I bought this for a 5 stage Ultima VII filter. The advantage was that it contained one of the filters that is not standard in the Ultima package. I encountered a problem. This nifty filter was designed for 1/2 lines, and my system is 3/4 lines. It didn't fit. I was ready to return but the company sent me a kit with hose and fittings and refunded me the converters. I managed to get the system working. I appreciate the extra effort the company went to to help me with the installation.
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