller’s Hard Water Belongs in This Decision
There is a local factor worth folding into any water heater purchase, and it changes the math on which unit to buy.
Keller’s water is hard, among the hardest in Texas per the City of Keller’s water quality reports, and that mineral load is tough on water heaters. Sediment builds faster in the tank, and the anode rod that protects against corrosion gets used up sooner. An unmaintained tank in our water tends toward the shorter end of its expected life. Two things help. Spending a little more on a better unit with a stronger warranty tier tends to pay off here, because the cheap tank ages faster in this water. And an annual tank flush to clear sediment genuinely extends the life, which our water heater lifespan guide covers. A water softener helps every appliance in the house at once, ours included, and our water softener guide for Keller TX runs that decision.
This is one more reason the cheapest unit is not always the cheapest choice. In soft water it might be fine. In ours, the better tank often outlives two cheap ones.
What It Costs, the Short Honest Version
We keep pricing in broad strokes on purpose, because the swap-versus-upgrade answer changes everything, and a real number only exists after we see the installation. What we can do is show you the shape.
A like-for-like tank swap is one of the more predictable and affordable installs there is, mostly the unit, the labor, the code items, and haul-off of the old tank. Relocating the heater, going up in size, or adding venting or gas work climbs from there. And a fuel switch or a jump to tankless is a different project on a different budget, which our tankless cost guide covers. One note on timing worth real money: a water heater that dies without warning turns into an emergency purchase, where you have no time to compare or plan. Replacing proactively as a tank nears the end of its life lets you choose calmly, which our water heater replacement cost guide gets into.
Whatever the path, our rules hold: the written quote is the invoice, the $89 dispatch fee is waived for PollyCare members, and there is no emergency surcharge even when the tank picks a holiday weekend to quit.
Permits, Inspection, and Doing It Right
A water heater replacement requires a permit and an inspection in Texas, and that is a good thing, not a hurdle.
The permit means a city inspector confirms the install meets code, which on a gas appliance is a genuine safety check, not a formality. Skipping the permit is a false economy that surfaces later. It can create problems when you sell the home, where an inspector flags an unpermitted water heater, and it can complicate an insurance claim if the unit ever fails and causes damage. We pull the permit as part of the job, the city inspects the work, and you get a written summary, the same way every Polly visit ends. That paperwork is proof the appliance heating water in your house was installed safely and correctly.
We Are Close By
Polly Plumbing installs and replaces water heaters from our shop on Keller Parkway, serving Keller, Southlake, North Richland Hills, Flower Mound, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County.
Water heater on its way out, or already gone cold? Get an honest itemized quote, ours or on your own unit. Call (817) 286-3446. Live agents answer 24/7, the code items are spelled out, and the written quote is the invoice.
Frequently Asked Questions About Water Heater Installation
How much does water heater installation cost in Keller TX?
It depends most on whether it is a swap or an upgrade. A like-for-like tank replacement, same fuel, same size, same location, is one of the more predictable and affordable installs, covering the unit, labor, current code items, and haul-off of the old tank. Relocating the heater, going up a size, or adding venting or gas work costs more, and switching fuel type or going tankless is a different project on a different budget. Because installs vary, Polly Plumbing quotes in writing after seeing the job, and the written quote is the invoice. Call (817) 286-3446.
What makes one water heater quote so much cheaper than another?
Usually what it leaves out. Honest quotes include current code items, an expansion tank, a drain pan and line where required, a gas sediment trap, and proper venting and connectors, that a dramatically cheaper quote may skip. Those are not padding; they are what makes the install pass inspection and, on a gas unit, stay safe, since the failure mode there involves carbon monoxide. A quote far below the others is often missing these lines and is not the bargain it looks like. Compare what is included, not just the bottom number. Call Polly Plumbing at (817) 286-3446.
Should I get a gas or electric water heater?
For most Keller homes, which already run gas, replacing gas with gas is the straightforward and usually cheaper path. The fuel type mainly changes the infrastructure, not the unit price: gas needs proper venting and a gas connection, while electric needs a suitable 240-volt circuit. A like-for-like replacement in either fuel stays simple. The cost jumps come from switching, which adds venting and a gas line one way, or electrical capacity the other. Unless you have a specific reason to switch, replacing what you have with a good version of the same thing is usually the honest answer. Call (817) 286-3446.
Can I buy my own water heater and have you install it?
Yes, and Polly Plumbing quotes labor-only honestly. It can save money on a simple swap if you found a fair price on a quality unit. Know three things: the brand and quality become your call, and the box-store house brands are often not what we would choose because parts and warranty support matter in year eight; the manufacturer warranty runs through your purchase and registration, though we warranty our workmanship either way; and the code and infrastructure work costs the same regardless of who bought the tank, so the savings apply to the unit only. On upgrades, those savings shrink. Call (817) 286-3446.
Do I need a permit to replace a water heater in Texas?
Yes. A water heater replacement requires a permit and inspection, which is a genuine safety check on a gas appliance rather than a formality. The permit means a city inspector confirms the install meets code. Skipping it is a false economy: an unpermitted water heater can create problems when selling the home and can complicate an insurance claim if the unit fails and causes damage. Polly Plumbing pulls the permit as part of the job, the city inspects, and you get a written summary. Call Polly Plumbing at (817) 286-3446.
Why does hard water matter when buying a water heater in Keller?
Because Keller’s hard water is tough on tanks and changes which unit to buy. The mineral load builds sediment faster, uses up the protective anode rod sooner, and pushes an unmaintained tank toward the shorter end of its life. Two things help: spending a little more on a better unit with a stronger warranty tier, which tends to pay off here because cheap tanks age fast in this water, and an annual tank flush to clear sediment. A water softener protects every appliance at once. In our water, the better tank often outlives two cheap ones. Call Polly Plumbing at (817) 286-3446.
Is it better to replace a water heater before it fails?
Almost always, yes. A tank that dies without warning becomes an emergency purchase, leaving no time to compare units, weigh gas versus electric, or plan around the code items, so you take whatever you can get fastest. Replacing proactively as a tank nears the end of its expected life, especially in our hard water where tanks age faster, lets you choose calmly and get an honest quote in advance. It turns a cold-shower scramble into a planned, predictable job. Our lifespan guide covers when that window opens. Call Polly Plumbing at (817) 286-3446.