Well-X-Trol Tank

The Amtrol Well-X-Trol WX-350 is one of the largest tanks in the Well-X-Trol residential and light-commercial lineup, offering a commanding 119-gallon capacity in a twenty-six-inch diameter by sixty-two-inch tall vertical body. It is built for water systems with the highest demand, where a massive reserve of pressurized water is needed to keep the pump cycling minimally and the pressure rock-steady. When a single tank has to carry an entire estate or operation, this is the size that gets the job done.

With 119 gallons on tap, the WX-350 delivers exceptional drawdown, the usable volume a tank supplies between pump cycles. Greater drawdown means fewer pump starts, and fewer starts translate directly into a longer pump life, since the surge of current and mechanical strain at each start-up is the primary cause of motor failure. This large tank lets a single pump comfortably serve large estates, agricultural operations, and multi-fixture buildings without ever falling into the damaging pattern of short-cycling.

Best-fit applications

• Large homes and estates with heavy, simultaneous water use
• Irrigation, agricultural, and livestock watering systems
• Light-commercial and multi-unit installations
• Constant-pressure and booster pump systems requiring a deep reserve
• Any well system prioritizing maximum pump protection and runtime
• Replacements for undersized tanks that cycle too aggressively

Every Well-X-Trol relies on a durable, pre-pressurized diaphragm that keeps the stored water completely separate from the sealed air charge. This proven design preserves the factory pre-charge, guards against waterlogging, and helps keep the stored water clean throughout a long service life. When installing the WX-350, match the air pre-charge to your pump's cut-in pressure and recheck it periodically with the system drained and depressurized. The tall sixty-two-inch profile packs enormous capacity into a sensible footprint for utility rooms and pump houses. As the flagship-size offering in Amtrol's trusted Well-X-Trol family, the WX-350 brings unmatched capacity and dependable, low-maintenance performance to the most demanding well water systems. At 119 gallons, it is the tank to specify when nothing smaller will keep up, whether the load comes from a sprawling residence, a working farm, or a multi-fixture commercial setting. Properly charged and matched to the pump, it delivers the deep reserve and gentle cycling that protect equipment and keep pressure steady through even the heaviest sustained demand.