Replacement: whole unit after one season or 4,500lt throughput.
WATER ***  TEA ***
This is a simple, in-line silverised carbon filter, among the smallest on test.
It improved the flavour of the tank water, with only a slight tang remaining and a tiny amount of aftertaste. It removed all traces of chlorine. For tea, it scored reasonably well. It mounts on two clips. Size: 308x54mm.

www.whalepumps.com

We tested the Whale Aqua Source filter as part of a test of 9 water tank treatments, which you can read here