[ Control Valve Upgrade ] R171016 chlorinator uses high-density materials to improve valve quality, avoiding impurities blocking and of the valve after chlorine reaction. By changing the inner diameter and appearance of the control valve, the fracture and leakage of the original chlorinator valve can be solved, and the water flow speed can be more easily controlled. [ Chlorinator Function Improvement ] for Rainbow 300 chlorinator improves water treatment to 72000 gallons by changing the control valve and redesigning the capacity of the , making it suitable for large, medium, and small swimming pools and spa centers, making your life easier! [ Upgraded Design ] The R171016 swimming pool chlorinator has increased the base diameter, increased the contact area, and improved the stability of the chlorinator during operation. The gasket of the threaded cover adopts a flat prototype design, making it more fitting, improving sealing performance, and avoiding water leakage. [ Instructions ] The R171016 chlorinator is equipped with all the necessary accessories for installation, so you don't have to worry about installation. During use, it is recommended to regularly lubricate the O-ring and control valve to avoid wear and reduce their service life. Regularly clean control valves and hoses with clean water to avoid blockages.(Lubrication oil without) [ Scope of Application ] The 300 swimming pool chlorinator is compatible with for R171016 rainbow 300 chlorinator and is suitable for above ground and underground swimming pools and spa centers. Please note: There may be slight color difference or difference in the actual product, which does not affect the use, please don't mind, thank you! A Specifications: Metal switch can control flow Color: As Shown Material: plastic Package Contents: 1 x Pool Chlorinator Chlorinator 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.