Quartz Sleeve for Water Master - WG-15D UV Light Bulb for Germicidal Water Treatment B1801-08 this is most likely the

this is most likely the culprit

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Quartz Sleeve for Water Master - WG-15D UV Light Bulb for Germicidal Water Treatment B1801-08 this is most likely theReplacement Quartz Sleeve for Water Master WG 15D UV Light Bulb for Germicidal Water Treatment In order for your germicidal water system to work effectively, it is imperative that the quartz sleeve is completely clear. A foggy or dirty quartz sleeve can significantly attenuate the power of your UVC bulb, resulting in substantially less sterilizing power. A good way to think about it is that if you have trouble seeing through the sleeve then it is very