Power shower water pipe size - is 15mm ok to use?

[Wenney]

Hi guys I am about to fit a power shower I have 22 mm pipe from tank to pump and then to the mixer valve my question is the mixer valve looks like the fitting from the valve to the shower head is 15mm pipe is this ok or do I need to step it up to 22 mm . Hope someone can help this is my first step in to plumbing so sorry if this sounds a bit dim.

[proptech]

HI Wenney

As long as you have used 22 to the valve, all should be OK.

[Wenney]

Thanks got quite a bit done to day so your reply came in time should be able to get started with the piping tomorrow once again thank you