Vendeur: pro-shrimp (13.481) 99.9%, Lieu où se trouve: New Houghton, Lieu de livraison: Worldwide, Numéro de l'objet: 262247646393 Brand: JBL, Water Type: All Water Types, Les Détails: Pro Shrimp's comment: This is one of the most important bits of kit you need when running an air pump with either filter or air stone. Especially if your pump is located below the water level (for example beneath the tank in your cabinet) this check valve stops water from running back into the air pump. Without this valve their is a certain risk that a malfunction can cause the tank to drain through the airline. JBL ProSilent air accessories have special safety connectors fixing the items to the airline without the risk of pulling off the airline. Protects items such as diaphragm pumps from backflow of aquarium water.For 4/6mm dia. air hoses.TÜV tested = safety guaranteed!