Hi, Thank you for contacting SharkBite. We are sorry to hear about your experience with SharkBite 3/4 in. x 1/2 in. x 1/2 in. Push-to-Connect Brass Reducing Tee. The SharkBite 3/4 in. x 1/2 in. x 1/2 in. Push-to-Connect Brass Reducing Tee is measured in CTS (copper tube size). The product has only been tested and approved to work on the following pipes. PEX (ASTM F876, CSA B137.5) Copper (ASTM B 88) CPVC (ASTM D 2846, CSA B137.6) PE-RT (ASTM F 2769) HDPE (SDR-9 ASTM D2737). If you were connecting the tee to any other types of pipes it may not work. We appreciate your feedback and if you have any more questions on the product you can call tech support at 877-700-4242. Kind regards,