http://www.waterfilters.net We demonstrate how to change a carbon block whole house water filter and give some key tips and tricks. Details include information about water filter cartridges with specific emphasis on the Pentek EP-20BB 5 micron carbon block. Aquaman also provides information about general maintenance for your whole house water filter housing with details about o-rings maintenance, proper lubrication, and use of the spanner wrench. Aquaman is a Water Quality Association Certified Water Specialist. His training and experience have given him a deep understanding of water chemistry and water purification equipment. This enables him to provide scientifically accurate information that you can trust!