Check with the authorities in your area to learn what training they recognize and require. Flow meters Flow meters record the flow rate in a particular pipe or piece of equipment. Inside, a small lead weight rises and falls depending on the flow of water in the line. One end of the flow meter is male threaded for easy installation into a female threaded opening in a pipe. Flow meters are generally used in commercial installations where health department or building inspectors test the system by the rate and volume of water flow.
Some codes require a flow meter be installed in the system.
To install the flow meter, cut the pipe and plumb in a T fitting to reconnect the pipe. Two ends of the T are used in reconnecting the pipe, and the third opening of the T is plumbed with a female threaded reducer to make the opening the same size as the male threaded end of the meter, which is then screwed into place. Apply Teflon tape to the male end to prevent leaks. Another method is to drill a hole in the pipe that is slightly smaller than the diameter of the male threaded end of the flow meter. Because the PVC is softer than the metal end of the meter, when you apply pressure and screw it into the pipe it will self-tap.