While you wait for answers, we may have found some information which could help you.
Click here for Hot Turned ColdGainsborough 8.5 se hot/ cold water problems ?
How can I fix my Gainsborough ps1200 shower???
gainsborough sv 800?
Gainsborough 2000x shower?
what KW is my Gainsborough ps1200 power shower as I need to replace it? Any?
Gainsborough 8.5e ?