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Reverse Osmosis Storage Tanks


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RO Tank 2 Gal, Steel, 1/4" MNPTRO Tank 2 Gal, Steel, 1/4
Part Number: RO-120
Alternate Part Number: 15092006, TK-PRO-2-SS
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
    • Volume 2.1 Gallons
    Volume @ 40psi 1.1 Gallons
    Connector 1/4" MPT
    Tank Materials Steel
    Origin Taiwan
    Certifications NSF 58
    View Details
    $46.33 

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    RO Tank 3.2 Gal, Plastic, 1/4" MNPTRO Tank 3.2 Gal, Plastic, 1/4
    Part Number: ROT-2400-P
    Alternate Part Number: ROPT201-PLW, TP12P, 52-35138,ROPRO4-W, RO-122P
  • Exterior/Interior made from durable polypropylene
  • Frame made from steel
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
    • Volume 3.2 Gallons
    Volume @ 40psi 2 Gallons
    Connector 1/4" MPT
    Tank Materials Polypropylene Exterior/Interior, Steel Tank Frame
    Origin Taiwan
    Certifications NSF 58
    View Details
    $54.77 

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    RO Tank 3 Gal, Steel, 1/4" NMPTRO Tank 3 Gal, Steel, 1/4
    Part Number: RO-122
    Alternate Part Number: TKE-2200W
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Includes plastic tank stand
    • Volume 3.2 Gallons
    Volume @ 40psi 2 Gallons
    Connector 1/4" MPT
    Tank Materials Steel
    Origin Taiwan
    Certifications NSF 58
    View Details
    $46.95 

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    Amtrol RO Tank 3 Gal, Steel, 1/4" NMPTAmtrol RO Tank 3 Gal, Steel, 1/4
    Part Number: 140S723
    Alternate Part Number: RO-3
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Includes plastic tank stand
    • Volume 3.2 Gallons
    Volume @ 40psi 2 Gallons
    Connector 1/4" MPT
    Tank Materials Steel
    Origin USA
    Certifications NSF 61
    View Details
    $63.87 

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    RO Tank 4.4 Gal, Steel, 1/4" NMPTRO Tank 4.4 Gal, Steel, 1/4
    Part Number: ROT-4W
    Alternate Part Number: RO-132, TK-PRO-4-SS, 15112006,55984-05
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Includes plastic tank stand
    • Volume 4.4 Gallons
    Volume @ 40psi 2.8 Gallons
    Connector 1/4" MPT
    Tank Materials Steel
    Origin Taiwan
    Certifications NSF 61
    View Details
    $43.97 

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    Amtrol RO Tank 4.4 Gal, Steel, 1/4" NMPTAmtrol RO Tank 4.4 Gal, Steel, 1/4
    Part Number: 141S351
    Alternate Part Number: RO-4, 140S351
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Includes plastic tank stand
    • Volume 4.4 Gallons
    Volume @ 40psi 2.8 Gallons
    Connector 1/4" MPT
    Tank Materials Steel
    Origin USA
    Certifications NSF 61
    View Details
    $65.88 

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    RO Tank 5.5 Gal, Steel, 1/4" MPTRO Tank 5.5 Gal, Steel, 1/4
    Part Number: ROT-6W
    Alternate Part Number: TK-PRO-6W, RO-152
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Plastic tank stand included
    • Volume 5.5 Gallons
    Connector 1/4" MPT
    Tank Materials Steel
    Origin Taiwan
    Certifications NSF 61
    View Details
    $58.40 

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    Amtrol RO Tank 10 Gal, Steel, 3/4" MNPTAmtrol RO Tank 10 Gal, Steel, 3/4
    Part Number: 143-132
    Alternate Part Number: RO-10
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • AMTROL RO-10 tank has a weld on tank stand.  
    • Volume 10 Gallons
    Volume @ 40psi 6.3 Gallons
    Connector 3/4" MPT
    Tank Materials Steel
    Origin USA
    Certifications NSF 61
    View Details
    $169.73 

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    RO Tank 10 Gal, SteelRO Tank 10 Gal, Steel
    Part Number: ROT
    Alternate Part Number: RO-760, RO-11,55984-06
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Comparable to the Amtrol RO-10 tank.
    • Volume 10.3 Gallons
    Volume @ 40psi 6.3 Gallons
    Connector 1/4" MPT, 3/4" MPT
    Tank Materials Steel
    Origin Taiwan
    Certifications NSF 58
    View Details
    $139.88 

