http://www.waterfilters.net/Culligan-US-EZ-4-Under-Sink-Filter-System.html
The Culligan US-EZ-4 is designed for installation under the sink to improve water quality.
It produces healthier, better-tasting drinking and cooking water and features an easy twist-on, twist-off filter cartridge and quick-connect fittings for easy installation. The US-EZ-4 is NSF Certified.
