Aqua One Airline Check Valve 1 Pack

Connect a check (one-way) valve to airline tubing toprevent water back-siphoning down your airline when there is a power outage.Back-siphoning is extremely dangerous and can ruin your air pump, empty youraquarium, damage your floors and create a shock hazard.

Small and Compact

Fits standard aquarium airline 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

Tips:

Ensure a check Valve is used whenever an air pump ispositioned at or below the waterline of the aquarium to prevent back-siphoning.