Compatible Water Purifier Models iSpring RCC7. Manufacturer iSpring. 1 NSF Certified. 3 FT15 Carbon Water Filter. Unit Count 1.0 Count. Style 1-Year Filter Set. External Testing Certification ANSI. CLEAN, SAFE, GREAT-TASTING WATER – Enjoy pure, refreshing water straight from your faucet, with crystal-clear ice cubes, fresher tea and coffee, better-tasting food, and healthier baby formula—better than most bottled water.