Hello WileyDog and thank you for the comments you posted on the Moen website. We are sorry to hear that your new Moen 3857 Diverter Tub Spout with Slip Fit Connection in Chrome would not install onto the pipe outlet. The 3857 is designed to be installed on a 1/2" pipe with slip fit-CC connection. We suggest inspecting the pipe outlet to ensure no sharp edges/burrs are on end of pipe. The pipe outlet should extend 1-1/2” to 2-3/4” inches from the finished wall surface. Should you need replacement parts assistance or have any further questions, please call Moen directly at 1-800-289-6636. We are available Monday through Friday from 9:00 am – 5:30 pm Eastern Time.