Feedback on installation of stationary cleaning mechanism in a drinking water network
asked 9 November 2016 asked by Guillaume_GRIMARDIA (360 points)
Good evening, The first point to check is indeed the quality of your water supply. If it is coming from a pristine source, then it is your pipes and the network operation itself that is likely causing the problem. You will need to get to the root of the situation; for example, it could be an old cast iron section of pipe that regularly sloughs off rust. If you are looking for a remedial solution, it might be better to opt for automatic purging at strategic points along the network, which is easier to install, program and operate. Don't forget to include a metering system as well. And back to rusty old pipes—If that's the case, they need to be replaced.
Thank you for your reply. A few additional details: the water produced is now "healthy," but despite a first thorough cleaning of the mains and branch lines, there are still several kilometers of cast iron piping in the network and, even after treatment, these aren’t totally "clean". We have in fact installed several automatic purges on some branches but water volumes are very large compared to the results they yield. As for replacing pipe sections, that is not on the agenda for the time being. Which is why we are looking for operating experience with systems that allow for regular pipe cleaning (every 3 or 6 months?) Thank you for your help
Have considered corrosion control using polyphosphates and ph control? This will coat the inside of the pipe, preventing further corrosion and eliminating yellow water. Otherwise I think you are fighting a losing battle.