Aquatop BREZA
Plastic Air Check Valves are an essential component for any aquarium air system.
Check vavles protect air pumps from damage by preventing water from siphoning back into your air pump when it is turned off or in the event of a power outage. To use, cut airline tubing between air pump and first outlet. Attach airline to each end of the check valve.
HJS-3081BK

ATP PART VLVE AIR CHECK/FLTR