A well pump pressure tank is an integral part of any well water system. It provides pressurized water storage, reducing the need for the pump to switch on and off each time water is used – thereby prolonging the pump’s life and providing instant access to water. However, with various types and sizes of well pump pressure tanks available, choosing the right one can be quite a task. This comprehensive guide will help you shop for the perfect well pump pressure tank for your needs.
Understanding the Role of Well Pump Pressure Tanks
Before we dive into the selection process, it’s crucial to understand how pressure tanks work and their role in a well water system. A pressure tank stores water that’s been pumped from the well and keeps it under pressure. When you turn on a faucet, water is pushed out by the air pressure in the tank. As the water level in the tank decreases, the pump kicks in, refills the tank, and builds up pressure again.
Types of Pressure Tanks
There are three main types of pressure tanks: diaphragm, bladder, and galvanized. Each type has its own advantages and disadvantages.
1. Diaphragm Tanks
These tanks have a diaphragm that separates the water and air chambers. They are pre-charged with air and don’t allow the water and air to mix, reducing the chance of waterlogging.
2. Bladder Tanks
In bladder tanks, the water is stored in a bladder or bag, with air surrounding it. These tanks offer excellent separation of air and water, which prevents waterlogging and ensures consistent water pressure.
3. Galvanized Tanks
Galvanized tanks are the oldest type and consist of a single chamber filled with water and air. Over time, the air can dissolve into the water, causing the tank to become waterlogged. These tanks often require a separate air-volume control system.
Factors to Consider When Shopping for Pressure Tanks
The size of the tank you need depends on the output of your well pump (measured in gallons per minute, GPM) and the nature of your water use. As a rule of thumb, for pumps with an output of up to 10 GPM, a tank with a 1-2-gallon drawdown is suitable. For pumps producing over 10 GPM, a larger tank is required.
Consider a tank made from sturdy, corrosion-resistant materials. Stainless steel and fiberglass are excellent options. A tank with a durable liner will resist damage from water and minerals.
3. Pre-Charge Pressure
Ensure that the pre-charge pressure of the tank is compatible with your pump cut-in pressure. It should typically be 2 psi lower than the pump cut-in pressure.
Opt for a pressure tank with a good warranty. A quality pressure tank should last many years, and a manufacturer’s warranty is often a good indicator of durability.
Choosing the right pressure tank for your well water system will provide consistent water pressure, reduce wear on your well pump, and improve the efficiency of your water system. For more personalized advice on selecting the perfect well pump pressure tank, The Pump House is here to help. We’re your one-stop-shop for all your pump needs – contact us here.