I ordered Aquasana water filter system, without knowing about it much it turned out that it needs to be installed by professional plumber.
There were 2 companies recommended &I have chosen Bill Howe as I knew the name.
Martin came to my place, did installment, which requires 4-5 hours. He was great. Explanation was thorough how to change the filter etc. Thank you so much!
I will ask Bill Howe again after 6 month or so when I need to change filet for the first time..