WSP Pressure Tank - Well Water, PT-AMTRO-5

This is a large pre-pressurized pressure tank designed to smooth out well pump cycling and stabilize water pressure in residential water systems. With a 119-gallon capacity, it helps reduce pump starts and pressure swings for homes with high water demand.

The daily grind of scrubbing doesn’t ease when water pressure jumps and stops

Every time you turn on a tap or flush a toilet, you might notice the pump kicking on and off frequently. That rapid cycling means pressure in your pipes wobbles as water surges then drops, leaving you to deal with unpredictable flow. You might find yourself scrubbing the shower door to clear rings left by fluctuating pressure or wiping down faucets where splashes land unevenly. Over time, this pressure rollercoaster can leave your fixtures feeling less steady and add to the cleaning workload without any real payoff in comfort.

How the control head keeps water pressure steady and pump runs gentle

At the top of the tank is a specialized air-draw control head. This head pulls in a pocket of air inside the tank to cushion and balance the water pressure without needing chemicals. When the pump fills the tank, the air pocket compresses, holding pressure steady. As water flows out, the pocket expands, providing a smooth and reliable pressure supply. This means the pump doesn’t have to start and stop constantly but operates in longer, less frequent runs, reducing wear.

Why this tank’s diaphragm media is key to consistent pressure

Inside the tank, a pre-pressurized diaphragm keeps water and air separated. This diaphragm flexes as water enters or leaves, maintaining a constant air cushion on the opposite side. The design prevents waterlogging — when air dissolves into the water and the tank loses its buffering power — which is a common cause of unstable pressure. The diaphragm ensures the tank can always deliver reliable pressure without frequent maintenance.

A 119-gallon tank built to handle large home water demands

This tank offers a substantial 119-gallon volume, meaning it holds a large reserve of pressurized water ready to flow when you need it. The significant storage reduces how often your pump cycles on and off, which cuts down motor strain and potential failure. Its size and design suit homes with multiple bathrooms or higher simultaneous water use, supporting steady water pressure even under heavy demand.

Fits homes with strong water needs, but check if it matches your system

This pressure tank is designed for residential systems with large flow requirements—think bigger homes or properties using water heavily at the same time. If your household’s water use is modest, a smaller tank might suit you better and be more cost-effective. On the other hand, if your home or water system draws heavily or includes irrigation or multiple fixtures, this size can help keep pressure steady and extend your pump’s life.

What you get with your WSP Pressure Tank

Included is the large, durable 119-gallon pre-pressurized tank equipped with the chemical-free air-draw control head and diaphragm media inside. The tank itself carries a lifetime warranty for the pressure vessel, offering long-term peace of mind. The control valve and any electronics have their own manufacturer warranties. Shipping within the U.S. is free and included in the purchase price.

Taking the next step

If you’re ready to reduce pump cycling, smooth out water pressure, and cut down the wear on your well system, you can order this WSP Pressure Tank online today. Our team is available to help confirm sizing based on your water use and system setup. Shipping is fast and free from Tampa, Florida, and your tank will arrive ready to connect with your local licensed plumber’s installation.

Who this size is right for

In terms of sizing, this is a vessel rather than a complete system, so it is sized to the system it joins and to the flow the house draws - normally a single-family home.

There is no published capacity figure for this item, so we size it from your water rather than from a table. Send your peak flow rate and a water test and we will confirm what you need - it costs nothing and it avoids buying twice.