Description
Stainless Steel RO Storage Tank – 12 Litre
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Total Volume: 12 Litres (approx. 3.2 Gallons)
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Actual Water Capacity: ~8 Litres (at standard 40-60 PSI)
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Connection: ¼” NPT Male Thread
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Dimensions: 350mm (Height) x 240mm (Diameter)
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Weight: ~4.0 kg
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Empty Tank Air Pre-Charge Requirements
Tank Size Recommended Air Pressure (Empty) Maximum Working Pressure 12 Litre 0.45 bar (approx. 7 PSI) 6.9 bar (100 PSI) 24 Litre 0.45 bar (approx. 7 PSI) 6.9 bar (100 PSI) 40 Litre 0.50 bar (approx. 8 PSI) 6.9 bar (100 PSI) 74 Litre 0.55 bar (approx. 8 PSI) 6.9 bar (100 PSI) -
Isolate & Empty: Turn off the water supply to the RO system and open the RO faucet until the water stops flowing completely. This ensures there is no back-pressure from the water.
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Locate the Valve: On the side or bottom of the stainless steel tank, there is a small plastic cap. Unscrew it to reveal a standard Schrader Valve (exactly like a car or bicycle tire valve).
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Check Pressure: Use a low-pressure digital gauge. If it reads $0$, the bladder has lost its charge.
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Pump Slowly: Use a manual bicycle pump or a small compressor.
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Warning: Only add a few pumps at a time. Because the air chamber is small, the pressure rises very quickly.
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Target: Aim for 0.45 bar. If you go over, simply bleed a little air out using the center pin of the valve.
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Best For: Standard under-sink residential RO systems for a family of 2–4.





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