4MM One Way Aquarium Check Valve
The 4MM one way aquarium check valve is designed to prevent reverse water and air flow that can damage air pumps and oxygen systems. Built with durable ABS resin housing and flexible silicone rubber diaphragm, this non return valve provides reliable protection for aquariums, fish tanks, hydroponic systems, aquaculture setups, laboratory tubing, DIY pneumatic systems and water circulation projects.
Its compact inline design allows quick installation on standard 4MM air tubing while ensuring stable airflow direction control. The valve helps stop water from flowing backward into pumps during power interruptions or when the pump is positioned below water level.
Suitable for freshwater and saltwater environments, this aquarium air pump accessory offers excellent resistance against corrosion, chemicals and temperature variation for long-term use in multiple fluid and airflow applications.
Package Content
10 x 4MM One Way Check Valve
