Side-feed float valve (servo-valve).
Specifications:
- Very quiet work: 23 dBa;
- Water level regulated by a 3/8" Inch screw brass nozzle;
- Filling speed: 6 litres in 38 seconds (at 3 bar pressure);
- Fits most of the toilet tanks.
Flush phases:
1 - the float moves along the valve body;
2 - as the tank fills, the float rises and closes the valve head;
3 - the pressure increases to given amount - valve is closed.