Pondmaster Submersible UV Clarifiers can be used either fully submersed or out of the water.  The unique vortex flow design increases water contact time with the ultraviolet light.  These UV Clarifiers also feature the glowing monitor Halo Ring that shows the light is working.  Transformer and 18 ft. power cord included.  The 40 watt UV Clarifier has a 1.5" barbed inlet and outlet and is rated for ponds up to 6,000 gallons and flow rates up to 3,000 gal/hr.  3.5"Dia. x 24"L