UPVC Check Valve: the total length of the 1 inch UPVC check valve is about 5 inches/ 127 mm, the inner diameter of the interface is 1.26 inches/ 32 mm, and the thickness is 0.2 inches/ 5.1 mm; The double jointed check valve has a spherical ball in the valve body to play a check role, allowing one way flow and closing to avoid backflow; Detachable cleaning design is easy to use Transparent and Visible: the transparent blue pool check valve allows you to clearly observe the fluid dynamics in the tube, convenient and fast, and plays a convenient role in monitoring, which can be suitable for design and installation requirements; While the blue version provides a vibrant color that adds color to your setup Easy to Use: aquarium check valve can run on the installation without any adjustment or setup, and can be easily removed without breaking the pipe connection; The UPVC check valve has no spring and is designed for vertical installation and must be applied in an upflow position to work properly; When installing the check valve, the flow of the valve must point in the direction of flow; Do not install the valve upside down Quality Material: this pool valve is made of UPVC material that ensures its durability; It has the characteristics of high hardness, tight connection, durability, heat resistance and cold resistance; The maximum rated pressure is 200 PSI; This valve is designed to last long Versatile to Use: UPVC swing check valves are Perfect for flow control and can be applied in commercial plumbing, aquariums, irrigation, swimming pools, water parks; Note that the machine production of the product may have an error within 0.51 cm, which is normal and will not affect the use of the effect Colour:blue Material:plastic Package Contents: 1 x UPVC Check Valve Only the above package content, other products are not included. Note: Light reflection 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.