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    RO Tank 14 Gal, SteelRO Tank 14 Gal, Steel
    Part Number: ROT
    Alternate Part Number: RO-1070, TKE-1070-14B-34, RO-1070
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Comparable to the Amtrol RO-14 tank.
    • Volume 14 Gallons
    Volume @ 40psi 9 Gallons
    Connector 1/4" MPT, 3/4" MPT
    Tank Materials Steel
    Origin Taiwan
    Certifications NSF 58
    View Details
    $130.98 

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    Amtrol RO-14 RO Tank 14 Gal, Steel, 3/4 MNPTAmtrol RO-14 RO Tank 14 Gal, Steel, 3/4 MNPT
    Part Number: 143
    Alternate Part Number: 143-293, 143-198, RO-14
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Five Year Warranty
    • Volume 14 Gallons
    Volume @ 40psi 9.0 Gallons
    Connector 1/4" MPT, 3/4" MPT
    Tank Materials Steel
    Origin USA
    Certifications NSF 61
    View Details
    $152.30 

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    RO Tank 20 Gal Steel NSF 3/4" MNPTRO Tank 20 Gal Steel NSF 3/4
    Part Number: ROT-20
    Alternate Part Number: RO-20, 144-120, 55984-07
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Comparable to the Amtrol RO-20 tank.
    • Volume 20 Gallons
    Volume @ 40psi 11 Gallons
    Connector 1" MPT, 3/4" MPT
    Tank Materials Steel
    Origin Taiwan
    Certifications NSF 61
    View Details
    $198.88 

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    ROMATE Tank 20 Gal, Fiberglass, 1" NMPTROMATE Tank 20 Gal, Fiberglass, 1
    Part Number: ROMATE-20
    Alternate Part Number: 30839
  • High density polyethylene inner liner
  • Fiberglass-wound/epoxy resin-sealed outer shell
  • Volume: 19.8 gallons
  • Dimensions: 32.25" (H) x 16" (D)
  • Connection: 1" male NPT
    • Volume 19.8 Gallons
    Volume @ 40psi 11 Gallons
    Connector 1" MPT
    Tank Materials Fiberglass
    View Details
    $269.00 

    3+ for $242.10 ea

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    RO Tank 32 Gal Steel NSF 1.25" MNPT SS ElbowRO Tank 32 Gal Steel NSF 1.25
    Part Number: ROT-32
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Welded on tank stand
    • Volume 32 Gallons
    Volume @ 40psi 17.5 Gallons
    Connector 1-1/4" MPT
    Tank Materials Steel
    Origin USA
    Certifications NSF 61
    View Details
    $314.99 

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    Amtrol RO Tank 34 Gal, Steel, 1-1/4" NMPTAmtrol RO Tank 34 Gal, Steel, 1-1/4
    Part Number: 147-47
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Welded on tank stand
    • Volume 34 Gallons
    Volume @ 40psi 18.2 Gallons
    Connector 1-1/4" MPT
    Tank Materials Steel
    Origin USA
    Certifications NSF 61
    View Details
    $299.00 

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    ROMATE Tank 40 Gal, Fiberglass, 1" NMPTROMATE Tank 40 Gal, Fiberglass, 1
    Part Number: ROMATE-40
    Alternate Part Number: 30865, DEV3115-72, 55984-08
  • High density polyethylene inner liner
  • Fiberglass-wound/epoxy resin-sealed outer shell
  • Volume: 40.3 gallons
  • Dimensions: 56.75" (H) x 16" (D)
  • Connection: 1" male NPT
    • Volume 40.3 Gallons
    Volume @ 40psi 22 Gallons
    Connector 1" MPT
    Tank Materials Fiberglass
    Certifications NSF 61
    View Details
    $339.00 

    3+ for $305.10 ea

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    RO Tank 44 Gal, Steel NSF 1.25" MNPTRO Tank 44 Gal, Steel NSF 1.25
    Part Number: ROT-44
  • High quality urethane paint
  • Stainless Steel Connection
  • Brass Air Valve with o-ring seal
  • Controlled Action Diaphragm
  • Heavy Duty Butyl diaphragm
    • Volume 44 Gallons
    Volume @ 40psi 17.7 Gallons
    Connector 1-1/4" MPT
    Tank Materials Steel
    Certifications NSF 61
    View Details
    $424.99 

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    Amtrol RO-44 RO Tank 44 Gal, Steel, 1.25"NMPTAmtrol RO-44 RO Tank 44 Gal, Steel, 1.25
    Part Number: 147-69
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Welded on tank stand
    • Volume 34 Gallons
    Volume @ 40psi 24.1 Gallons
    Connector 1-1/4" MPT
    Tank Materials Steel
    Origin USA
    View Details
    $409.00 

