20pcs Aquarium Fish Tank Air Pump Accessories Unidirectional Water Check Valve Transparent

Feature: 1. With high quality materials production, good durability. 2. When the air pump is placed below the water surface, prevent backflow of water to damage the front air pump or other product equipment. After adding the stop valve, the air pump can be placed above the water surface or below the water surface, and there will be no backflow of water when the air pump is turned off. 3. Using an air pump is very easy to solve and use to prevent water from entering the machine pump. 4. Prevent the water in the fish tank from flowing back into the air pump and burn the air pump to avoid danger. 5. Suitable for fish tank, aquarium air pump. Specification: Condition: 100percent brand newItem type: Water Check ValveMaterial: PVCColor: transparent colorLength: Approx. 5.5cm/2.2inSuitable for air inlet/outlet pressure gauge tube: Approx. 4mm/0.16inWeight: Approx. 59g Function: Used as oxygenation pump due to the pressure difference between the inside and outside when the work stops suddenly, causing the waterflow to reverse, damaging the oxygenation pump and causing the water in the cylinder to overflow to form a property loss. It is an indispensable accessory of the air pump to prevent the water in the fish tank from flowing back into the air pump and burning the air pump to avoid danger. Tip: Each air outlet needs to be connected, and the double-headed air pump needs two check valves, and so on, in order to prevent the water in the hose of the oxygenation pump from flowing back into the machine during a power outage, damaging the front-end air pump or other product equipment. Use tips 1. The use of a check valve will slightly weaken the amount of airflow delivered, with resistance and little effect. 2. After receiving the check valve, it is found that there is no air after connecting. Please check whether the installation sequence is correct. If it is correct, please disassemble the check valve and gently pinch the vent port with your hand. Sometimes the temperature is high or other reasons, the rubber part is slightly stick to. . Package List: 20 x Water Check Valve