Georgia Water Tanks Online Store - Tanks, Pumps, and Filters - Rainwater Harvesting
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Pressure Tanks

Shop pressure tanks for residential, agricultural, and light commercial water systems, featuring the Pentair WellMate composite line along with a handful of other trusted brands. Pressure tanks help maintain consistent water pressure, reduce pump cycling, and extend pump life for well and municipal water systems alike.

PENTAIR WELLMATE
WellMate composite pressure tanks are built from continuous fiberglass strands sealed with high-grade epoxy resin, giving them corrosion resistance that steel tanks can't match along with roughly half the weight of a comparable steel tank — making installation easier for a two-person job. The WM Series ranges from compact in-line tanks (2 and 4.6 gallons) up to large-capacity vertical tanks like the WM-25WB at 86.7 gallons, with drawdown capacities scaling accordingly — for example, the WM-9 delivers 29.5 gallons of capacity with roughly 8.9 gallons of usable drawdown at 30/50 PSI. All WM Series tanks are rated for a maximum working pressure of 125 PSI and are WQA-tested and NSF/ANSI certified for potable water use.

OTHER BRANDS
We also carry a select range of steel bladder and diaphragm pressure tanks to fit different budget and application needs, from compact residential units to larger commercial capacities.

Available in a range of sizes and connection types, from small 2-gallon in-line tanks to large 85+ gallon composite tanks, our pressure tank lineup covers new well installations, replacements, and system upgrades.
Fiberglass pressure tank, 47 gallon, 21"D x 42"H, 125 psig max, 1¼" MPT connection, suitable for potable water. 5 year warranty. Stocked in Doraville Warehouse
$1,468.00
    ​The WellMate WM-25WB is an 86.7-gallon (328-liter) composite pressure tank designed for residential, agricultural, and light commercial water systems. ​Its corrosion-proof construction and lightweight design offer significant advantages over traditional steel tanks.
$2,007.00
Sale

The WellMate WM-35WB is a corrosion-proof well pressure tank that is made with a composite of continuous fiberglass strands sealed with high-grade epoxy resin. They won't rust, dent, or come apart at the seams, and a rugged impact proof base is included. The WellMate WM-35WB comes with a 5 year warranty with a one year replacement labor allowance.


Features:
  • Corrosion-proof composite construction
  • Won’t rust in corrosive environments, particularly important in coastal regions
  • Little or no maintenance
  • Longer life, greater flexibility
  • Light weight
  • Replaceable air cell


Fiberglass Water Tank, Precharged, Tank; Vertical Tank Style, Full Acceptance, Inlet/Outlet MNPT 1-1/4 In., Precharge Pressure 40 PSI, Max. Working Pressure 125 PSI, Max. Temp. 120 F, Height 75-3/8 In., Dia. 24 In, non-ASME. 92# shipping weight. 5 year warranty. 
$2,948.00 $3,684.00
​The Pentair Comptec CPV-185T is a composite captive air tank designed to maintain system pressure when the pump is not operating, thereby enhancing the longevity of both the pump and the overall water system. 

Fiberwound pressure tank, 185 gallon, vertical tank style, full acceptance, max working pressure 125 PSI., max temp 120°F. 2" FPT connection, 316 stainless. Nonstock. Price does not include freight.
$9,356.00

​The WellMate WM-6 (WM0075 C) Pressure Tank is a durable, corrosion-resistant solution for residential and light commercial water systems. Constructed from fiberglass, it offers a lightweight alternative to traditional steel tanks, simplifying installation and maintenance.​ 19.8 gallon, 16"D x 32"H, 125 psig max, 1" MPT connection, suitable for potable water.

$724.00
The WellMate WM-14WB QC is a 47.1-gallon (178-liter) composite pressure tank designed for residential, light commercial, and pressure boosting applications.Its corrosion-proof construction and lightweight design offer significant advantages over traditional steel tanks.​  21"D x 42"H, 125 psig max, 1¼" MPT connection, suitable for potable water. 5 year warranty. Stocked in Doraville Warehouse
$1,468.00
Rain Harvesting 16-inch standard tank screen cover. Fits over the tank manway opening to keep out debris, insects, and light while allowing water to pass through.
$65.00
Rain Harvesting 12-inch standard tank screen cover. Fits over the tank inlet opening to keep out debris, insects, and light while allowing water to pass through.
$27.29
The WellMate WM-12 (also known as WM0150) is a 40.3-gallon composite pressure tank designed for residential and light commercial water systems. Its corrosion-resistant fiberglass construction ensures durability and longevity, making it an ideal choice for environments where steel tanks are prone to rust.
$1,002.00

