In a US thread on the problem with inline filters, Magnefine made the following post in 29.3.2013:
"It has been brought to our attention that there is some issues with the MagneFine In line Filter. In reply to any issue that you find I would like to advise that we warranty the product for its operation and performance.
I would also like to advise that there is a Knock Off in line filter that looks exactly like the MagneFine. This copy is Made in China and is sold on line and in some the same traditional distribution outlets, like the ones mentioned in the Forums.
Over the last 9 months we have been inundated with reports from customers that the MagneFine filter is failing or leaking between the cap and the body seam. In 99% of cases it has been the knock off filter that the customer has and not a MagneFine filter.
To identify the genuine MagneFine filter from the Knock off. Just remove the label and if the "MagneFine" name is not molded into the cap then it is the Knock off not a genuine MagneFine.
If the filter is a genuine MagneFine. I would like to offer our assistance to anyone that has an issue to contact myself at -
[email protected]"