Reverse Osmosis RO Tank


Water goes through a reverse osmosis membrane very slowly and people don't have the time or patience to wait a long time to get a single glass of water. For this reason, most home/residential reverse osmosis systems need a water storage tank to store the purified RO water. Reverse osmosis storage tanks can delivery stable and constant water flow when the faucet is opened. The concern that pollutants might come from air or animals with the use an opened tank favors the use of a closed expansion tank.

Lead leaching to drinking water the cause of health risks, and brass and copper are banned for use in purified/drinking water; so all PAE expansion tanks use stainless steel connections to avoid the lead leaching concerns.

To avoid bad odors from diaphragm, all of our diaphragms are post-cured before assembly, to eliminate the possibility of odors from the tank. Tanks are NSF approved under standard 58, and CE approved under the PED (pressure equipment directive), because of these approvals our tanks carry the appropriate marks and can be used everywhere in the world.

Tank Sizing:

Model No.DimensionsTotal Tank VolumeShipping VolumeShipping Weight
TP-3553.821.131.812.54.51.735 9.20.0561.937.115.7

NOTE: Maximum Working Pressure: 100PSI
All Tanks are Pre-charged at 6 PSI
All tanks are NSF listed

TankPAC Industries Co., Ltd. is one of the largest pressure tank manufactures in the world today. To provide the high quality tanks and good service to satisfy our customers needs is always our goal. Good is not enough for us; we want to be the best in the industry.

TankPAC pressure tanks use a butyl diaphragm and polypropylene liner to separate the water and air. These materials limit the growth of germs and prevent impurities inside the tank.

Advantages of a Metal Diaphragm-type Expansion Tank

  • Metal shell has greater pressure resistance than plastic
  • Lower molecular porosity of metal eliminates air pressure loss
  • Diaphragm-type design assure stable water outflow

Storage Capacity @ Model #
40 PSI1.88 Gallon2.73 Gallon
45 PSI1.98 Gallon2.87 Gallon
50 PSI2.06 Gallon3.00 Gallon
55 PSI2.13 Gallon3.10 Gallon
60 PSI2.20 Gallon3.21 Gallon
100 PSI3.20 Gallon4.40 Gallon


  • Stainless steel connection built for Reverse Osmosis water storage tank; pump tank & thermal tank applications
  • Brass cap with internal O-ring guarantees no air loss from air-vent
  • Smooth internal air vent cap prevents diaphragm damaged
  • High-grade butyl diaphragm, post-cure procedure insures a tasteless and odorless water chamber
  • NSF listed : Please click to check NSF certification in the below link under "TankPAC Industries Co., Ltd. / Global Water Solutions Ltd (GWS)".
  • IAMPO approved
  • CE Mark approved
Products (Total Items: 16)
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20 Gallon Reverse Osmosis Storage Tank PAE Tank  RO-2000
Part Number: 105012

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14 Gallon Reverse Osmosis Storage PAE Tank RO-107
Part Number: 105011

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5 Gallon Reverse Osmosis Storage PAE Tank RO-152
Part Number: 105010

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3.2 Gallon Reverse Osmosis Storage PAE Tank RO-122
Part Number: 105004

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4.4 Gallon Standard Size Reverse Osmosis Storage PAE Tank RO-132
75.00  60.00
Part Number: 105006

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Tank Stand for RO-132, RO-122, and RO-155
Part Number: 105003

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2 Gallon Reverse Osmosis Storage PAE Tank RO-120
Part Number: 105005

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200L Stainless Steel Water Storage Tank with Level Switch.
995.00  645.00
Part Number: 105007

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1 Gallon Reverse Osmosis Storage PAE Tank TP-4
Part Number: 105002

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0.5 Gallon Reverse Osmosis Storage PAE Tank RO-105
Part Number: 105001

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Tank Ball Valve 1/4
Average Rating(1)
Part Number: 105137

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Tank Ball Valve
Part Number: 105139

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Tank Ball Valve 3/8
Part Number: 105138

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 5 meter (16.4 ft) 1/4
Average Rating(1)
Part Number: 105179

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25 ft -1/4
Average Rating(2)
Part Number: 105172-25

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(16.00 Ft) - 3/8
Part Number: 105183-16

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