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8. Remove the adapter tee cover, see Figure 2. Lubricate the cover 0-rings, the threads, and unpainted surfaces with grease and leave the cover inside the sump for future use, if necessary. 9. Examine the straight bore below the straight threads for roughness caused by corrosion. If rough, contact FE Petro Technical Support for further instructions. 10. Screw the leak detector into the adapter tee, and tighten with a 1-'/2" socket or pipe wrench on its hex top. The STP- MLD-HC or-HCD must be screwed completely into the adapter tee to provide a good seal. 11. Remove the plastic dust cover from the vent port at the top of the leak detector, see Figure 2. 12. Remove the 1/4-inch plug from the TANK PORT on the pump. Apply UL-classified, non-hardening, non-toxic pipe thread sealant to the threads on the tubing fitting and install one 90°fitting in the leak detector vent port and either a 901 or straight fitting in the tank port. Take steps to prevent any foreign materials from getting into the top of the leak detector as Caution Adamage to the sealing surfaces in the piston area could result, preventing the leak detector from operating correctly. The FE Petro STP/ISTs have several ports. The leak detector must be vented to the tank port only. Caution &This is the port closest to the tank. Do not connect a leak detector to the syphon port, as this will make the leak detector inoperative, causing it to be incapable of detecting a leak, with resulting risk of contamination of the environment. Also, do not vent the leak detector to a pressure port, as this will keep the unit from operating properly. 13. Install the copper tube packed with the STP-MLD-HC into the compression fittings just installed in step 12 above, and firmly tighten. The tubing may be shortened if necessary. This line vents the air displaced by piston travel, and drains any liquid, which may leak past the Caution piston seal. When installing this tubing make sure it is not crimped and that it will drain properly to the tank, or the leak detector will not open properly and could give a false indication of a leak. Failure to install and connect this tubing could result in environmental contamination. 14. Turn power on at the load center and turn on the submerged pump at a dispenser. Look for leaks at the parts just worked on. If there are any leaks, immediately turn off the power at the load center, tag and lock out the breaker, and repair the leaks. 15. Purge remaining air from the system as follows: Turn on power at the load center, and dispense enough product from the dispenser furthest from the pump to remove all the air from that line. Repeat this procedure with each dispenser, working your way back to the pump. (Other methods may be used as long as the air is removed). The STP-MLD-HC or-HCD will not work properly if all of the air is not removed from the system. Note: If, on dispensing fuel in step 15 above, you find the flow restricted to 1.5 to 3 GPM, the leak detector has not opened. This could be due to air trapped in the system. Turn on the submersible pump at the dispenser but do not dispense any fuel. Wait approximately 2-3 minutes. If the line is leak free the pump will pressurize the system opening the STP-MLD-HC or-HCD, then purge the air from all dispensers as in step 15 above. Note: This leak detector should perform a line leak test within 3-5 seconds from the time the submersible pump is turned on at the dispenser. Air or vapor in the system will cause this time to be longer in proportion to the amount of air or vapor in the lines. If the nozzle is opened before the completion of the line test, the leak detector will detect this opening as a leak and restricted flow will result. Close the nozzle for a period of time to allow completion of the line test, and the leak detector will allow full flow again, provided there is no other escape of fuel. 5