You can get a Plan Review by an architect at the Fire Marshalâs Office, and they have satellite offices all over the state.
Primary flow element. A primary flow element is the element of a flow meter that serves to indicate the quantity or velocity of flow. For example, in the case of an orifice flow meter, the differential pressure across the orifice plate is the primary flow element.
In most of the world water meters measure flow in cubic metres (m 3) or litres but in the USA and some other countries water meters are calibrated in cubic feet (ft.3) or US gallons on a mechanical or electronic register. Some electronic meter registers can display rate-of-flow in addition to total usage.his type of water meter is most often used in residential and small commercial applications. Displacement meters are commonly referred to as Positive Displacement, or PD meters. Two common types are oscillating piston meters and nutating disk meters.