Replacing cartridge with sand

[kelemvor]

I have decent cartridges but I need to find a better way to clean them. I saw a device where you lay the filter down in a tray and run the spray nozzle over them, plus I may need to get rid of a couple. How long are they supposed to last if cleaned twice a year? Thanks to all Dave

Twice a year? I clean my cartridge weekly during the summer and fall. Twice a week in the spring. Once a month (roughly) in the winter.

I've never had a cartridge get ruined but after about a year the "clean" filter pressure ends up about 10psi higher than the "clean" pressure was when I bought it. I replace mine roughly every 18-24 months.