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 ...
Then you continue out horizontily from the tee to your fixture (shower, floor sink, etc.) and install a trap directlly underneath where you want to come up verticly. In this case the horizontil arm of that drain, from the tee to the fixture can be no longer than 6 feet. Another option is to use what is called a combination waste and vent. In this case you will need to run 3 pipe up and out the roof.