Accessing a toilet cistern concealed behind a wall that's been tiled

My leaky toilet cistern is behind a wall, which has tiles all over it. The only access is via a shelf above it that can open up. However it's very difficult to get access to the bottom of the cistern. How best to do this in order to fix the leak at the bottom of the cistern? Thanks

Asked by Martin on 11th Jun 2026
Expert Trade Answers
Best Answer
"Is it a back to wall toilet? You may get better access to the bottom by removing the toilet first. Unfortunately is a awkward job either way"
Answered on 11th Jun 2026 - Member since Apr 2025 - report
"Remove the toilet and get access throigh the space"
Answered on 15th Jul 2026 - Member since Feb 2017 - report
"You can try to access it from the behind the wall if there is plastered only as the plaster part would be easier to be repaired."
Answered on 2nd Jul 2026 - Member since Aug 2024 - report
"There is no easy fix to this.. if the leak is at the bottom of the cistern, you will need access to the bottom of the cistern in order to execute any repairs.."
Answered on 17th Jun 2026 - Member since Nov 2022 - report
"tough one without seeing what the set up is. might be easier to remove the toilet pan and access it that way?"
Answered on 22nd Jun 2026 - Member since Oct 2025 - report
"Concealed cisterns can be a real pain when they weren't designed with maintenance in mind. Before thinking about removing tiles, I'd try to establish exactly where the leak is coming from."
Answered on 23rd Jul 2026 - Member since Feb 2026 - report
"Cut the grout lines of the tiled area that needs to be removed including the back panel.
Use a multi tool with a grout removal blade.
Once the repair is done stick some timber to the inside of the panel either side where the tiles were with some instant grab adhesive.
Once dry stick the panel & tiles you took out & Once dry re grout the grout lines.
Job done
Hope that helps

Regards Martin
HBB Property Services"
Answered on 11th Jun 2026 - Member since May 2017 - report
"That the only way unless you take tiles off they hard to do sometimes you do have to take it all apart"
Answered on 11th Jun 2026 - Member since Dec 2025 - report
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