A clear, pure fused quartz tube used to protect the high intensity ultraviolet lamps in ultraviolet systems. It usually retards less than 10 percent of the […]
A system for the provision to the public of piped water for human consumption, if such system has at least 15 service connections or regularly serves […]
1. A decrease in the water pressure (in psi) which occurs as the water flows. Pressure drop may occur for several reasons: internal friction between the […]
The difference in the pressure between two points in a water system. The difference may be due to the difference in elevation and/or to pressure drop […]
A switch which operates on changes in pressure. Usually this is a diaphragm pressing against a spring. When the force on the diaphragm overcomes the spring […]
The application of a granular filter medium, such as diatomaceous earth or powdered activated carbon to a membrane or screen or other filtration surface, prior to […]
