Cistern devices
You can reduce the amount of water you use to flush your toilet, with one of our easy-to-install cistern devices.
Hippo Water-Saver
The Hippo* can retain up to 2.5 litres of water with every flush.
The bag sits in the water underneath your cistern float. It is made from durable heavy gauge polyethylene and has a hole in it to allow water to circulate, preventing any stagnation.
Order a Hippo Water-Saver device
Save-a-flush
The Save-a-flush* can help you save up to one litre of water with every flush.
The bag of crystals (made from a harmless silicone gell) sits in the bottom of your toilet cistern. The bag will swell up around six hours after installation.
* Fitting instructions are available to download below.
Please remove your cistern device if your toilet does not flush properly.
Which cistern device is right for my toilet?
Please view the table below to identify which water saving device will suit your toilet.
| Cistern size | Device recommended |
|---|---|
| 9 litres and above | Hippo Water-Saver |
| 7-9 litres | Save-a-flush |
| 6 litres or less | None required |
| Cistern installed | Device recommended |
| Pre-1993 | Hippo Water-Saver |
| 1993-1999 | Save-a-flush |
| Since 1999 | None required |
| Cistern type | Device recommended |
| Large low level | Hippo Water-Saver or Save-a-flush |
| Dual flush | None required |
| Slimline | None required |
