Review on Hydrotech 41400008 41400009 Replacement Cartridge: Quality filtration for improved performance by Samiran Pusarla

Finally found a suitable source for these filters. The original water treatment company that installed my I/O filtration system at a very high cost thought they should keep banging every time I needed filters. A water treatment company that provided inexpensive filters closed when the owner retired. The only problem was confirming that these are the correct filters for my Hydrotech built system. At some point since my installation twenty years ago, Hydrotech renumbered the filters, although the filters themselves have remained the same. It was difficult to find Hyrothech's phone number, but once I found the tech support phone number, I quickly contacted a tech at the Co-op who was able to confirm the filter numbers I needed. Hydrotech has an opportunity to make their system owners much happier if they post customer contact information on their company website and post a cross reference table that maps old filter numbers to new filter numbers.