4pcs Aquarium Check Valves for Common Air Pumps,Aquarium Air Pump Check Valves Red Clear Plastic One Way Non-Return Check Valve AquariumAir Pump Accessories for Airline Tubing Fish Tank(4mm)

Product description

4 PCS Aquarium Air Pump Check Valves Red Clear Plastic One Way Non-Return Check Valve for Fish Tank

Specification:
Material: plastic
Color: Red and transparency
Size: Air Hole Diameter: 4mm/0.16inch, Length:5.3cm/2.1inches, Height:1.35cm/0.53inches.

Quantity: 4pcs
Descriptions:
Protect you air pump by preventing aquarium water from back siphoning during a power outage.
Proper size for universal air pump, fish tank, aquarium, fishing tackle shop, etc.
Made of high quality Plastic material, not easy to aging, sturdy and durable. Detachable design makes it easier for you to unscrew, clean and repair.
4pcs one way non-return valves, which are enough for daily use and replacement.

Warm tips:
Please check if install correctly.
One check valve is required for each outlet, and two for double-head pumps, and so on.
Please use a paperclip to poke it from Input side to Ouput side when the outlet inside gets stuck.