A - CO2 recycling tubing
B - CO2 inlet
C - Water inlet
D - Water outlet
F - Unions
G - PH electrode
H - Calcareous material
L - Cap
M - CO2 recycling check valve
Q - CO2 recycling outlet
R - Minimum level for automatic water feeding
S - Water outlet check valve
T - O-ring
V1 – Venturi device for CO2
V2 – Venturi device for water

*with reserve of technical improvements