Culligan S1A Whole House Standard Water Filter Cartridge, 20 Micron, 16,000 Gall
Compatible with Culligan model HF-150A, HF-160, HF-360A, and HF-365. – Level 2 Basic Filtration. – The HF-150A is tested and certified by WQA against NSF/ANSI Standard 42 for materials safety and structural integrity only.