Manifold upside down? New plumber!

[SLyons]

Hello. I need some quick advice I hope! The plumber who is doing our extension, different from our original plumber, has said this isn’t right and needs changing? Any advice really appreciated. Thank you

 

[SLyons]

Sorry I should add these are under a set of stairs, in a barn, that go up to our house. He said something about the air not being able to escape. Why would they put it in incorrectly?! It’s been in about ten years now.

 

[ShaunCorbs]

It's fine he's right in terms of airing them it makes it more difficult but still doable

 

[SLyons]

It's fine he's right in terms of airing them it makes it more difficult but still doable

Sorry, so they don’t need replacing?

 

[ShaunCorbs]

Sorry, so they don’t need replacing?

No aslong as nothing's wrong / broken / not working ?