How Much Does a Well Pressure Tank Replacement Cost? [2025 Data]
Replacing a well pressure tank costs $500 on average, but it can cost between $300 and $700, depending on the tank's size, capacity, and labor costs for professional installation.
Well tank replacement costs hover around $500 but vary from $300 to $700 based on the tank type, size, and location. In some cases, costs go up to $2,500 for large or difficult-to-reach tanks. Expect to pay $10 to $15 per gallon when choosing a tank size.
A well pressure tank does a lot more than simply hold water for when you need it. It’s also responsible for holding pressurized air so you can actively pump well water into your home when it's time to wash dishes or take a shower. Below are the cost considerations you need to know as you plan this project.
How Much Does a New Well Pressure Tank Cost by Type?
A key factor when choosing a well pressure tank is determining the type of compartments you want. Most well pressure tanks use two compartments to separate the water from the compressed air, but there are options where they combine together.
| Well Pressure Tank Type | Average Cost |
|---|---|
| Diaphragm | $200–$2,500 |
| Bladder | $150–$1,500 |
| One-compartment | $100–$300 |
Diaphragm Well Pressure Tank
Diaphragm well tanks are a relatively common type of tank because of their efficiency. Diaphragm pressure tanks utilize an internal membrane (also called a bladder) to separate the water on the top from the air on the bottom. This membrane is welded shut, preventing any air from escaping.
Most individuals pay around $200 to $500 for a new diaphragm well pressure tank, but the cost can be upward of $2,500 for large well pressure tank sizes (such as 120 gallons) and if you switch out vinyl materials for all metal.
Bladder Well Pressure Tank
Bladder well pressure tanks are nearly identical to diaphragm pressure tanks, except the bladder inside has screws holding it in place rather than being welded in. This leads to an easier-to-replace inner mechanism but at the cost of potentially losing efficiency when air escapes.
Because of their slight downgrade in performance, expect to pay around $150 to $400 for a bladder well pressure tank. These tanks can reach upward of $1,500 for larger sizes.
One-Compartment Well Pressure Tanks
Unlike diaphragm and bladder well pressure tanks, one-compartment well pressure tanks don’t separate the water from the air. While this eliminates a point of failure within the well pressure tank system, it does increase the chance of waterlogging. Waterlogging happens when too much water and air mix in the tank, diluting each other.
One-compartment well pressure tanks cost $100 to $300 on average.
Well Pressure Tank Cost Factors
Beyond the type of tank, you’ll want to consider the capacity. You’ll also need to pay someone to hook up the pressure tank.
| Well Pressure Tank Cost Factors | Average Cost |
|---|---|
| Capacity | $10–$15 per gallon |
| Labor | $125–$200 |
| Well pump replacement | $1,900 |
Capacity
Well pressure tanks are measured in the number of gallons of water they can hold. The smallest well tank is a 20-gallon option, with the largest ones reaching 120 gallons. Depending on the brand and type of pressure tank, you'll pay anywhere from $10 to $15 per gallon.
Labor
You’ll need to hire a handyperson or local plumber to tackle this job. A plumber's cost to replace a well tank ranges from $125 to $200. However, they may charge more if your pressure tank is in a hard-to-reach area.
Other Repairs
A well pressure tank is one part of a well pump system. If there are any other problems, such as the pump failing, there are extra costs you’ll need to tack on. The average cost of replacing a well pump is around $1,900.
"Get your well water sampled at a lab every year. You always want to know what is in your water and how good it is."
— Constantin Geambasu, Owner of Water Rehab, Gilbert, Arizona
Location
Two types of location issues can increase the cost of replacing the well pressure tank. First, it costs more to replace a tank in areas with a higher cost of living. Expect labor costs, the cost of the tank, and additional hardware to fall on the higher end of the cost range.
Second, labor costs may also be higher if the tank’s location is difficult to access. Accessibility issues may increase the hourly rate or cause the project to take longer, increasing the final cost.
DIY vs. Hiring a Pro
Replacing a well pressure tank is not a job for the average DIYer. Unless you actually have years of experience in wells and tanks, you should leave this one to a pro. These tanks can be heavy, and the pros know how to move them into place safely without causing injury. Plus, a small misstep here could compromise the water quality of your entire home.
Contact a well pump repair pro near you to install a new well pressure tank. Having the tank installed safely and correctly is worth the investment.
How to Save Money When Installing a New Well Pressure Tank
To save a few pennies down the road, use these tips:
Opt for a larger well pressure tank than your current one. This will cut down on the cost per gallon. Plus, you may not need to replace it as often.
Prioritize good warranties when shopping for a tank. This protects you against having to pay for a costly pressure tank twice in a short amount of time.
Hire a professional for installation. Trying to DIY this job without experience can lead to a lot of costly mistakes. Don’t overestimate your abilities. This is a very detail-oriented job.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We extensively research project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We rely on reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to costquotes@angi.com. Quotes and personal information will not be shared publicly.
Frequently Asked Questions
A well pressure tank is located between the well and the well pump, and it stores your water under pressure so that the well pump can eventually do its job. The well pump is activated whenever you turn a faucet on—it pulls the water from the tank into your home. Both are vital parts of a complete well water system.
Well-maintained well pressure tanks last seven to 10 years. You can improve the tank’s lifespan by buying a quality tank large enough for your needs. If properly maintained, with minor repairs and leaks fixed promptly, you can extend the life to fifteen or more years.
Remember that water containing a lot of minerals or sediment can prematurely erode the pressure tank. Water quality issues may mean repairing or replacing the pressure tank more often.
A larger well pressure tank will not increase water pressure throughout the home. The pressure control on the well pump is in charge of the pressure. A larger well pressure tank will allow you to run the water for longer, as there’s more air and water to supply before running out.
