FILTER MEDIA REPLACEMENT

Keeping Your Swimming Pool Facility Clean

Replacement of the filter media is a very important part of keeping the quality of the pool/spa water in good condition, as well as crystal clear. We recommend the media should be changed every 3 to 5 years on a pool and 1-2 years on a spa, depending on bather loads, backwashing schedules and size of filters. We are very competitive with our pricing and will aim to beat written quotations.

FILTER MEDIA

The two most common types of filter media are sand and glass. The sand specification is commonly 16/30 dried silica sand, to the requirements of BSEN 12904. Glass media is available from a number of manufacturers, with varying grades. There is a separatePWTAG technical note on glass media.

The media in a filter is typically multi-layered, with a larger diameter (typically 6-10mm) support material at the bottom and the finer grade material above. On single-grade media beds, the finer grade media bed depth ranges between 1and 1.2m and the support layer is 15-20% of the bed depth. On multi-grade beds, the media is typically graded in 5 or 6 layers between 10mm gravel and finer sand/glass as described above.

Over a period of time in operation, the media can deteriorate and should be regularly inspected (at least annually) to ensure optimum filtration efficiency.