The PP451 model mount to rooftops or other smooth horizontal surfaces. All models accommodate domes that use 1.5-inch NPT pipe. The PP450 and PP451 can be used in applications where mounting and height clearances of models PP350 and PP351 are inadequate. Models PP450 and PP451 are higher by 9.72 inches (24.69 cm) and the overhang is increased by 14.77 inches (37.52 cm).
