Answer
8×30 or 12×40 mesh for gravity and pressure filters; 4×8 for vapour beds.
Detailed question
Which mesh for a water filter?
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RXSOL CHEMO PHARMA International Navi Mumbai, India
Try "boiler water treatment", "tank cleaner" or a chemical name such as "citric acid".
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8×30 or 12×40 mesh for gravity and pressure filters; 4×8 for vapour beds.
Which mesh for a water filter?