Four Pin PLL UV lampholder for Hozelock ,UV Pond Filters Bioforce Revolution range 6000/9000/14000 ,18/24/36 watt UV or any ultraviolet lamps which are four pin PLL fitting as per photo. These do require replacement in the event of moisture ingress from condensation or failed seals and gaskets in the electrical head . Also included is a gasket set for the flow adjuster , quartz sleeve and lid seal .
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