This anti-siphon is placed directly on the outlet pipe of your air pump. It prevents water from flowing back up to the pump in the event of pump failure.
Karcher 2.643.100.0 Suction Hose With Nonreturn Valve 5M
Safety valve for aquarium air and co²tube Aqua Della
FloPlast Air Admittance Valve for Universal Waste Pipe - 32mm White
1-outlet metal air valve for aquariums Zolux
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RC-3680 - K&N Air Filter For Air Charger Intake For Harley Davidson FLD 1690 2013 - Chrome/Red
