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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MC7

Product ID: 3671861

Details

External Testing Certification
ANSI
Item Weight
0.15 kg
Material
Polypropylene
Product Dimensions
1.75"D x x

💧75 GPD water output

🔬0.0001 micron filtration

🛡️NSF/ANSI certified safety

Fr 94

Duties & taxes included

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Description

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

LIFETIME SUPPORT - Register for warranty and enjoy free lifetime tech support—because clean water is non-negotiable.
FITS LIKE A GLOVE - Standard 11.75” x 1.75” size fits most under-sink RO systems seamlessly.
HIGH CAPACITY FLOW - Delivers up to 75 gallons per day—enough for your whole household.
ULTRA PURE HYDRATION - Removes 99%+ of 1,000+ contaminants for crystal-clear water.
CERTIFIED PEACE OF MIND - NSF/ANSI tested to guarantee top-tier filtration performance.

The iSpring Greatwell MC7 Reverse Osmosis Membrane is a premium, NSF-certified filter cartridge designed to fit standard under-sink RO systems. It delivers up to 75 gallons of purified water daily by removing over 99% of contaminants including lead, chlorine, fluoride, and arsenic through its ultra-fine 0.0001 micron membrane. Engineered for durability and backed by lifetime tech support, it ensures safe, clean drinking water for modern households.

Specifications

Asin	B007TBB69W
Best Sellers Rank	#4,113 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #69 in Water Filtration & Softeners #98 in Water Coolers & Filters
Brand Name	iSpring
Customer Reviews	4.7 4.7 out of 5 stars (2,232) 4.7 out of 5 stars
External Testing Certification	ANSI
Global Trade Identification Number	00662425048120
Included Components	RO membrane
Item Dimensions D X W X H	1.75"D x 1.75"W x 11.75"H
Item Type Name	, 75 GPD, 11.75” X 1.75”
Item Weight	0.15 kg
Manufacturer	iSpring
Manufacturer Part Number	MC7
Material Type	Polypropylene (PP)
Model Number	MC7
Number Of Items	1
Number Of Packs	1
Product Benefits	Removes up to 99% of over 1,000 contaminants including lead, chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more
Set Name	75 GPD
Unit Count	1 Count
Upc	662425048120

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