I have a 90-degree "elbow" 1/2 (both sides) brass push-fitting installed by previous owner. I'm replacing the PEX pipe. I don't know the brand of the fitting but it is NOT SharkBite. Do all push-fittings have the exact same insertion depth for the same fitting or does it vary slightly? I have a SharkBite depth pipe gauge and marked the insertion depth on it but when I pushed into the non-SharkBite branded fitting I could not get it all the way to the insertion line that I marked. Asking those with far more experience if this is a real possibility before I test it and turn the water back on. (I've tried pushing, twisting, pulling it out and remarking a second time followed by more pushing and twisting only to be about 1/8" short of the marked line that I drew based on a SharkBite insertion tool).
I could test it but want to avoid any leak so thought I'd ask the professionals who've used multiple brands of pipe fittings before I potentially create more work and a mess in my installation.