Description
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. Package Include: 5 x Check Valve; Hole Outer Diameter: 4mm; Fit Hose Dia: 4mm; One check valve for one-way outlet, two check valves for two-way outlet, ect. Place your airline tubing between your air pump and aquarium to prevent water backflow to the airline. Protect you air pump by prevent
