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I'm planning to connect a 3M Filtrete inline water filter to my faucet, and I was wondering what size connector my Moen faucet is expecting as shown in the below photo prior to filter installation.

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The filter instructions show that it's using a 3/8" input and output line. Do these look like they are already 3/8" and ready to connect to the Filtrete system?

enter image description here

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It looks like the braided hose is connected to a 3/8" compression fitting, which is typical. You should be able to install the filter without problems. –  Edwin Dec 9 '13 at 21:17

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