Remarkable Effect of Cleaning Water Mains.
Several times this journal has printed data of an important kind relating to the beneficial results obtained by cleaning water mains. Until recently, no method in waterworks practice was employed for this purpose, consequently, miles of mains of certain dimensions were so far impaired by incrustation that they became almost useless for domestic purposes, and practically so when pressure for fire service was required. Since the adoption of the main-cleaning process was introduced by the National Water Main Cleaning company, there no longer exists any difficulty in restoring pipe that is badly clogged by incrustation to its normal condition. In a considerable number of cities the system has been tried, and in no case has it failed to give efficiencies from 50 to 125 per cent. This must be a great consideration to waterworks managers, especially as the cleaning is performed at a nominal cost, when the price of new pipe is taken into account. The two illustrations given herewith are sufficient to show the advantage to be derived by having obstruction to mains removed. The cleaning was done in a Western city, where the water efficiency was increased 100 per cent. The pressure, as will be seen, which was barely sufficient to throw a stream 25 ft. before cleaning, was increased to one of ample size for fire service. There is no longer any doubt that the cleaning process, whether considered from the standpoint of convenience or that of money-saving, is one of the best helps that has, of late, been added to the effective managements of waterworks plants.