Anyone help me please?
I bought a manual shower valve suitable for high and low pressure(including combi)
In the box i appear to have the wrong instructions as they are for a different diverter valve with a different template.
Also in the box are two ;what look like pressure reducers, one has a blue arrow the other has a grub screw like a service valve except it has plastic fitting inside like a check valve.
Do i fit these if i i have mains fed system and what goes where? or are they for a different unit and i dont need them?
I am also using a pressure equalising valve as this unit does not do that job.

Any thoughts?

Many thanks

Freddy