Hqua Replacement Quartz Sleeve ATS-476D Fit For ATS4-450,DWS-8V,EV-8E,SE-8V,SL-8V

Why you need replace a quartz sleeveover time, the quartz sleeve can become fouled or cloudy from mineral deposits in the water. When the sleeve is cloudy or fouled, it¡¯s not transmitting the full uv..