Review on Premium Universal Replacement for 4 Stage Reverse Osmosis Systems by Jarom Bulles

This filter set meets my expectations. That's all you need to rebuild a four-stage reverse osmosis system. The membrane should be changed about every 5 years. My only complaint that made me give it 4 stars instead of 5 is that the post filter is threaded instead of a quick connect type which is clearly stated in the product description. The seller should strongly consider replacing the mail filter with a fast connection type. It is very easy to change from a threaded filter to a quick change filter and not the other way around. Those unfamiliar with plumbing nomenclature will have to run to the hardware store for the necessary fittings if their current system is the quick-connect type. Next time I might just buy the parts separately to avoid the hassle of reusing threaded connectors.