We "bought" the Franke system as part of a replacement kitchen project so on its own the Franke system didn't seem that expensive BUT the cost of replacement filters from Franke is horrendous and I totally agree regarding the problems with leaking after the 2nd or 3rd cartridge replacement. An "O" ring for the cartridge container is a must but as previously stated Franke don't see the issue at all!

I had this franke triflow water filter unit fitted about two years ago. The first time I replaced the filter, things were fine, the second, I found it impossible to stop it leaking. I contacted the company asking for advice and they ignored my questions, suggesting only that I upgrade to their new stainless steel model. So I now have a useless filter system. It strikes me that it should come with an 'o' ring on the casing, but when I asked them about it, they didn't respond. I've talked to other people who have had the same problem with leaks, and the same lack of response from the company.

bought this Franke triflow system as we live in an extremely hard water area in wiltshire. We were using a brita water filter for the water in the kettle which worked great. We bought his as we thought it would save money in the long run. When installed the water just tasted like normal tap water to me (although i am not a big water connisseur saying that) What we did notice though was that the kettle seemed to be getting scaled up for a pastime using this in it, so i phoned avilion to check that this was right and was told that the filters supplied do not filter out limescale, only impurities. However they do supply one that "reduces" not "eliminates" limescale and that they were working on one that did both. I explained that this was the whole reason for me installing the system and was the filter that i originally requested, so they agreed to send me one as long as i returned the one supplied. I fitted the new limescale reducing filter, now "reducing" is a funny word, it did reduce it by a small amount, but nothing to write home about. I am by no means satisfied! In my opinion keep the cash in your back pocket and just use a brita water filter as it does it all round. M

I had a Triflow system installed about 18 months ago because the water supply goes through a salt softener. The filter tap is connected directly to the mains, however, before it reaches the softener.
The 'filtered' water has an oily scum on the surface, most noticeable when making tea or coffee, which looks disgusting. This is after taking care that the kettle is clean, cups have been rinsed after washing, etc. Since water from the other cold tap seems OK , I also made sure that the plumbing had been done correctly. The filter element is changed every six months.
I intend to stop using the filter element and to buy a Brita filter jug (which I think will also cost less than '£62).