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The Whirlpool WHEERM is the correct replacement RO membrane for the following water filter systems:
The Whirlpool WHEERM UltraEase RO Membrane for WHER25 is the replacement membrane for the WHER25 Reverse Osmosis System. This RO membrane filter is a thin film composite (TFC) membrane. The WHEERM has been certified and tested against NSF/ANSI standard 58 for the reduction of total dissolved solids and organic matter and has a rejection rate of 90-95%.
The Whirlpool WHEERM specifications:
This replacement membrane typically lasts a year, depending on your water's pH level and hardness. This Whirlpool membrane, also known as 129801, should be replaced after a decrease in water pressure or quality.