How to install the Aquasana under counter drinking water filters. This video shows the correct way to install Aquasana's under counter drinking water filters, including the AQ-4600 and AQ-4601 filter systems. Our drinking filters are NSF-certified to standards 42 and 53, and offer great contaminant reduction for a great value. In addition to the provided parts, you may need an adjustable wrench and Teflon tape. Find out more on our website: http://www.aquasana.com/category.php?.... Remember that Aquasana filter systems come with a 90-day satisfaction guarantee, and a one-year warranty. If you experience problems, please give us a call! 866.662.6885.