How big is a well pressure tank?#
A well pressure tank is a cylinder 15 to 26 inches in diameter and 24 to 60 inches tall, sized to the well's flow. The table below sorts the small, standard, and large tanks.
Well pressure tank dimensions by configuration#
| Configuration | Diameter (in) | Height (in) | Depth (in) | Best for |
|---|---|---|---|---|
| Small well pressure tank | 15–16 | 24–32 | 15–16 | a small home or a low-draw well |
| Standard well pressure tank | 16–22 | 40–50 | 16–22 | the most common household well |
| Large well pressure tank | 22–26 | 50–60 | 22–26 | a large home or a high-flow well |
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Installation clearances for a well pressure tank#
- Overhead clearance: 6–12 in in above a well pressure tank to reach the air valve and the tank tee.
- Side clearance: 6–12 in in beside a well pressure tank for the pressure switch, gauge, and pipe fittings.
- Tank tee: A well pressure tank connects to the pump line through a tank tee that carries the switch, gauge, and drain.
- Level base: A well pressure tank stands on a level pad or feet so its weight when full does not stress the plumbing.
Will your well pressure tank fit? Clearances and door swing#
A pressure tank is a standing cylinder, so plan its diameter, height, and room to reach the fittings. Leave 6 to 12 inches above the tank to get at the air valve on top and the tank tee, and the same 6 to 12 inches to the side for the pressure switch, gauge, and pipe connections. The tank ties into the pump line through a tank tee that carries the switch, the gauge, and a drain, so that assembly needs to stay accessible for service and adjustment. Set the tank on a level pad or its feet so its considerable weight when full does not hang on the plumbing. A standard tank at 40 to 50 inches tall needs a bit of headroom in a utility room or well house. Measure the diameter and height against the space before choosing a size.
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Well pressure tank sizes by type: small well pressure tank, standard well pressure tank, large well pressure tank#
The three sizes track the well and household demand. The small tank, 15 to 16 inches in diameter and 24 to 32 tall, suits a small home or a low-draw well and fits a tight utility corner. The standard tank widens to 16 to 22 inches and stands 40 to 50 tall — the common household size that balances draw-down against footprint. The large tank, 22 to 26 inches across and 50 to 60 tall, serves a big home or a high-flow well, storing more water so the pump cycles less often. Match the tank to your well's flow and the home's demand, then confirm the height clears the space.
Well pressure tank dimensions: common questions#
How tall is a well pressure tank?#
A well pressure tank stands 24 to 60 inches tall depending on size. A small tank is 24 to 32 inches, a standard one 40 to 50, and a large tank 50 to 60.
How wide is a well pressure tank?#
The tank is 15 to 26 inches in diameter. Small tanks are slimmest at 15 to 16 inches, while large tanks reach 22 to 26 across.
What size well pressure tank do I need?#
Match it to your well's flow and household demand. A small tank suits a low-draw well, a standard tank fits most homes, and a large tank lets the pump cycle less in a high-demand house.
How much clearance does a pressure tank need?#
Leave 6 to 12 inches above and to the side to reach the air valve, tank tee, pressure switch, and gauge. That access is needed to check and adjust the system.
How deep is a well pressure tank?#
Being a cylinder, its depth equals its diameter, 15 to 26 inches. A large tank takes the most floor space at 22 to 26 inches across.
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