Description
Aqua One Airline Check Valve (2 Pack)Connect a check (one-way) valve to air line tubing to prevent water back-siphoning down your air line when there is a power outage. Back-siphoning is extremely dangerous and can ruin your air pump, empty your aquarium, damage your floors and create a shock hazard.Small and CompactFits standard aquarium air line 4mm inner diameterAllows air to travel in one direction only.Stops water coming back down the air tubeEasy to install – just cut the airline between the air stone and the air pump and insert check valve into air line
