www.waterfilters.net/GE-FX12M-Reverse-Osmosis-Membrane.html The GE FX12M RO Membrane produces healthier, better-tasting drinking water and cooking water and improves the flavor of hot and cold beverages including coffee, tea, and juices. The GE SmartWater FX12M Membrane is a thin film polyamid reverse osmosis membrane. The GE SmartWater FX12M Membrane should be replaced approximately every 2 years. The GE FX12M RO Membrane includes the GE WS03X10016 Flow Control and the GE WS03X10015 Cone Screen.