Can I use taps and thermostatic shower valves bought in the UK and use them in spain or are the threads different.

It should fit. Usually it is 1/2 IP size tread or 5/8" O.D. copper tubing. If it is not, you can always get a reducer ( or increaser) to bring the pipe to the configuration of your new taps. Back to you. Milo

Can I use taps and thermostatic shower valves bought in the UK and use them in spain or are the threads different.
If your fitting has metric threads there's a adapter,(see image) to convert to IPS. Good luck, Tom