I was replacing my kitchen faucet when I ran into an issue that I didn't foresee (yes, this is my fault for not looking ahead!). The supply lines attached to the faucet and the supply lines coming from the angle stop do not connect together (two female ends) and are of different sizes. The water supply lines have 1/2 inch female connectors and the lines coming from the faucet have 3/8 inch female connectors. What's more, the supply lines from the angle stop are crimped to the stop and can't be easily removed.
Now, what I would like to do is connect these supply tubes to each other because there is not an easy way for me to replace the stops, uncrimp the water supply lines, or remove or replace the faucet supply lines.
I believe my question is similar to this one.
Unfortunately, I am unsure of the appropriate diameters to consider when purchasing something because I do not know if the connectors on my lines are NPT (taper) threaded or compression (parallel) threaded.
I have seen there are adapters like compression unions and reducing nipples, but I am unsure of which kind to buy or if there are any for my situation. Another idea I had was to join the two lines using another angle stop, such as the one below, but I am also unsure if that would work or even be a sound solution.