In reply to winhill:
> (In reply to Alex Roddie)
> Alex, I surprised you didn't mention the pre-filter but then neither did rosker in their reply! It will remove larger particulates and debris from from the water, which you find even in this country. But then the Adventurer model isn't compatible with the pre-filter.
>
Rosker didn't mention the pre-filter in our reply to Alex's original review simply because it isn't an option with the particular model that Alex used. A point that you go on to make.
> I would be concerned that the UV was unable to penetrate if a pre filter wasn't used and the water wasn't clear, rendering it ineffective.
>
The SteriPen website has masses of independent lab test results, see
http://www.steripen.com/testing.html one of which tested SteriPens' ability to work with cloudy water. The recommendation is that, in cases where the only available water is cloudy or "turgid", then two doses of the purification cycle will do the trick.
> The SteriPen Classics seemed prone to taking in water and failing, which means of course that you need to carry a back-up system.
>
This is news to us as at Rosker (as the UK distributor) and, also, news to SteriPen the manufacturer. What evidence can you provide to support this claim? SteriPen are incredibly quality conscious and, globally, the returns rate is 0.5%. That's 5 out of every 1,000 sold. That's still higher than they'd want and their Tech Support team have a goal of 0%, for the obvious reason that we don't want anyone experiencing any problems whatsoever. Let’s be very clear about these returns. They're not because SteriPen has been through the 48 second or 90 seconds purification cycle and failed to purify the water; rather it's because the unit has failed to work at all. In other words, no one has been at risk because they've used a SteriPen and thought that they'd purified their water; in the few cases of problems where SteriPens did not work it was because of circuitry issues and the user would have been aware of this because of the red warning light. SteriPens have a really, really low failure rate and when one does unfortunately not work the user would be aware of this. We've had some end users complain of SteriPen's not working when they've not inserted the wand into water, which basically means that they've not read the instructions. It has to be in contact with water for the electrical circuit to be completed.
SteriPen is one of the quickest, easiest to use, lightest, and long lasting solutions available on the market. Please note the amazing 8,000 cycle capacity = over 33 years worth of use for someone using it for 3 litres of water a day going out on trips 30 days a year in total.
Ian
Rosker Ltd