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Installation Vacuum Connections within Containment Sump <br /> 6. Measure a length of 1/4" ID tubing to connect the VAC TEST port (ref. Figure 12) on the Vac Sensor labeled <br /> 'T' to the tank's interstitial 3-way ball valve. Plan enough tubing to avoid sharp bends in it or stretching it. Cut <br /> and install this tubing and secure tubing ends with spring clamps. <br /> 7. 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 /> Vacuum Connections to Siphon Port of the Pump <br /> 1. Figure 12 is an example diagram of the vacuum connection at the The Red Jacket STP. <br /> NOTE: It is recommended that you replace the Siphon Jet assembly on FE Petro pumps used with the Vac <br /> Sensor. <br /> o vacsensor/fig 12.eps <br /> 0 <br /> 0 r p� <br /> O <br /> O 1/4" NPT male to 1/4" barbed adapter <br /> O Spring clamp <br /> O o <br /> 1/4"ID tubing connects <br /> STP siphon cartridge to open tee fitting in <br /> p g Siphon cartridge Vac Sensor vacuum <br /> ID mark' manifold <br /> "NOTE:For STP siphon cartridges which have the ID Mark circle, <br /> an external siphon check valve is not required. <br /> Figure 12. Example Vacuum Source Connection at The Red Jacket STP <br /> 2. Measure a length of 1/4" ID tubing to connect 1/4" ID barbed tubing fitting in the siphon cartridge port and <br /> the vacuum input open tee of the Vac Sensor(see Figure 13). Plan enough tubing to avoid sharp bends in it or <br /> stretching it. Cut and install this tubing and secure tubing ends with spring clamps. <br /> 14 <br />