Rich from Plumbdog Plumbing explains why plumbers don’t recommend using blue toilet cleaning cubes inside your cistern.
Called out to a leaking toilet, Rich opens the cistern to find thick blue residue and debris from cleaning cubes building up inside the system. Over time, this gunk can stop the outlet washer from sealing properly, causing the toilet to constantly leak into the bowl.
In this case, the buildup prevented the rubber outlet washer from sitting flat on the valve seat, allowing water to slowly pass through — a common cause of running toilets.
In This Video
•The hidden damage blue loo cubes can cause inside a cistern
•Why debris stops the outlet washer sealing properly
•Cleaning years of buildup out of the cistern
•Replacing the outlet washer to stop the leak
•Advice for homeowners on avoiding this issue in the future
Sometimes the only fix is removing the buildup, replacing worn parts, and flushing the system until all debris is gone.
The Result
•Cistern cleaned of blue cube residue
•Outlet washer replaced and sealed correctly
•Toilet no longer leaks or runs continuously
•Homeowner given practical advice for future maintenance
If your toilet keeps running or leaking into the bowl, blue loo cubes could be the culprit.
Location: Perth, WA
Need help with a leaking toilet or general plumbing repairs? Visit Plumbdog
