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A standard 1812-size, 75 GPD thin-film composite (TFC) reverse osmosis membrane — the like-for-like replacement for most 5-stage under-sink RO systems.
The TW-1812-75 is a 75 GPD RO membrane in the standard 1812 size — the rating that comes in many 5- and 6-stage under-sink reverse osmosis systems. It reduces dissolved solids such as salts, fluoride, nitrates and heavy metals that sediment and carbon filters can’t catch.
Replace like for like when your RO water’s TDS starts to climb or the tank fills slowly with fresh pre-filters. Want faster refills? A 100 GPD membrane fits the same housing — see the compatibility list below.
*Typical ranges for residential TFC membranes — membrane-technology reference data, not a certified per-unit claim. Actual results depend on water quality, pressure, temperature, membrane condition and pre-filtration.
The My Water Club membrane range. 1812 and 2012 sizes fit the same standard residential membrane housing. Your current membrane is highlighted — tap any other to view it.
*Rated output = GPD ÷ 24 at lab conditions (about 77 °F, 60 psi, low-TDS water). Real-world output is typically lower, especially with cold water or low pressure.
All RO membranes → · Countertop RO systems → · Under-sink RO replacement sets →
What “75 GPD” means. It’s the rated output at lab conditions (about 77 °F, 60 psi, low-TDS water) — about 3.1 gallons per hour. Real output is usually lower, especially with cold water or low pressure.
Keep the same restrictor when you replace a 75 GPD membrane with this one. Moving up to 100 GPD or more? Change the restrictor too.
Pre-filters protect the membrane. Sediment and carbon stages must come first — chlorine and chloramine damage TFC membranes. Change the pre-filters on schedule (usually every 6–12 months).
TW-1812-75 is a standard 1812 TFC membrane rated 75 GPD. It fits the systems below and can replace the same-size 75 GPD membranes listed after them.*
Also searched as: MC7 · TW30-1812-75 · BW60-1812-75 · MEM-ES-75 · TF-1812-75 · W-1812-75 · ROULP-1812-75 · 75 gpd ro membrane 1812 · under sink ro membrane replacement
Check before you order. A standard residential membrane is about 1.75″–1.8″ across and 11.75″–12″ long, with a brine seal near one end and O-rings on the center tube. It sits in a separate membrane housing with a screw-off cap. Twist-in, capsule-style and one-piece manifold membranes are a different design and won’t fit. Not sure? Send us a photo of your old membrane label and we’ll confirm the fit.
Changing the GPD? Match the drain-line flow restrictor to the new membrane rating, or the system will waste too much water (restrictor too large) or the membrane will foul early (too small).
Will it replace the iSpring MC7 in my RCC7?
Yes. Both are standard 1812 TFC membranes rated 75 GPD, so it fits the RCC7 membrane housing with the same flow restrictor.
Does it replace a FilmTec TW30-1812-75 or BW60-1812-75?
Yes — the same 1812 format and 75 GPD rating. It is a My Water Club membrane, not made by FilmTec.
My system came with an 80 GPD membrane (CSM RE1812-80, LG TWRO-1812-80). Is 75 GPD OK?
Yes. The size is the same and 75 vs 80 GPD is within normal restrictor tolerance.
Can I upgrade to 100 GPD?
Yes, in the same housing — change the drain-line flow restrictor to a 100 GPD one and make sure your water pressure is at least about 50–60 psi.
Does it fit a Pentair† TLC-75 system or a twist-in RO?
Systems that use the TLC-75 take a standard 1812 membrane, so it fits. Twist-in and capsule-style systems use their own cartridges and won’t take it.
† Pentair® is a registered trademark of Pentair. My Water Club is not affiliated with, sponsored by or endorsed by Pentair. The name is used only to identify membranes of the same size and rating.
* APEC, AXEON, CSM, Express Water, FilmTec, Global Water, iSpring, LG, Membrane Solutions, US Water Systems and Watts, and their model names, are trademarks of their respective owners. My Water Club is not affiliated with, sponsored by or endorsed by these companies, and this membrane is not made by them. Brand and model names are used only to identify systems this membrane fits and the same-size membranes it can replace. Compatibility is based on the standard residential membrane size; please check your housing before ordering.
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 12 × 2 × 2 in |
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