you need to check at least the filters can clean/replacable or after few years you need to dispose of it... if yourr area the waterr verry dirty then you can maybe last up to 1 year then you need buy new one... but i guess is ok for 1 year you pay 300 for clean water is better than you buy bottled water outside.

you can check your water quality using a TDS meter... shoppe also got sell..