Best Shallow Well Pressure Tanks for Reliable Water Pressure
The best shallow well pressure tank depends on your pump system, available space, and water-use needs. The Red Lion 6-gallon model is best for compact horizontal installations, while its 20-gallon tank suits buyers who need more capacity from a drinking-water-certified tank. VEVOR’s 20- and 34-gallon models offer larger vertical options, but their listings state they are not suitable for drinking water. The Red Lion 4-gallon in-line tank is best for small systems or pressure boosting.
| Tank | Best For | Capacity | Orientation |
|---|---|---|---|
| Red Lion 6AH | Compact setups | 6 gallons | Horizontal |
| Red Lion RL20A | Certified well-water systems | 20 gallons | Vertical |
| VEVOR 20-Gallon | Non-potable water systems | 20 gallons | Vertical |
| VEVOR 34-Gallon | Higher-capacity storage | 34 gallons | Vertical |
| Red Lion RL4A | Small boosting systems | 4 gallons | In-line |
Red Lion 6AH Horizontal Pressure Tank
Best for: Homeowners who need a compact, horizontal tank for a well-pump system. Its 6-gallon capacity can suit an installation where a larger vertical tank will not fit, though tank capacity should match the pump and household demand.
The tank is designed to maintain water pressure while the pump is off. It has a heavy-duty 20-gauge steel body, a 304 stainless steel water connection, a butyl rubber diaphragm, and a propylene liner. The listing identifies it as certified for drinking water under NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372.
Setup note: It ships pre-charged to 20 PSI for transportation. The air charge must be adjusted to 2 PSI below the pressure-switch cut-in setting. Its small capacity may be limiting for higher-demand systems.
Red Lion RL20A Vertical Pressure Tank
Best for: Well owners seeking a 20-gallon vertical tank with listed drinking-water certifications. This model is a better fit than a small tank when the system needs more stored pressure capacity, provided the installation has room for its vertical footprint.
Features include a 20-gauge steel tank, 304 stainless steel water connection, butyl rubber diaphragm, and propylene liner. The product is designed to maintain pressure while the well pump is not running. Its listing specifies NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372 certification for drinking-water use.
Setup note: The transport pre-charge is 20 PSI, and the air pressure should be set 2 PSI below the pressure-switch cut-in. Confirm the required tank size and switch setting for the specific pump system before installation.
VEVOR 20-Gallon Vertical Well Tank
Best for: Buyers who need a 20-gallon vertical tank for a non-potable well, farm, or irrigation system. Its listed dimensions are 15.35 by 15.35 by 32.1 inches, useful when checking floor space and height clearance before purchase.
The tank uses 1.2 mm thickened carbon steel and has a 1-inch NPT connector. The listing specifies a 2 BAR (29 PSI) pre-charge, a maximum internal pressure of 6 BAR (87 PSI), and a maximum working temperature of 90°C (194°F). It is presented as a way to reduce pump start-stop frequency and support smoother flow.
Important limitation: The product listing says it is not suitable for drinking water and is not frost-proof. Do not select it for potable-water service or an installation exposed to freezing conditions.
VEVOR 34-Gallon Vertical Well Tank
Best for: Non-potable systems that need more tank capacity for household supply, farm use, or irrigation. Compared with the VEVOR 20-gallon model, this tank offers greater stated capacity, but it also needs substantially more vertical room: its listed dimensions are 19.7 by 19.7 by 41.7 inches.
The carbon steel tank has a 1-inch NPT connector and a listed pre-charge of 2.5 BAR (36.2 PSI). Its stated maximum internal pressure is 8 BAR (116 PSI), and the listed working-temperature limit is 70°C (158°F). A larger tank may reduce pump cycling, but selection should still be based on the pump, pressure switch, and system requirements.
Important limitation: The listing says this tank is not suitable for drinking water and is not frost-proof. Its higher capacity does not make it appropriate for potable-water use.
Red Lion RL4A In-Line Pressure Tank
Best for: Compact pressure-boosting setups or smaller well systems where an in-line 4-gallon tank is suitable. The listing says it can maintain water pressure and reduce water hammer in pressure-boosting systems.
Its construction includes a 20-gauge steel tank, 304 stainless steel water connection, butyl rubber diaphragm, and propylene liner. The product is described as certified for safe, clean drinking water. Choose this model when its small size and in-line arrangement fit the system; choose a larger capacity if the pump cycles too frequently for the intended demand.
Setup note: It ships with a 20 PSI transport charge. Set the air pressure 2 PSI below the pressure-switch cut-in setting. Confirm that the in-line connection and capacity are appropriate for the installation.
Buying Guide: How To Choose A Shallow Well Pressure Tank
How much capacity do you need? Tank size affects how much water is available before the pump starts again. A 4- or 6-gallon tank can work in a space-limited setup, while 20- or 34-gallon models offer more stated capacity. Do not choose by gallon rating alone; check the well pump, pressure switch, expected demand, and manufacturer guidance.
Will the tank be used for drinking water? Check the product’s stated intended use and certifications. The Red Lion listings identify drinking-water certifications, while both VEVOR listings explicitly say they are not suitable for drinking water. Do not assume a steel pressure tank is potable-water-safe without confirmation.
Which orientation fits the installation? The Red Lion 6AH is horizontal, the RL20A and VEVOR models are vertical, and the RL4A is in-line. Measure the available floor area and height, and verify that the planned plumbing connection can be accommodated.
How should the pre-charge be set? Follow the instructions for the specific tank and pressure switch. For the Red Lion models, the listing says to set air pressure 2 PSI below the pressure-switch cut-in setting; their 20 PSI transport charge is not necessarily the correct operating setting. Disconnect power and follow safe procedures before servicing a pressurized system.
Does the installation face freezing temperatures? The VEVOR listings state that the tanks are not frost-proof. Protect the system from freezing or choose equipment suited to the installation conditions.
Frequently Asked Questions
What does a shallow well pressure tank do? It stores pressurized water for a well system and helps maintain pressure while the pump is off. It can also reduce how often the pump starts and stops.
Can a pressure tank be too small? Yes. A tank that does not suit the pump and water demand may contribute to frequent pump cycling. Match tank selection to the system rather than relying only on the household size.
Are all pressure tanks safe for drinking water? No. The VEVOR models listed here are explicitly not suitable for drinking water. Check the specific tank’s potable-water statements and certifications before use.
Does a pre-charged tank need adjustment? It may. The Red Lion listings state that the transport charge must be topped off or adjusted to 2 PSI below the pressure-switch cut-in setting. Follow the instructions for the tank and system.