Watts Febco Composite BFP Air Gap 3 4" to 1" for 825 Series and 1 2" to 1" for 860 Series RD12SP30 60 Hz Wire Size Max 60 Hz Wire Size Max #12 AWG Operating Temperature Max (°C) 85 Operating Temperature Max (°F) 185 Operating Temperature Min (°C) 40 Operating Temperature Min (°F) 40 Product Depth (in) 3 3 4 Product Depth (mm) 95 Product Height (in) 10 Product Height (mm) 254 Product Width (in) 6 1 2 Product Width (mm) 165 Unit Carton Height (in) 4 615 Unit Carton Width (in) 9 reliable solution for managing backflow assembly drainage the hardware needed for standard installation onto the relief valve is included with the product