Plumbing help

[robert.smith2888]

Hi guys
I’m using 25mm pvc pipe for my return pipe and I need a hosetail spigot, what size do I buy?
25mm the size of the pipe ( but the internal diameter is 22mm

or
20mm and when you solvent weld it joins it?
thanks in advance

 

[robert.smith2888]

Or do I need it to be a female fitting ?