Heavy toilet cistern

I have a mid rise (Very heavy) cistern that needs to be fitted to a tiled plaster boarded wall. There are no battens to fix it to where it needs to go and the wall behind that is very old disintegrating brick, so I was wondering what sort of weight would be safe to hang to the wall and what fixings would be best If it it possible to do?
Many thanks.

Asked by Joe on 6th Sep 2021
Expert Trade Answers
"20kg and using drywall plugs and screws, and for extra security, I'd use no nails behind the cistern for extra strength."
Answered on 17th Oct 2021 - Member since Oct 2021 - report
"I would usually go back to the brick with plugs and long screws, and sometimes seal the wall with PVA, before adding a plasterboard to the wall."
Answered on 8th Oct 2021 - Member since Jan 2020 - report
""Grip it" brown colour can hold up to 90kg just make sure you drill the holes in the correct spot as u need to be accurate"
Answered on 6th Dec 2021 - Member since Nov 2021 - report
"Hi, I've had issues like this a few times. The best way is to mark the footprint of the cistern on the wall and carefully remove as many tiles as you can that won't be seen once it's installed. This will enable you to remove the plasterboard and see the brick. You can now fix a piece of material, 18mm ply is best, to any good brick as opposed to mortar. Use a percussion drill rather than sds as they're less aggressive. You should now be able to patch back up and have a solid base for fixings. It's a faf no doubt but has got me out of trouble before."
Answered on 6th Sep 2021 - Member since Aug 2021 - report
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