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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Description

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

HIGH CAPACITY FLOW - Generates 75 gallons of clean water daily—perfect for busy households and health-conscious pros.
PRECISION ENGINEERING - 0.0001 micron membrane pore size ensures only water molecules pass through—nothing else gets in.
SEAMLESS COMPATIBILITY - Fits standard under-sink RO systems with an industry-standard 11.75" x 1.75" size for easy upgrades.
LIFETIME SUPPORT WARRANTY - Register online for peace of mind with lifetime tech support and manufacturer warranty.
PURE WATER PURE CONFIDENCE - Removes up to 99% of 1,000+ contaminants including lead, chlorine, and fluoride for crystal-clear hydration.

The iSpring Greatwell Reverse Osmosis Membrane delivers up to 75 gallons of purified water daily by removing 99% of over 1,000 contaminants including lead and chlorine. Engineered with a 0.0001 micron pore size and NSF/ANSI certified, it fits standard under-sink RO systems (11.75" x 1.75") and offers reliable, high-capacity filtration backed by lifetime tech support and warranty.

Specifications

Material	Polypropylene (PP)
Product Dimensions	1.75"D x 1.75"W x 11.75"H
External Testing Certification	ANSI
Product Benefits	Removes up to 99% of over 1,000 contaminants including lead, chlorine, fluoride, arsenic, asbestos, calcium, sodium, and more
Brand	iSpring
UPC	662425048120
Global Trade Identification Number	00662425048120
Unit Count	1.0 Count
Number of Items	1
Manufacturer	iSpring
Part Number	MC7
Item Weight	5.3 ounces
Item model number	MC7
Is Discontinued By Manufacturer	No
Size	1 Count (Pack of 1)
Color	Blue
Style	75GPD RO Filter
Item Package Quantity	1
Number Of Pieces	1
Cutting Diameter	1.8 Inches
Included Components	RO membrane
Batteries Included?	No
Batteries Required?	No
Assembled Diameter	1.8 Inches

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