Connecting Grohe shower using adapters to 15 mm supply

[ShaunCorbs]

No fibre washer is fine on it’s own

 

[Ben-gee]

As above just use the fibre washer.
Do it up nice and tight then turn the water back on. If there is a slight drip from either hot or cold just leave it for a while, the fibre washer will swell slightly and become watertight.

 

[Stants]

No fibre washer is fine on it’s own

No fibre washer is fine on it’s own

OK thankyou

 

[Stants]

OK thankyou

As above just use the fibre washer.
Do it up nice and tight then turn the water back on. If there is a slight drip from either hot or cold just leave it for a while, the fibre washer will swell slightly and become watertight.

Thankyou for your advise and help