Detailed instructions for installation are provided with every purchase.


The King Water Saver comes with an Installation Guide outlining contents, instructions and wiring diagram.

DIY purchasers of the King Water Saver should have no problems following the guide. If in doubt though, contact us. For the less confident, use professional help. In the vast majority of cases the installation is completely straightforward and should take between an hour and ninety minutes to complete.

Some John Guest Speedfit® adaptors have been supplied with the King Water Saver for 12mm piping. If you do not have 12mm plumbing you will need to obtain the correct adaptors suitable for your system through your plumbing outlet.

Check the contents of your King Water Saver and familiarise yourself with the wiring diagram in the Installation Guide supplied in your package.

Mount the King Water Saver electronic box in a convenient location, either on display or out of sight. Cross brackets are supplied if you wish to attach to a wall.

Plug the loom into the King Water Saver electronic box and arrange your wiring to fit your electrical system layout.

Install a T-Section to the hot water line at the base of your tap furthest from your hot water supply. Run a pipe from this T-Section and connect to the King Water Saver valve making sure the arrow on the valve is pointed in the direction of water flow. From the valve, run a line to your water source.

The solenoid valve has already been connected to the loom and is ready for connection into your hot water return line.

Plug the temperature sensor into the top of the second T-Section. This should be placed after the valve. Attach the flow sensor as close as practical to your hot water heater on the cold feeder line into the hot water source.

To complete installation, connect the red wire to 12v power + and the black wire to earth. Test your King Water Saver. If you are still unsure about how the system operates, see How it Works or read the Frequently Asked Questions.