Qosina offers an extensive line of Check Valves, available in a variety of styles that are in stock and ready for immediate delivery. Qosina part #80068 features a clear inlet and blue outlet that has a 0.124 inch OD on each end. Made of MABS and silicone, this in-line valve has a low, 0.142 psi cracking pressure which determines when the component starts to open. Qosina offers a variety of flow rates, materials, cracking pressure and back pressure options. Check Valve sample kits are also available which are ideal for testing.