✔CO2 DIY aquarium generators system kit: Well-sealed caps and pipes, leak-proof, non-deformed, never loose.
✔Bubble counter with check valve: Flow-rate of CO2 gas indication device and prevent water flow back into the bottle.
✔Solenoid valve: To control the on and off of CO2 generator system using with a timer(not included).
✔Equipped with a safety valve, the pressure is greater than 4kg pressure will relief automatically, carbonated beverage bottle pressure is 8kg, safety is ensured.
✔The safety valve supports manual pressure relief. When the pressure is below 4kg, it can be manually relieved by pull the ring of the safety valve. It is very safe.