These are great check valves for aquarium air pump. They can prevent the water in aquarium from flowing to the air pump.

Description:

• Great one way check valve for aquarium air pump
• Protect you air pump by preventing aquarium water from back siphoning during a power outage.
• Small and compact
• Made of durable plastic
• It's easy to install
• Compatible with standard aquarium air pipe of 4mm inner diameter
• Full Length: Approx. 5.3cm(2.1 inch)
• Color: Red

Package Includes:

• 10 x one way check valve

Keywords: Air pump valve?? aquarium?? valve?? check valve