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• <br /> Vacuum Sensor System Installation Guide <br /> Vacuum Connections within Sump <br /> STEEL TANK FIBERGLASSTANK <br /> I <br /> 3-way ball <br /> valve <br /> Tbarbed <br /> 3-way ball valve Relief valve <br /> ittingSensor cable 1/4" NPT barbed fitting (1/2° NPT) <br /> g Ito junction box Sensor cable <br /> camp 1 j Spring clamp /-to junction box <br /> 1/4" ID tubing 1/4" ID tubing <br /> to Vac Float—' .Cord grip to Vac Float ,l Cord grip <br /> 1/4" NPT `—Riser cap 1/4" NPT close nipple Riser ca <br /> close nipple p <br /> woen""Meto.eps <br /> Figure 11. Example tank Interstitial sensor riser cap connections-steel and fiberglass tanks <br /> 6. The Vac Sensor labeled 'T',and which is connected to the 3-way ball valve in the tank interstice riser cap,must <br /> be wired together with the tank interstice liquid sensor in the junction box. Locate the ends of the Vac Sensor <br /> cable labeled 'T and the tank interstitial liquid sensor cable,tape them together,and tag them 'Tank Vac <br /> Sensor'. <br /> Qx Vac Sensor <br /> Q (not connected to a Vac Float) <br /> rJ <br /> Cable to VAC TEST port <br /> junction box <br /> (Barbed elbow <br /> Vac Sensor cable—' <br /> (tagged'T) 11/4 <br /> Spring clamp <br /> "ID tubing to <br /> tank 3-way ball valve <br /> Figure 12. Connecting vacuum tubing from tank 3-way ball valve barbed fitting to a Vac Sensor <br /> Vacuum Connections to a Double-Wall Fiberglass Tank <br /> 1. Get the tank's interstitial riser cap, interstitial sensor, cord grip components,3-way ball valve, 1/4" NPT close <br /> nipple, 1/4" NPT/barbed adapter fitting,spring clamps,and relief valve from the kit. <br /> 12 <br />