Thefirst stage filter is 5 um PP filter which can effectively filter outthose big solid substances,suach as steel rusty,sand and stone etc.
Thesecond stage filter is GAC which can adsorp the cholorineremains,humous matter,by=product of sterilization,bad smell,lolour wateretc.
The third stage filter is 1 um
PP filter which can further reduce the granule substance and protect the RO membrane.
Theforth stage filter is RO membrane which can effectively filter away thebacteria,virus,heavy metal ion and pesticide remains.because themembrane hole size is 0.0001um(0.1nm).it means a bacteria or adisseminating virus cannot pass through until the former is able todownsize 4000 times and the latter is capable of contracting 200 times.
The fifth stage filter is T33 filter which can make the pure water fresh and tasted well. )
4. water lack alarm system to remind user.
5. Indicator showing the working status by digital "8" shape.