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• 0 <br /> Vacuum Sensor System Installation Guide Vacuum Connections within Sump <br /> STP Riser <br /> Vac sensor device Vac Sensor housing <br /> connection guide <br /> (use felt pen) <br /> r,s - ___ _________________ <br /> Vac Sensors ------- <br /> Vac Floats <br /> Route cables through Vac Sensor housing <br /> opening in back of support bracket <br /> bracket <br /> Figure S. Attaching Vac Sensor housing to support bracket <br /> Vacuum Connections within Sump <br /> Vacuum Connections to a Double-Wall Product Line <br /> 1. Get a 3-way ball valve, 1/4" NPT close nipple, 1/4" NPT/barbed adapter,and spring clamp from the Vac <br /> Sensor install kit. <br /> 2. Apply an adequate amount of fresh, UL classified for petroleum, non-setting thread sealant(herein after <br /> referred to as sealant) to the threads of the 1/4" NPT close nipple and screw it into the 1/4" NPT port in the <br /> vacuum termination fitting of the product line (Figure 9).Apply sealant to the other end of the nipple and screw <br /> on the 3-way ball valve. NOTE:the 3-way ball valve must be oriented as shown in Figure 9.Apply sealant to <br /> the threaded end of the 1/4"NPT/barbed adapter and screw it into the side port of the 3-way ball valve. <br /> 3. Get the 1/4" ID tubing from the install kit and measure a piece that will connect the 3-way ball valve to the <br /> barbed tubing nipple on the Vac Float(Figure 10)that is connected to the Vac Sensor labeled P. Plan enough <br /> tubing so that it isn't stretched between fittings or have any sharp bends/kinks in it. Cut and install this tubing <br /> and secure tubing ends with spring clamps. <br /> Vacuum Connections to a Double-Wall Vapor Return Line <br /> Repeat steps 1 - 2 of the Product Line connection instructions for the vapor return line connection, except: <br /> • Install the 1/4" NPT close nipple in the vacuum termination fitting of the vapor return line, <br /> • Connect one end of the tubing to the vapor return line barbed adapter and the other end to the Vac Float that is <br /> connected to the Vac Sensor labeled 'V'. <br /> Vacuum Connections to a Double-Wall Tank Vent Line <br /> Repeat steps 1 -2 of the Product Line connection instructions for the tank vent line connection,except: <br /> • Install the 1/4" NPT close nipple in the vacuum termination fitting of the tank vent line, <br /> 9 <br />