This product does not meet the new low-lead criteria defined in Safe Drinking Water Act and cannot be used for
potable water applications, including for drinking and cooking. This product can be used for non-potable water applications only.
This 1" compression coupling connects two ends of 1" PEX-AL-PEX tubing together.
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On 1” compression fitting is out inside or outside dimension?
1" PEX-AL-PEX compression fittings are designed specifically for 1" PEX-AL-PEX tubing, which is manufactured to ASTM F1281 standard and has 1.26" OD and 1.03" ID, so technically, it is inside diameter.
By PexUniverse Customer Service on 10/26/2017