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

Details

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

💧75 GPD high flow rate

🧪0.0001 micron ultra-fine filtration

🛡️NSF/ANSI certified safety

€ 38.08

Duties & taxes included

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Sold byAmazon NetherlandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Elevate your hydration game with the ultimate RO membrane upgrade!

SEAMLESS COMPATIBILITY - Standard 11.75” x 1.75” size fits most under-sink RO systems—upgrade your setup without hassle.
CONFIDENCE IN EVERY DROP - Backed by NSF certification and lifetime tech support, plus easy warranty registration for peace of mind.
ENGINEERED FOR EFFICIENCY - Delivers up to 75 gallons per day, perfect for busy households craving fresh water on demand.
PURE WATER ZERO COMPROMISE - Removes 99%+ of 1,000+ contaminants including lead, chlorine & fluoride for crystal-clear hydration.
PRECISION FILTRATION TECHNOLOGY - 0.0001 micron membrane size ensures only water molecules pass, blocking harmful impurities with 97% TDS rejection.

The iSpring Greatwell MC7 RO membrane replacement offers a robust 75 gallons per day capacity with ultra-fine 0.0001 micron filtration, removing over 99% of contaminants including lead and chlorine. Certified to NSF/ANSI standards, it fits standard under-sink RO systems and ensures safe, clean water with reliable performance backed by lifetime support.

Specifications

ASIN	B007TBB69W
Best Sellers Rank	#198,076 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #1,701 in Water Purifier Accessories
Brand	iSpring
Customer Reviews	4.7 4.7 out of 5 stars (2,120)
EU Spare Part Availability Duration	3 Years
Enclosure Material	Polypropylene (PP)
External Testing Certification	ANSI
Global Trade Identification Number	00662425048120
Importer Contact Information	ATM RETAIL 1st Floor Beside P and T Building Lakdi Ka Pul Hyderabad Telangana 500004
Included Components	RO membrane
Item Dimensions D x W x H	44D x 44W x 298H Millimeters
Item Type Name	, 75 GPD, 11.75” X 1.75”
Item Weight	191 g
Manufacturer	iSpring
Manufacturer Part Number	MC7
Model number	MC7
Number of Items	1
Number of Packs	1
Product Benefits	Arsenic
Set Name	ISPK011
UPC	662425048120
Unit Count	1.0 Count

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