What is this Pool Part and do you have it

I have (2) questions?

My first question is do you have the part in the photo and/or substitute that can do the same thing. it is 1" 1/2 in measurement. I am not talking about the PVC elbow, but the other screw-on thing (sorry but I don’t know the name of it).

My second question is it even important to have the same exact thing or can I buy a substitute from any place that sell PVC plumbing stuff (e.i. mernards, Lowes, Home Depot).

Eforestal55 the part you are needing is an 1-1/2" union. You can purchase the item at lowes or Home Depot.