​The WellMate WM-20 Classic (Part Number: CH31050) is a 60.0-gallon (227-liter) composite pressure tank designed for residential, light commercial, and pressure boosting applications. Its corrosion-proof construction and lightweight design offer significant advantages over traditional steel tanks.​

$1,944.00
Sale
The WellMate WM-35 (also known as WM0450) is a 119.7-gallon composite pressure tank designed for residential, agricultural, and light commercial water systems. Its corrosion-resistant fiberglass construction ensures durability and longevity, making it an ideal choice for environments where steel tanks are prone to rust.
$2,160.00 $3,684.00
    ​The WellMate WM-25WB is an 86.7-gallon (328-liter) composite pressure tank designed for residential, agricultural, and light commercial water systems. ​Its corrosion-proof construction and lightweight design offer significant advantages over traditional steel tanks.
$2,007.00
The Tank-Pressure.020.QC is a 20-liter stainless steel pressure tank designed for industrial applications requiring efficient fluid handling and storage. Its robust construction and Quick Connect fittings ensure durability and ease of maintenance.
$724.00
The WellMate WM-6 / WM0075 QC is a 19.8-gallon composite pressure tank designed for residential and light commercial water systems. Its corrosion-resistant fiberglass construction and Quick Connect (QC) bottom plumbing ensure durability, ease of installation, and maintenance.
$724.00
The Tank-Pressure.002SS is a compact 2-liter stainless steel pressure tank designed for small-scale water systems. Its durable construction ensures longevity and reliable performance in various applications.
$30.00
The WellMate WM-12 (also known as WM0150) is a 40.3-gallon composite pressure tank designed for residential and light commercial water systems. Its corrosion-resistant fiberglass construction ensures durability and longevity, making it an ideal choice for environments where steel tanks are prone to rust.
$1,108.00

40.3-gallon WellMate Composite Pressure Tank with a Quick Connect bottom connection, replaceable air cell, and corrosion-resistant fiberglass construction. Designed for residential and light commercial well-water pressure systems.


Key Specifications:

- Brand/Model: WellMate WM-12 / WM0150

- Capacity: 40.3 gallons (153 liters)

- Drawdown: approx. 12.1 gallons (45.8 L) at 30/50 psi switch setting

- Material: Fiberglass composite (HDPE liner, fiberglass filament wound outer shell, epoxy resin sealed)

- Connection: 1" male NPT with Quick Connect bottom fitting

- Tank Dimensions: 16" diameter x 57" overall height

- Maximum Operating Pressure: 125 psi (8.6 bar)

- Maximum Temperature: 120°F

- Assembly Weight: approx. 29 lb

- Warranty: 5 years

$1,442.00

The WellMate WM-25WB QC is an 86.7-gallon composite Fiberglass pressure tank built for residential, agricultural, and light commercial water systems. It features a rustproof fiberglass construction and Quick Connect (QC) bottom plumbing for simplified installation and maintenance. 24"D x 56"H, 125 psig max, 1¼" MPT connection, suitable for potable water. Replaceable bladder, 5 year warranty. Stocked in Doraville Warehouse

$2,007.00
Sale
The WellMate WM-35WB QC is a 119-gallon composite pressure tank designed for residential, commercial, and agricultural water systems requiring large water storage and consistent pressure. The "QC" designation stands for Quick Connect, allowing easier installation and servicing compared to traditional threaded tanks.

WellMates Quick Connect series of captive air tanks utilize threadless connections at both the service connection and the tank drain assembly in order to improve both the ease of installation and product serviceability. The Quick Connect feature allows for ease of installation and serviceability and allows for a variety of plumbing connections (plastic, metallic, threaded or sweat). The tank can be rotated after installation so product specifications are accessible.

Technical Specs
- Capacity In gallons: 119
- Drawdown/Gallons: 35.9 @ 30-50 psi
- 24-1/4" x 74-1/2"
- Tested and Certified by the Water Quality Association (WQA)
- NSF/ANSI Standard 61 Section 8 and Annex G

$2,948.00 $3,684.00
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