Review on Premium Universal Replacement for 4 Stage Reverse Osmosis Systems by Mark Allen

The post-charcoal filter was leaking in its sealed base. All other filters fit well and installation was easy. I had to contact the seller about a leaking filter and was surprised by the quick response and hassle free replacement of the defective filter. After replacing the filter, everything was golden, there was no leak and purified water went out. Although a filter was broken, the seller quickly fixed the problem. It really is a great economical way to keep a proper filter change schedule. The price alone of many reverse osmosis filters makes this set quite justified. Add to this the responsive customer service staff, I will definitely be buying this product again in 8 months.