If you can see inside your power meter and it's of the older style with five mechanical dials, you will see that the five dials are connected to one another through a gear train like this, with the gears having a ratio of 10:1. small gear and a larger gear are connected together, one on top of the other. Gear trains often consist of multiple gears in the train, as shown in the next two figures. In the case above, the purple gear turns at a rate twice that of the blue gear.
2 feet & lt ; < b > NOT exactly < / b > < br / > Depends on the codes and type of  drain  & nbsp ; For example a trap can be located 2 feet from a vented line and the fixture located 2 feet from the trap & nbsp ; A floor drain in some codes can be located up to 15 Feet from a vent , then you have indirect drain lines such as an ice maker or ...
With a 1.25 -inch diameter pipe, sloping at 1/4-inch per foot, the pipe 5 feet away or more from the trap will be flooded by water just coming over the crown weir of the trap. This is why vents must be within 5 feet of a trap to be effective. Any fixture within 5 feet of the stack should not need a separate vent. Since many drain and waste pipes are larger than 1.25 -inch diameter, there is a safety factor built into this.