Aquarium Air Pump for Freshwater and Saltwater Aquariums Precise Reliable and Easy to Install
★★★★★4.95,185 ratings|6K+ sold
$14.99 USD
Quantity
This Fish Aquarium Air Pump Check Valve is made of tough plastic and will keep aquarium water from back siphoning during a power outage, protecting the air pump. On the oxygen pump, this check valve prevents the tracheal tube from collapsing. It is small in size, making installation easier.
Features:
Color: Red
Type: Air Pump Check Valve
Quantity: 2PCS/lot
Size: 4mm
More About The Product
Performance: Our aquarium cleaning tool uses no electricity, has a large output, and extended service life while operating quietly and efficiently.
Easy Usage: This little purifier may be linked to the included air stone, which produces bubbles, to provide added appeal and air to your beautiful fish and aquarium.
Multi-Functional:This cleaner is used with aquarium air-driven add-ons including air stones, decorations, and tiny sponge filters. The rising air bubbles may also be used to stir the water and add oxygen so that the fish and other creatures in your aquarium can breathe and stay in clean water.
Frequently Asked Questions
This is a check valve (also called a non-return valve) that installs in the airline tubing between the air pump and the aquarium. It contains a small internal flap that allows air to flow in only one direction, preventing water from back-siphoning into the pump during a power outage.
Each pack contains 2 check valves. Having a spare on hand is practical since check valves are consumable components that can wear over time, and having a ready replacement prevents downtime in your aeration system.
The valve is sized for 4mm diameter airline tubing, which is the standard size used with most aquarium air pumps and air stones. Confirm your existing tubing inner diameter before purchasing to ensure a proper fit without air leaks.
The valve is red. Color-coding on check valves typically has directional meaning — the red end usually indicates the inlet (where air enters from the pump side). Always install the valve with the correct orientation to ensure it functions as intended and prevents back-siphoning.
If a power outage occurs while the airline tubing is submerged, water can siphon back up through the tubing and into the air pump, causing water damage or electrical failure. The check valve's internal flap closes immediately when airflow stops, blocking any reverse water flow.
A properly sized check valve introduces minimal resistance to airflow under normal operation. Some very sensitive air stone setups may notice a slight reduction in bubble output, but in most applications the effect is negligible and the protection it provides far outweighs this minor trade-off.
