High-power Oxygen Pump Stop Valve 4mm Water Stop Valve

Working principle---When the position of the air pump is lower than the water surface, in order to prevent the backflow of water from damaging the front end of the air pump or other product equipment, the air pump can be placed higher than the water surface or lower than the water surface after adding a stop valve.One-way non-return air pump accessories---The air pump has no danger of pouring water when it is cut off and stops working, and it is the little guard of the air supply facility. The air pump is very easy to operate and use, preventing water from entering the pumpPackage Contents---20pcs x Air Check Valve. Protects your air pump by preventing aquarium water from back-siphoning during power outages.Working principle---Used as an oxygen booster pump, due to the pressure difference between the inside and outside when it suddenly stops working, the water flow is reversed, the oxygen booster pump is damaged, and the water in the cylinder overflows and causes property damage. It is an indispensable accessory for the air pump to prevent the water in the fish tank from flowing back into the air pump and to burn the air pump to avoid danger.Aquarium Check Valve---The check valve is suitable for ordinary aquarium air pump. One-way check valve for aquariums and fish tanks. Made of high quality plastic material, it is strong and durable and has a long service life.Colour:As shownMaterial:plasticSize:4mmPackage Contents:20 x check valveOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.