Frequently asked questions
What does reverse osmosis service usually include?
It typically includes membrane cleaning (CIP) and disinfection, performance review and normalization, cartridge filter and pretreatment checks, chemical dosing review, troubleshooting, and membrane replacement planning.
What is RO CIP and when is it needed?
RO CIP (clean-in-place) is a controlled chemical cleaning of installed membranes to remove scale, metal deposits, organics, and biological growth. It is usually needed when output drops, pressure rises, or permeate quality slips, and the cause should be identified first so the right approach is used.
Which chemicals does an RO system need?
Common ones are antiscalant to prevent scale, sodium metabisulfite or carbon to remove chlorine, acid or caustic for pH control, and cleaning chemicals such as citric, malic, or glycolic acid, caustic with surfactants or EDTA, and non-oxidizing biocides. The right set depends on your feed water, which is why it should be reviewed for your system.
Why do RO systems lose performance over time?
Fouling, scaling, oxidant damage, unstable pretreatment, and weak monitoring can all reduce flow and rejection over time.
Does pretreatment affect membrane life?
Yes. Pretreatment stability directly affects fouling risk, cleaning frequency, and membrane life.
How often should RO membranes be replaced?
It depends on feed quality, pretreatment, and maintenance history. Replacement is usually considered when cleaning no longer restores performance or permeate quality can no longer meet your needs.