CALL US DIRECTLY TO ORDER!Big Boy (aka Big Blue) units use standard-sized high flow vessels that are capable of delivering 16 gallons per minute. They also use larger 4.5" X20" filter cartridges for increased filtration capacity. Big Boy units come with 1.5" FNPT (female nipple pipe thread) Ports for minimized pressure drops. Comes with a 5 micron sediment filter and UV lamp. These are tough, heavy duty units built to deliver very clean, bacteria-free water.Specifications:Maximum Flow:16 gallons/minReplacement Lamp Size #:20Lamp Power Usage:22 WattsReplacement Sleeve #:20Height:28"Width:15"Depth:9"Port Size (FIP inlet & outlet):1 1/2 " inchUV Exposure:16,000 MWS/cm