Qosina offers an extensive line of check valves, available in a variety of styles that are in stock and ready for immediate delivery. Made of acrylic and silicone, this high flow valve has a cracking pressure that can be adjusted to open between 0 and 2 psi. Qosina part # 11083 accommodates 0.375 inch ID tubing and allows for low flow resistance, low opening pressure, and positive seal against backflow. 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.