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    ROMATE 80 Gal, Fiberglass, 1-1/4" MNPTROMATE 80 Gal, Fiberglass, 1-1/4
    Part Number: ROMATE-80
    Alternate Part Number: 31054, DEV3115-73, 55984-09
  • High density polyethylene inner liner
  • Fiberglass-wound/epoxy resin-sealed outer shell
  • Volume: 86.7 gallons
  • Dimensions: 55.5" (H) x 24.25" (D)
  • Connection: 1-1/4" male NPT
    • Volume 86.7 Gallons
    Volume @ 40psi 47.55 Gallons
    Connector 1-1/4" MPT
    Tank Materials Fiberglass
    View Details
    $558.00 

    3+ for $502.20 ea

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    RO Tank 85 Gal Steel NSF 1.25" MNPTRO Tank 85 Gal Steel NSF 1.25
    Part Number: ROT-85
  • High quality urethane paint
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Brass Air Valve with o-ring seal
  • Controlled Action Diaphragm
    • Volume 85 Gallons
    Volume @ 40psi 47.2 Gallons
    Connector 1-1/4" MPT
    Tank Materials Steel
    View Details
    $615.99 

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    Amtrol RO Tank 86 Gal, Steel, 1.25" NMPTAmtrol RO Tank 86 Gal, Steel, 1.25
    Part Number: 150-6
  • Powder Coated Steel Exterior
  • Reservoirs are enclosed polypropylene/butyl
  • Stainless Steel Connection
  • Welded on tank stand
    • Volume 86 Gallons
    Volume @ 40psi 47.2 Gallons
    Connector 1-1/4" MPT
    Tank Materials Steel
    Origin USA
    Certifications NSF 61
    View Details
    $489.00 

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    Tank Stand for 1 gal to 4 gal RO TanksTank Stand for 1 gal to 4 gal RO Tanks
    Part Number: 141-950
    Plastic Tank Stand for Reverse Osmosis Accumulator Tanks fits Amtrol®  RO Tank models RO-1, RO-2, RO-3, RO-4 AND PAE RO Tank models RO-122 (3.2 gal), RO-132 / ROT-4W (4.4 gal).View Details
    $3.86 

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    Tank Stand for 3 to 4 Gal RO TanksTank Stand for 3 to 4 Gal RO Tanks
    Part Number: PTS502
    Plastic Tank Stand for Reverse Osmosis Accumulator Tanks fits most RO Tanks with an empty capacity of 3 to 4 gallons, including Amtrol®  RO-4,  PAE RO Tank models RO-122 (3.2 gal), RO-132 / ROT-4W (4.4 gal).Does not fit 2 gal...View Details
    $4.16 

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    Tank Pressure GaugeTank Pressure Gauge
    Part Number: 54846
    Tank Pressure Gauge:Procedure for Testing Tank pressure:Turn inlet line off. Drain Tank, leave sink valve open.Locate and remove air valve cap (top, bottom or side of tank)Test tank pressure, inflate with bicycle pump to 7 psiView Details
    $8.79 

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    Sanitizer Syringe 12ccSanitizer Syringe 12cc
    Part Number: C1085
    Sanitizer Syringe with Luer Slip 12cc Features:Construction: Polypropylene Body and Plunger with a Polyisoprene Seal Use: Sanitizing filter housings, tubing and RO TanksSanitizer Syringe 12cc Instructions:Remove tube from Tank Valve and...View Details
    $1.49 

    10+ for $1.19 ea
    25+ for $.97 ea
    50+ for $.89 ea
    100+ for $.75 ea

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    Union Tee - 1/4" x 1/4" x 1/4" Push-inUnion Tee - 1/4
    Part Number: ATU040404
    Three-way connector used to branch off tubing. Equal tees have the branch of equal size while reducing tees branch off to the next smaller size. Easy-to-use push-in connections for tubes.View Details
    $1.93 

    20+ for $1.54 ea
    50+ for $1.35 ea

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    Union Tee - 3/8" x 3/8" x 3/8" Push-inUnion Tee - 3/8
    Part Number: ATU060606
    Three-way connector used to branch off tubing. Equal tees have the branch of equal size while reducing tees branch off to the next smaller size. Easy-to-use push-in connections for tubes.View Details
    $2.80 

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    REDUCING Union Tee - 3/8" x 3/8" x 1/4" Push-inREDUCING Union Tee - 3/8
    Part Number: ATU060604
    Three-way connector used to branch off tubing. Equal tees have the branch of equal size while reducing tees branch off to the next smaller size. Easy-to-use push-in connections for tubes.View Details
    $2.76 

