A Nutrition Consultant in the Houston, TX Area area reported making $34,000 per year
Water level (device) A water level is a device used for matching elevations of locations that are too far apart for a spirit level to span. The simplest water level is a section of clear tubing, partially filled with water. Water is easily procured for use, and easily discarded after use.
Water hammer is a complex process of formation of elastic deformations in a liquid and their propagation through a tube. If the pressure rise is very great, the impact can cause damage. Safety devices (equalizing reservoirs, air domes, valves, and so on) are installed in pipelines to prevent such damage.