⭐ Key Features

•A 50 GPD thin film composite reverse osmosis membrane in the standard 1812 format, fitting the MF-4009, TFC-35 and MA-4202 position. The original in that position is rated 35 gallons per day, so this is an upgrade rather than a like for like swap.

•The extra output is what you notice. A 50 GPD membrane refills the storage tank faster than the 35 GPD it replaces, which shows up as a faucet that keeps running rather than trailing off partway through filling a jug. It fits the same housing with no modification.

•The membrane is the stage that does the actual reverse osmosis. Under line pressure it reduces total dissolved solids, which separates it from the cartridges around it: sediment and carbon capture things and hold them, the membrane separates them and sends the concentrate to drain.

•Change your carbon prefilter on schedule and this membrane will last far longer. Chlorine attacks the thin film composite material a membrane is made from, and it is the single thing that shortens membrane life fastest. A tired carbon stage lets chlorine through and quietly damages the expensive part.

•This is the membrane only, not a kit: no prefilters, housing, storage tank or faucet. A membrane runs one to two years against six months for the cartridges around it. Flush a new one for several minutes before using the water. CFS is an independent brand, a compatible replacement and not an OEM part.

🛠️ Specifications

• Brand : CFS
• Material : Carbon Fiber
• Unit : 1 Count
• Color : Blue
• Item highlights : Fits the MF-4009, TFC-35 and MA-4202 position in PT-4 systems. 50 GPD, higher output than the 35 GPD original.
• Number of items : 1
• Package quantity : 1
• Product benefit : Reduces TDS
• Type : POTABLE_WATER_FILTER
• Item dimensions : H: 11.7 / L: 1.7 / W: 1.7 (Weight: 0.28)
• Package dimensions : H: 1.9 / L: 13.3 / W: 4.8 (Weight: 0.46)

📋 Product Description

CFS 50 GPD thin film composite reverse osmosis membrane in the standard 1812 format, fitting the MF-4009, TFC-35 and MA-4202 position. Worth being clear about what this is: the original membrane in that position is rated at 35 gallons per day, and this one is rated at 50, so it is an upgrade rather than a like for like replacement. It fits the same housing with no modification. The extra output is what you actually notice day to day. A reverse osmosis system does not produce water on demand; it fills a small storage tank slowly and the faucet draws from that. A 50 GPD membrane refills that tank faster than the 35 GPD it replaces, which shows up as a faucet that keeps running rather than trailing off partway through filling a jug or a kettle. On a household that draws a lot of drinking water, that is the difference between the system keeping up and not. The membrane is the stage that does the actual reverse osmosis, and that is worth understanding. Under line pressure, water is forced through a semi-permeable film that passes water molecules and rejects most of the dissolved solids carried with them. That is a different mechanism from the cartridges around it: sediment and carbon capture things and hold them, while the membrane separates them and sends the concentrate to drain. Protecting it comes down to the carbon stage ahead of it. Chlorine attacks the thin film composite material a membrane is made from, and it is the single thing that shortens membrane life fastest. A carbon prefilter left in too long stops holding chlorine back, and the damage that follows happens quietly: no dramatic failure, just a membrane that stops rejecting as much as it should. Changing the carbon on schedule is the cheapest insurance on the most expensive part of the system. This is the membrane only. It does not include the prefilters, the housing, the storage tank or the faucet. A membrane normally runs one to two years against about six months for the cartridges around it. Flush a new membrane for several minutes before using the water, which clears the preservative used in manufacturing. CFS is an independent brand and this is a compatible replacement, not an original manufacturer part.