Product review (5 stars): It was easy to install with a little pipe solvent
I bought this for my septic tank vent pipe.  It was easy to install with a little pipe solvent.  We have a pumped system and there is a lot of smell when the pump is running.  This filter eliminated the smell.  So far the original filter cartridge is still good after 8 months.  I think you need to phone the manufacturer to buy replacement cartridges.  It would be good to order on line.