We have a Grohe shower valve and its leaking fron the bottom of the valve itself. It only leaks when the shower is running but it's quite a bit of water making the shower pressure poor.
Should I have a look inside it or do I need a plumber???
Grohe make many different types of valve so without knowing what type you have makes it difficult to be helpful without typing a book.
Grohe are good showers so this is an uncommon problem. I assume you have checked the shower hose is tight and has a washer fitted?? That is of course assuming yours has a shower hose??
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