Vertex PT 4.0 RO Filter Replacement Kit with Membrane

Filter Replacement Kit with Membrane for Vertex PT-4.0, PT-4.0/P, and PT-4.0/PP Reverse Osmosis System INCLUDES: STAGE 1 - 1x Sediment Pre-Filter (93023) - Replace every 6-12 months or as needed STAGE 2 - 1x Carbon Block Pre-Filter (OMB934-10m) - Replace every 6-12 months or as needed STAGE 3 - 1x RO Membrane TFC 35 GPD (200358) - Replace every 24 months STAGE 4 - 1x Inline Carbon GAC Post Filter 2" x 10" (CL10ROT33-BB) - Replace every 6-12 months or as needed *Filters may need to be replaced more often than indicated depending on water contaminant levels and volume of water being treated.