AquaOne Airline Check Valve x1
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AquaOne Airline Check Valve (1 Pack)
AquaOne Airline Check Valve - connect a check valve (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.
At a glance:
Small and Compact
Fits standard aquarium air-line 4mm inner diameter
Allows air to travel in one direction only.
Stops water coming back down the air tube
Easy to install - just cut the airline between the air stone and the air pump and insert check valve into air line
Aqua One Part number - 10121