For serious world travellers and those who need to treat water daily, month after month, the Katadyn Pocket Filter is by far the best unit we looked at as it has an incredibly long service life of 50,000 litres, which results in unbeatable running costs. So yes, you have to pay a lot of money up front, but if you use this regularly enough, it’s excellent value in the long term. The flow rate is great at 1 litre per minute. There is a good set of features that include an inlet pipe with an impressive pre-filter and a good float. There’s no chemical taste from the water, and the quality of manufacture is outstanding – indeed, the unit is supported by a 20-year warranty. But it’s heavy at 520g and of course it’s a big cash outlay if you aren’t going to be using it regularly. Surprisingly, for such a well-designed product, the outflow pipe is rather basic and can’t easily be attached easily to standard water bottles. If you suspect viruses are in the water, you’ll need additional Micropur (chlorine) tablets at around £13.
Filter type 0.0002mm filter, silver
Replacement cartridge £180
Effectiveness bacteria, parasites (viruses with additional Micropur (chlorine) not provided)
Flow rate 1 litre per minute
Service life 50,000 litres
Packed size 24x6cm
Running costs 1 litre = 0.6p up to 50,000 litres; 1 litre = 0.36p over 50,000 litres
Made in Switzerland
Number stores in the UK 50
Stockist details – tel. (01524) 822084; www.katadyn.com
The Katadyn Pocket Filter is the best filter in our test for regular high-volume use, but for many walkers it’s probably more performance than they’ll need.
Review by Graham Thompson
First published in Trail magazine June 2011