Top 18 Cistern Blocks
Discover the UK's favourite cistern blocks, see how shoppers rate them, and learn where you can buy them across 15 supermarkets.
9
What people say
“Love that when you're super dehydrated you can make green water with these”
“very happy with my purchase no problem with delivery will be buying online again”
Where to buy
14
What people say
“I love the purple colour as it is flushing but then water in the bottom of the bowl looks black almost as if someone very”
17
What people say
“These cistern blocks are fantastic”
