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 ...
Drain and vent lines must be positioned precisely, so you should install them before the supply pipes. It may be possible to simplify supply runs by moving a vent pipe over a few inches.f the toilet drain does not connect directly to a vent, you must find another way to vent it. If the drain line runs away from the wall where you want the vent, use a reducing Y and a 45-degree street elbow to point the vent line toward the wall. The horizontal vent pipe runs right next to the closet bend.