75 GPD RO Membrane — Standard 1812 Size Replacement
75 GPD RO Membrane — Standard 1812 Size Replacement
75 GPD RO Membrane — Standard 1812 Size Replacement
The RO membrane is the core filtration stage in a reverse osmosis system. This 75 GPD thin-film composite (TFC) membrane is a standard replacement for most household under-sink RO systems using a 1812-format membrane housing.
Best for:
- Existing RO system owners replacing a worn or aging membrane
- Anyone whose TDS output readings have been rising despite recent filter changes
- Homeowners on a 2–3 year membrane replacement schedule
Key benefits:
- Standard 1812 format (11" x 1.8") fits most major under-sink RO brands
- Thin-film composite (TFC) construction
- 75 gallons per day (GPD) output under standard test conditions
- Replacing the membrane on schedule helps maintain system output and water quality
Compatibility:
Fits most standard 5-stage under-sink RO systems using an 11" x 1.8" membrane housing (1812 format). Compatible brands typically include APEC, iSpring, Express Water, Home Master, and Watts. Always verify your system’s membrane housing size and GPD rating before ordering.
What’s included:
1 x 75 GPD TFC RO membrane
Replacement schedule:
General guidance — every 2–3 years, or when TDS output readings rise noticeably. Use a TDS meter to monitor performance over time.
Installation notes:
DIY-friendly. Requires depressurizing the system and draining the storage tank before replacement. Most experienced DIYers complete this in 15–30 minutes.
If you are responding to a local utility notice or boil-water advisory, follow your local utility or health department’s official instructions first.
Certification and contaminant reduction claims depend on manufacturer documentation for the specific product.
Frequently Asked Questions:
How do I know if my membrane needs replacing?
Rising TDS readings in your RO output water are the most common indicator.
What does 75 GPD mean?
Gallons per day — the rate at which the membrane produces filtered water under standard test conditions.
Is this compatible with my system?
Check your system’s membrane housing size (1812 format, 11" x 1.8") before ordering.
Do I need a TDS meter to test my membrane?
Not required, but recommended. We carry TDS meters in our store.
Does this membrane have NSF certification?
Certification depends on the specific manufacturer documentation. Verify before purchase.
What if I received a water notice?
Follow your utility or health department’s official instructions first.