Rugged, industrial strength UV clarifier for residential, commercial, and municipal projects; Reflective stainless steel purification chamber boosts UV-C effectiveness by 35%; Oversized inlet & outlet ports plus 3" diameter housing, produces better flow rates; Includes 1" - 1 1/2" stepped inlet & outlet barb fittings; 1-1/2" FIPT inlet & outlet "standard schedule 40 PVC fittings"; UV-C bulb lasts 9,000 hours; Available in 40, 55 & 70 watt sizes