JK wrote:

New house has an under-sink water filter system. The tap is a rather
nice one made by Franke and the filtration system is called Triflow. I
feel I should replace the cartridge as I have no idea how old the old
one is. Anyone know a good/cheap supplier online?

Also, does one have to fit a particular brand of filter unit, or are
they a generic size?


They are not all the same. http://www.pureflo.co.uk/ are ok. You could
always replace the cartridge type to a different one.

S.