New Year's Eve Dinner. The New Year's Eve dinner is the most important dinner for the Chinese. Normally, this is the family reunion dinner, especially for those with family members away from home. During the dinner, normally fish will be served. Dumplings are the most important dish in Northern China. These two dishes signify prosperity.
A trap arm is only the section of pipe between a trap and the vent. A fixture drain is the section of pipe between a trap and another section of drainage. The information on this site is for informational purposes only.
As you can see in this picture, the pipe between the trap and the waste stack it's connected to, is not vented until it reaches the stack so it would be called a trap arm fixture drain. The trap arm fixture drain is sized by the trap it is connected to, and is graded at a minimum of 1/4 per foot(1:50) slope.