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What Is a Well Pressure Tank?
June 04,2025

Do you have a private well on your property? If so, installing an electric pump is crucial to draw water from the well and send it to all the fixtures in your home at the desired pressure. If you experience inconsistent performance by your well pump, it may be time to for an upgrade. At Mr. Rooter Plumbing, we can have a plumber in South Jersey area at your door in no time, ensuring accurate diagnosis and long-lasting solutions. A well pressure tank stores many gallons of under pressure, ensuring consistent water pressure even when the pump is turned off. Additionally, a well pressure tank reduces the stress and initial surge during the startup process, extending your system's lifespan.

How Does a Pressure Tank Work?

Whether you have an onsite well or looking to purchase a property with a natural water source, understanding how the pressure tank works is crucial. The pressure tank contains a large volume of air and the inlet that allows water into the bottom of the tank. Since fluids are not compressed, the water entering the tank pressurizes the air until the pump shuts off. This ensures you have access to consistent water pressure throughout your plumbing.

Once the air pressure in the tank drops below 30 psi, the pump automatically activates to refill the tank and supply fixtures. If your system malfunctions or fails to supply water pressure, consult a plumbing repair service to inspect, diagnose, and restore functionality.

Types of Pressure Tanks

Now that you know how a well-pressure tank works, let’s delve into the different types to help you make informed decisions.

Air-Over-Water Tanks

The most common well pressure tank is the air-over-water system. This tank features a chamber that allows lighter air to naturally rise to the top and compress it as water fills the bottom of the tank. The pressurized air can dissolve in water, requiring regular inspections and refills. Some models feature a float or a wafer between the air and water to minimize this problem.

Diaphragm Tanks

A diaphragm tank features a vinyl or rubber circular diaphragm that divides the water and air into individual components. As water enters the tank, it expands the diaphragm upwards, compressing the air. Before installing a diaphragm system, consult a professional plumber to ensure it is the best option for your needs.

Bladder Tanks

Lastly, the bladder tank features a balloon-like bladder that holds water and is surrounded by air which occupies the remaining volume. As water enters the bladder and expands, the air in the tank is compressed, ensuring adequate water pressure throughout your home. As water is dispersed to different fixtures, the air pressure reduces, allowing the bladder back to its original size.

Technological advancements over the years have impacted well pressure tanks immensely, allowing manufacturers to design different capacity systems. With that in mind, hiring a plumbing repair service is crucial to ensure you install a pressure tank that holds the right amount of water for your needs.

After a successful installation, professional technicians will schedule regular inspections to ensure proper air pressure, which is usually slightly lower than the low-pressure setting of your pump. If you experience inconsistent water pressure, frequent cycling, tank leaks, or water from the air valve, reach out to a trusted plumber to fix the problem and avoid disruptions to your routine.

Professional Well Water Tank Service

Well pressure tanks play a crucial role in ensuring a reliable water supply throughout your building. If you suspect a problem with your system, contact Mr. Rooter Plumbing and schedule a consultation with our experts. We have many years of experience serving residential and commercial, providing quality water testing and treatment, and well water services.