ITEM NAME:5pcs/bag Aquarium Fish Tank Air Pump Check Valve One Way Non-Return Valve A#S Product Description Description: Features: To prevent water backflow to damage the front end of the pump or other products and equipment. After the addition of the stop valve, the pump can be placed above or below the surface of the water to prevent the risk of water backflow when the pump is shut off. Each outlet needs to connect a stop valve, two-headed pump needs two stop valves, and so on. Specifications: Quantity: 5pcs/bag Overall length: 36mm / 1.42in, the diameter of the middle circle: 8mm/0.31in Two ends: inner diameter: 3mm/0.12in, outer diameter: 4mm/0.16in Suitable for common air pipe(innner diameter approx. 4mm/0.16in) Note: The OUT surface is air outlset, and the other side is air inlet. Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-2cm size deviation due to manual measurement. Included: 1 Bag(5pcs) X Valves.1 Bag(5pcs) X Valves. After the addition of the stop valve, the pump can be placed above or below the surface of the water to prevent the risk of water backflow when the pump is shut off. Each outlet needs to connect a stop valve, two-headed pump needs two stop valves, and so on.
