Useful products

Is multi stage filtration process secured? I had this question to Santevia Tech team.I also visited your store some times back but I couldn't convinced by your team.My question were not answered till the time.Online shop where I assured by team that if Fluoride Filter of my equipment failed ,no water filter can perform at
this level of offer what i have..
Ok fine ,this was a great deal.Gravity water system installed by local store three months back
Very difficult these days to allow outsiders to enter home.But they were well equipped so that is fine.
Problem is just after frequent interval I will have to change filter .