uxcell Universal Aquarium Non Return Check Valve 2pcs for Air Pump Airline Tube

An essential piece of equipment to safe-guard your expensive electrical air pump and also yourself.Fit One of these inline to prevent water syphoning back into your air pump causing water damage and breaking it.Protect you air pump by preventing aquarium water from back siphoning during a power outage.Place in your airline tubing between your air pump and aquarium water to prevent water returning down the air line.