1. A water meter for determining a flow of water, comprising:
a meter maincase defining an inlet for receiving the flow of water and an outlet for discharging the flow of water;
a metering device positioned in the maincase between the inlet and the outlet and operable to measure the flow of water through
the maincase from the inlet to the outlet; and
a flow restricting device positioned between the metering device and the outlet, wherein the flow restricting, device includes
a plurality of flexible vanes that define a variable orifice through which the water flows from the metering maincase to the
outlet, wherein the flexible vanes are each biased toward a closed position to restrict the size of the variable orifice and
create a source of back pressure for the flow of water through the water meter.