ITEM NAME:One Way Stainless Steel Check Valve For Aquarium CO2 Stainl System Air Pump V4M6 Description&Preview.When used in the Ozone generator, it can prevent the Ozone from flowing back to the air pump and eroding the propeller. It can prevent the aquarium from water flowing back, which is caused by the decrease, and keep the function and service life of Carbon dioxide bottle.
