Can prevent the aquarium from the water flowing back, which is caused by the decrease of CO2 pressure and keep the function and service life of CO2 bottle
When used in the Ozone generator, it can prevent the Ozone from flowing back to the air pump and eroding the propeller
It can protect the power head from the water flowing back which is caused by power cut.
Fits standard aquarium CO2 pipe(4mm) internal diameter.
Material: Stainless steel.
B&K Stainless Steel One Way Check Valve Non-Return Air CO2 Line 4/6mm Tubing Regulator Diffuser in Aquarium System