subject: Water filtration system [print this page] A good water filtration system will be selected based on the contamination of the water. For a household system, the best first step is to have a water sample tested by a professional. The professional will list all the contaminants you are dealing with to get your source water as safe as possible. With this information, your next choice will be the improvement store, however you will need to take the time to review each system and learn their capabilities. A professional can also point you in the right direction for the best systems available based on your sample results. Some systems will use reverse osmosis while others will be cartridge based. A good cartridge filter will have multiple stages. This will require more filters but you can stagger the filters based on the contaminants needed to be removed. When using this system, the filters will need to be installed in a specific order to ensure maximum efficiency. This is important because if you have a fine particulate filter first, it will get clogged up quickly causing the rest of the system to loose efficiency. Make sure you install the cartridges correctly. While the reverse osmosis systems do not require frequent cartridge changes, some will require shutting the system off and cleaning certain components. Mounting location must also be considered when looking to purchase a new system. It's important to be able to easily access the system to service it without making a big mess.While the reverse osmosis systems do not require frequent cartridge changes, some will require shutting the system off and cleaning certain components. Mounting location must also be considered when looking to purchase a new system. It's important to be able to easily access the system to service it without making a big mess.