Plumbing accessories
Thanks to globalisation, most fittings and plumbing accessories manufactures are located in Asia.
Quality has been diminished but to an extent : their is hope. It's important to consult a professional before choosing a manufacturer because not all of them interpret "Lifetime guarantee" the same way.
And don't forget that China isn't next door. A back order part can considerably slow down a project and force you to revise your original choices to finish the project on time.