The letter D in a dream represents confrontation with sacrifice. Full awareness of a situation that demands that you give something up or put others first. The symbolism is based on the design of the letter D being a straight line that is facing a half circle.
drain line: A pipe line which is used to carry water from the water treatment system to a waste system. drinking water: A water treated or untreated which is intended for human use and consumption and considered to be free of harmful chemicals and disease-causing bacteria, cysts, viruses or other microorganisms.
Water Treatment. Treatment has two steps, filtration and disinfection. Both steps are necessary to remove or kill all bacteria, viruses, and parasites and make the water safe to drink. Step 1. Filtration removes soil particles and plant material that can interfere with disinfection.