    10+ for $2.24 ea
    40+ for $1.79 ea

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    Shut-Off Valve-Polypro Elbow NPTF - 1/4 x 1/4 NPTFShut-Off Valve-Polypro Elbow NPTF - 1/4 x 1/4 NPTF
    Part Number: PPSV500822W
    View Details
    $7.16 

    5+ for $6.09 ea
    10+ for $4.51 ea
    40+ for $3.94 ea
    100+ for $3.58 ea

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    Shut-Off Valve-Polypro Elbow NPTF - 3/8 x 1/4 NPTFShut-Off Valve-Polypro Elbow NPTF - 3/8 x 1/4 NPTF
    Part Number: PPSV501222W
    View Details
    $7.45 

    5+ for $6.33 ea
    10+ for $4.69 ea
    40+ for $4.10 ea
    100+ for $3.73 ea

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    Shut-Off Valve-PVC Elbow NPTF - 3/8 Push-in x 3/4 Female NPTFShut-Off Valve-PVC Elbow NPTF - 3/8 Push-in x 3/4 Female NPTF
    Part Number: I141F625
    Recommended for use as a TANK VALVE such as the 14 gallon storage tank  .  A 3/4" Female Coupling is provided to connect 3/4" male NPT end of tank valve to 3/4" male NPT tank inlet.Features:Exclusive 1/4 turn lever with...View Details
    $13.71 

    10+ for $10.28 ea
    50+ for $8.91 ea

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    Shut-Off Valve-PVC Elbow NPTF - 1/2 Push-in x 3/4 Female NPTFShut-Off Valve-PVC Elbow NPTF - 1/2 Push-in x 3/4 Female NPTF
    Part Number: I141F825
    Recommended for use as a TANK VALVE such as the 14 gallon storage tank  .  A 3/4" Female Coupling is provided to connect 3/4" male NPT end of tank valve to 3/4" male NPT tank inlet.Features:Exclusive 1/4 turn lever with...View Details
    $13.97 

    10+ for $10.48 ea
    50+ for $9.08 ea

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    RO HOLDING TANK CAPACITY AT VARIOUS INLET PRESSURES PRE-CHARGED PRESSURE @ 5 PSIG
    NOTE: PRECHARGE FOR ROMATE20, 40 & 80 = 10 PSIG

    Model No. Total Tank
    Volume (gal)    		 Gals @
    20 psig    		 Gals @
    30 psig    		 Gals @
    40 psig    		 Gals @
    50 psig    		 Gals @
    60 psig    		 Gals @
    70 psig
    RO-2/RO120 2.0 0.9 1.1 1.3 1.4 1.5 1.5
    RO-3/RO122 3.2 1.4 1.8 2.0 2.2 2.4 2.5
    RO-4/RO132* 4.4 1.9 2.5 2.8 3.1 3.2 3.4
    RO-10/RO760 10.0 4.3 5.6 6.3 6.9 7.3 7.6
    RO-14/RO1070 14.0 6.1 7.8 9.0 9.7 10.3 10.7
    ROMATE20 19.8 5.7 8.9 10.9 12.2 13.3 14.0
    RO-20/RO2000 20.0 5.8 8.9 11.0 * * *
    RO-34 34.0 9.1 14.7 18.2 20.6 22.4 23.8
    ROMATE40 40.3 11.6 18.0 22.1 24.9 27.0 28.5
    RO-44 44.0 12.7 19.7 24.1 27.2 29.5 31.2
    RO-86 86.0 24.8 38.5 47.2 53.2 * *
    ROMATE80 86.7 24.99 38.8 47.5 53.6 58.03 61.42

    *  RO-4 / RO-132 / ROT-4 is the Standard Size RO Tank for most RO systems.

    One of the pitfalls of using an RO system is the capacity of the RO storage tank. RO Water Tank Holding Capacity is dependent on INLET water pressure to the tank and the RO tank air pressure. Typically the RO Tank Capacity is 50% of the Total RO Tank Volume (empty). Many popular systems come with RO tanks with storage and the capacities that range from 4 gallons to 25 gallons RO tanks and up. One of the easies ways to extend the available filtered water is to add an additional RO water storage tank.

    Options to increase Reverse Osmosis Water Tank Storage Capacity:

    1. Tee a line to a second tank of any capacity
      - must have the same precharge as your existing tank
    2. Remove the existing RO water tank and replace with a larger tank of your choice


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