Section 13: RO Storage Tanks & Bladder Tanks
13.1: RO Metal Tanks (ROT)
RO metal storage and bladder tanks are heavy duty and NSF listed, providing years of trouble free operations. They can be installed. either vertically or horizontally. They keep water tasting fresh.
Features
- Manufactured of FDA-approved materials
- Diaphragm post-cured to eliminate odors from the tank
- Discharges in a vertical or horizontal position
- Stainless Steel connector
Applications
- POU RO Systems
- Residential & Light Commercial
- Maximum operation temp 180°F
- Maximum working pressure: 80 psi

RO Metal Tanks (ROT)
Item | Tank Volume | Water Volume @ 60psi | Color | Tank Diameter | Tank Height | Port Size |
ROTM-2WH | 2 GAL | 1.2 GAL | White | 9" | 12" | ¼"-NPT-Male |
ROTM-2BL | 2 GAL | 1.2 GAL | Blue | 9" | 12" | ¼"-NPT-Male |
ROTM-3WH | 3 GAL | 2.2 GAL | White | 10" | 15" | ¼"-NPT-Male |
ROTM-3BL | 3 GAL | 2.2 GAL | Blue | 10" | 15" | ¼"-NPT-Male |
ROTM-4WH | 4 GAL | 3.2 GAL | White | 12" | 15" | ¼"-NPT-Male |
ROTM-4BL | 4 GAL | 3.2 GAL | Blue | 12" | 15" | ¼"-NPT-Male |
ROTM-14WH | 14 GAL | 11.0 GAL | White | 17" | 25" | ¾"-NPT-Male |
ROTM-14BL | 14 GAL | 11.0 GAL | Blue | 17" | 25" | ¾"-NPT-Male |
ROTM-20WH | 20 GAL | 15.0 GAL | White | 17" | 33" | ¾"-NPT-Male |
ROTM-20BL | 20 GAL | 15.0 GAL | Blue | 17" | 33" | ¾"-NPT-Male |
13.2: Amtrol® RO Metal Tanks
Features
- Certified by NSF, Standard 58
- Meets U.S. FDA Spec 121.2500, Sub F
- Fully enclosed polypropylene and butyl water reservoir
- Provides longest life and most complete water discharge
- Durable steel tank
Applications
- Potable water
- Maximum operation temp 200°F
- Maximum working pressure: 100 psi

Amtrol® RO Tanks
Item | Tank Volume | Water Volume @ 40psi | Water Volume @ 60psi | Tank Diameter | Tank Height | Port Size |
AMT-144-120 | 20.0 GAL | 9.1 GAL | 12.0 GAL | 16" | 33" | 1"-NPT-Male |
AMT-147-47 | 34.0 GAL | 15.6 GAL | 20.5 GAL | 23" | 31" | 1¼"-NPT-Male |
AMT-147-69 | 44.0 GAL | 20.0 GAL | 26.5 GAL | 23" | 37" | 1¼"-NPT-Male |
AMT-150-6 | 86.0 GAL | 39.3 GAL | 50 GAL | 27" | 27" | 1¼"-NPT-Male |

RO Metal Tanks (ROT)
Item | Description | Tank |
OPT-POU-T100-38 | Stainless Steel Tank Adapter Kit 1" X ⅜" Tubing | 20.0 GAL |
OPT-POU-T100-12 | Stainless Steel Tank Adapter Kit 1" X ½" Tubing | 20.0 GAL |
OPT-POU-T125-38 | Stainless Steel Tank Adapter Kit 1 ¼" X ⅜" Tubing | 34, 44, 86 GAL |
OPT-POU-T125-12 | Stainless Steel Tank Adapter Kit 1 ¼" X ½" Tubing | 34, 44, 86 GAL |
13.3: RO Plastic Tanks (ROTP)
RO plastic storage tanks are manufactured of the highest-grade polypropylene that never chip, rust, dent or leak.
Features
- Diaphragm eliminates odors and bad tastes from the tank
- Discharges in a vertical or horizontal position
- Certified by NSF, Standard 58
Applications
- POU RO Systems
- Residential
- Maximum operation temp: Cold water use only
- Maximum working pressure: 80 psi

RO PLASTIC BLADDER TANKS
Item | Tank Volume | Water Volume @ 40psi | Color | Tank Diameter | Tank Height | Port Size |
ROTP-1WH | 1.2 GAL | 1 GAL | White | 9" | 14" | ¼"-NPT-Male |
ROTP-1BL | 1.2 GAL | 1 GAL | Blue | 9" | 14" | ¼"-NPT-Male |
ROTP-3WH | 3 GAL | 2.2 GAL | White | 10" | 15" | ¼"-NPT-Male |
ROTP-4WH | 4 GAL | 3.6 GAL | White | 11" | 15" | ¼"-NPT-Male |
ROTP-4BL | 4 GAL | 3.6 GAL | Blue | 11" | 15" | ¼"-NPT-Male |

Working Parameters:
- Maximum operation temp: Cold water use only
- Maximum working pressure: 100 psi
RO PLASTIC BLADDER TANKS
Item | Tank Volume | Water Volume @ 40psi | Color | Tank Diameter | Tank Height | Port Size |
ROTPS-3W | 3.2 GAL | 2.2 GAL | White | 9.4" | 14.3" | ¼"-NPT-Male |
ROTPS-4W | 4.2 GAL | 3.2 GAL | White | 9.8" | 14.6" | ¼"-NPT-Male |
ROTPS-5W | 5 GAL | 4.0 GAL | White | 11" | 15.8" | ¼"-NPT-Male |
13.4: Plastic Atmospheric Tanks
Vertical - Flat Top tanks feature additional flats for fitting installation or mounting. Tank are free standing with a flat bottom for indoor or outdoor installations. Ace Roto-Mold Vertical Tanks conform to the requirements of NSF/ANSI Standard 61. Tanks are manufactured from medium- or high-density polyethylene with U.V. inhibitors. Tank walls are translucent for level viewing and equipped with gallon indicators.
Features
- Durable Materials
- Installation Ease
Applications
- Water
- Liquid Fertilizer
- Waste Vegetable Oil
- Agricultural Chemicals
- Reverse Osmosis Systems

Atmospheric Polyethylene Holding Tanks, Vertical, Flat Top:
Item | Capacity Galons | Tank Diameter | Overall Height | Lid Size | System Connection |
ATPH-055 | 55 | 23" | 38" | 8" | 1" |
ATPH-075 | 75 | 23" | 50" | 7" | 1" |
ATPH-100 | 100 | 28" | 45" | 7" | 1" |
ATPH-160 | 100 | 28" | 68" | 8" | 1" |
ATPH-200 | 200 | 36" | 53" | 8" | 1.5" |
ATPH-295 | 295 | 42" | 55" | 16" | 2" |
ATPH-420 | 420 | 42" | 75" | 16" | 2" |
ATPH-500 | 500 | 46" | 77" | 8" | 2" |
ATPH-850 | 850 | 54" | 94" | 8" | 2" |
Bulkhead Fittings for Atmospheric Holding Tanks:
Item | Description |
ATPH-TF034 | PVC Bulkhead Fitting Assy ¾" |
ATPH-TF100 | PVC Bulkhead Fitting Assy 1" |
ATPH-TF150 | PVC Bulkhead Fitting Assy 1.5" |
ATPH-TF200 | PVC Bulkhead Fitting Assy 2" |
FLOAT SWITCHES, SEE SECTION 20.6.
NOTE: Dimensions and capacities may vary. Standard gasket EPDM.