Hi, this is not an answer for the Grohe shower, but may give an answer to the problem of the dripping shower head,recently had a look at Aquatronics that was leaking, it, i suppose like all showers, it has a solenoid cut off,if this is not shutting off the supply, then this surely must be the reason for the leak? but the question is ? is it worth replacing the solenoid valve?,it will only be the rubber seal that is worn?, but can you get to it? or do you just get a new shower? the choice is yours !! but the easier option, and the cheapest, and quickest, may be to replace the shower? but do turn the electric off if you do decide to fix-it, otherwise it may turn you off!! STAY SAFE!!
BOB MERIFIELD, your local End it or Mend it handyman !! ha ha ha!!
July 2007