Can the filters be returned if they dont solve the problem ?

Hi Joe,

Great question - and the answer should please you. All Stetzerizer products (filters and meter) are covered by a 60-day 100% satisfaction guarantee. If you don't like them, they don't help, you change your mind - it doesn't matter - you can return them for a full refund. You only pay the shipping costs (both ways - but this is very minimal).

We stand behind these with this rock solid guarantee because it is such a well-received product. We get very few returns.