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Duct Cleaning <br />Procedures for Pipe Replacements <br />In order to remove fuel and residue from ducting the following clean out procedures <br />must be followed. These instructions address cleaning one run of ducting between two <br />dispenser sumps or between one dispenser sump and one tank sump. <br />1. Considering that a section of duct from one sump to the next will be isolated <br />and cleaned, remove the dispensers at either end of the pipe run or the tank <br />sump cover if applicable. <br />2. After removal of primary piping from the ducting ensure that all entry boots <br />are intact and able to be reused. All entry boots must be free of tears, holes, <br />etc. Entry boot repair kits are available if needed. <br />3. Keep entries open at the respective sumps at either end of the duct line being <br />clean. <br />4. Initiate a flow of a soapy water mixture (Nan-Igapel based {This is noted on the soap <br />ingredients)) into the ducting and let it flow to the next sump where removal of the <br />fluid is conducted while flow is moving. <br />• To initiate the flow, the soap can be added at the first sump and then <br />add water via a hose and allow the flow to continue to the other sump <br />where all contaminants are collected and safely removed. Continue <br />pumping until a clear fluid is visible. <br />5. Once all fuel/fluid has flowed through the duct until clear water is visible, <br />introduce high pressure air (Maximum 100psi) to blow out the remaining <br />water residue to the other end of the duct. <br />6. Wipe clean any residue left behind in sumps with rags, etc. and dispose of <br />these in accordance to local codes or requirements. <br />7. Dispose of all fluids in accordance with local codes and/or requirements. <br />8. After all ducting has been cleaned; install new piping and accessories in <br />accordance with Flexworks installation instructions. <br />