Kenmore UltraFilter/ Whirlpool Compatible TW30-1810-36 TFC Membrane This is actually a Reverse Osmosis TFC membrane that will go with the Kenmore UltraFilter 150, 300, 350 and also 500 R.O. bodies. This membrane will likewise fit the Whirlpool WHER12 R.O. system. The appropriate pre and also post filters are actually the WSK-1 filter set. This TFC membrane will lessen all complete diffused solids off your alcohol consumption water. Assumed membrane life is actually 2 to 4 years, with annual filter changes.