Regenerative media filters

PWTAG Technical notes are updates or new material for the standards and guidance given in the PWTG book, Swimming Pool Water and the PWTAG Code of practice and should be read in association with these publications.

This note reviews the functionality of regenerative media filters (RMFs). It is based on research including site visits, pool water tests, and discussions with major manufacturers. PWTAG’s work on this subject has spanned more than two years.


Non-regenerative (or pre-coat) filters have been used for some time – more abroad than in the UK. They can be effective, and take up less space than traditional sand filters, but their practical limitations have made it impossible for PWTAG to recommend them on large, busy public pools. They demand more skill from operators than sand filters.


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