6L toilet cistern to bigger sized

I have a standard traditional handle flush toilet that has a 6L cistern attached. I need to change this to a bigger 9L or higher version as not enough water to get rid of my waste so drain keeps getting blocked as it's just letting the waste sit in the pipes

Asked by Deborah on 30th Jan 2025
Expert Trade Answers
"Hi yes you can get cisterns that hold 8 litres, older high level cisterns held more water up to 13 litres."
Answered on 30th Jan 2025 - Member since Dec 2024 - report
"You won’t be able to buy a brand new cistern that is more than 6 litres because of the rules in:
The Water Supply (Water Fittings) Regulations 1999.

If 6 litres isn’t enough to flush away the waste from your toilet, it could be that the flush isn’t powerful enough, efficient enough, or the flush mechanism is faulty or broken."
Answered on 30th Jan 2025 - Member since Jun 2024 - report
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