can anyone tell me where drain piping is supposed to be supported with strapping, looking at my kitchen plumbing it apears that nothing is supporting the drains, is it not a code requirement to support the kitchen ptraps and piping for trap arm? thanks for any help, sorry if its a stupid question.
That depends on how far it is travelling below the sink. every 4 feet for ABS and PVC is the rule. If for some reason it's coming out of the wall on opposite grade, it would be a good idea to support it somehow to get the water to drain properly. I had to do this in a friend's mobile home once, because the drain was coming straight thru the cabinet, and angling toward the floor. I had to strap it to a side wall to get it back on grade for him.