Toilet Fill Problem

[Pirate]

Learn how to solder.  
Rather easy.
Clean tubing
Apply flux
Assemble fitting
Apply heat, until fitting is hot enough to melt solder touched to the joint. Joint will suck up solder
Wipe excess off while hot

Soldering as well as many other things, can be done by anyone. Just have to learn how.  U Tube is your friend. Ask and you shall learn.

[chips ahoy]

Pirate is correct
Cleaning is the most important point,clean both pipe and fitting before applying flux.

Mel