What is the difference between the mc7 and mc1? i have an rcc7 unit that i purchased 2 years ago

Hi Gregory, the the difference between the two membranes is the gallons per day produced; the MC1 will fill the ro storage tank a just a couple minutes quicker than the MC7. Either membrane is compatible with the RCC7.

When should this be changed?

It should last 2 to 3 years. However, I use a TDS meter to monitor pollutant levels. The water in Alpine, TX is not very good according to the TDS readings. I change my RO membrane twice a year and the other filters about every 3 months. I am probably a bit of a fanatic though. Check out 123filter.com for filter information. I stopped buying from Amazon because I got a better price and their customer service is awesome. Amazon customer service is excellent but 123filter is in the RO business. Very helpful for problem solving.

Are there any specific instructions? Do you have to run water through it awhile before using?

There will be specific instructions but in any case it is always a good idea to flush the system few a few minutes before using. The important thing is to keep the membrane wet. Tech support at isptings is awesome too.

Will this fit ispring rcc7ak?

Hi Elizabeth, Thank you for your question. Yes, this is the membrane filter used in the system rcc7ak. Thanks, iSpring Water Systems

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iSpring Greatwell MC7 Reverse Osmosis (RO) Membrane Replacement - 75 GPD - 11.75” X 1.75” - Fits Standard Undersink Reverse Osmosis Systems

iSpring Greatwell MC7 Reverse Osmosis (RO) Membrane Replacement - 75 GPD - 11.75” X 1.75” - Fits Standard Undersink Reverse Osmosis Systems

Product ID: 298653053

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Material
Polypropylene
Product Dimensions
44D x 44W x
Item Weight
191 g
External Testing Certification
ANSI
Product Benefits
Arsenic

💧75 GPD ultra-pure flow

🧪0.0001 micron precision filter

🛡️NSF/ANSI certified safety

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Description

💧 Elevate your hydration game with next-level purity!

PURE WATER ZERO COMPROMISE - Removes 99%+ of 1,000+ contaminants including lead, chlorine, and arsenic for crystal-clear hydration.
WARRANTY BACKED PEACE OF MIND - Activate your lifetime free tech support and manufacturer warranty for worry-free performance.
FITS SEAMLESSLY WORKS RELIABLY - Standard 11.75" x 1.75" size fits most under-sink RO systems for hassle-free upgrades.
HIGH CAPACITY DAILY CONFIDENCE - Delivers up to 75 gallons of clean water per day—perfect for busy households and health-conscious pros.
PRECISION FILTRATION AT ITS FINEST - 0.0001 micron membrane size ensures only water molecules pass through—nothing else gets in.

The iSpring Greatwell MC7 RO membrane replacement offers industry-standard sizing and NSF/ANSI certification, delivering up to 75 gallons per day of ultra-purified water by filtering out over 99% of contaminants with a 0.0001 micron membrane. Designed for easy installation in most under-sink reverse osmosis systems, it ensures safe, clean drinking water backed by lifetime tech support and warranty.

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Material	Polypropylene (PP)
Product Dimensions	44D x 44W x 298H Millimeters
Item Weight	191 g
External Testing Certification	ANSI
Product Benefits	Arsenic
Brand	iSpring
UPC	662425048120
Global Trade Identification Number	00662425048120
Net Quantity	1.0 count
Number of Items	1
Manufacturer	iSpring
Item model number	MC7
ASIN	B007TBB69W

iSpring Greatwell MC7 Reverse Osmosis (RO) Membrane Replacement - 75 GPD - 11.75” X 1.75” - Fits Standard Undersink Reverse Osmosis Systems

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