Well-X-Trol Tank In-Line Tank

The Amtrol Well-X-Trol WX-101 is a compact in-line pressure tank built for private well systems and other applications where space is at a premium. Measuring eight inches in diameter by eleven inches tall with a two-gallon volume, this small-footprint tank installs neatly along the plumbing line and helps a well pump deliver steady, even water pressure throughout the home. Its lightweight five-pound construction makes it one of the easiest pressure tanks to mount in tight quarters.

Well-X-Trol pioneered the pre-pressurized diaphragm tank, and that design remains the standard for protecting pumps and stabilizing system pressure. A sealed air charge on one side of the internal diaphragm keeps water separated from the air cushion, so the tank stores water under pressure and releases it on demand. This drawdown reduces how often the pump must cycle on and off, which directly extends pump motor life and smooths out the pressure fluctuations you would otherwise feel at the tap.

Where the WX-101 fits

• Small or supplemental well water systems needing reliable pressure support
• Booster pumps, irrigation lines, and point-of-use installations
• Reverse osmosis and filtration setups requiring a compact buffer tank
• Retrofit jobs where a full-size tank simply will not fit
• Light-duty residential and light-commercial pressure applications
• Crawl spaces, pump houses, and mechanical rooms with limited clearance

Because the water never contacts the air charge directly, the diaphragm design helps preserve the factory pre-charge and keeps the stored water clean and free of the waterlogging that shortens the life of older-style tanks. The inline orientation is ideal for compact installations, letting the tank sit right in the run of pipe rather than demanding dedicated floor space. As with any pressure tank, you should periodically check the air pre-charge with the system depressurized and confirm it matches your pump's cut-in pressure for optimal performance. Backed by the trusted Amtrol Well-X-Trol name, the WX-101 is a dependable choice for adding pressure stability and pump protection to smaller water systems without sacrificing valuable space. Many installers reach for a compact tank like this when a primary tank needs supplemental drawdown, or when a dedicated buffer is wanted ahead of a filter or treatment appliance. In every case, the goal is the same: fewer pump starts, gentler operation, and water pressure that stays comfortable and consistent from the first fixture to the last.