Replacement Components The Whirlpool® Reverse Osmosis Filtration System requires minimal maintenance to keep it performing efficiently and effectively. However, it does utilize elements that must be replaced periodically. This periodic maintenance helps the system continue providing the highest-quality water to your faucet every day. Replacement Filters Model number: WHEERF The Reverse Osmosis Filtration System filters out more contaminants than other filtration units, making it necessary to replace the filter every 6 months. Replacement Membrane Model number: WHEERM The membrane should last 1-3 years, depending on your water condition and volume of water filtered. If you notice a difference in the taste of your water, it is time to change the membrane. * Dimensions shown are for planning purposes only. For complete information, see Installation Instructions packed with product. © 2012 Ecodyne 866 986-3223  Manuals  Contact Us  Privacy  Replacement Parts  Admin  Terms ® Registered mark/TM Trademark of Whirlpool, U.S.A. Manufactured under license by Ecodyne, Woodbury, MN. All rights reserved.