thegil
Member
simple engineering and physics mate! healthy for keeping the brain active 👍Erm yes. They are Israeli river rocks and the water comes up to the top of them above the patio. Next to the brick is a Torbeck cistern valve connected to mains water. When the water level gets too low the valve opens and lets more water in. When it rains the overflow comes out of the pipe below it. In the cistern box there is a chlorine block which keeps the water clear.
Unbelievably some people say I over think things 🤔😆