Toilets, Sinks, Showers, Tubs and Disposals - Dishwasher drain plumbing

I'm remodeling my kitchen and have everything open and accessible. We were plagued by a noisy dishwasher and bought a quieter one, but the drain hose is still a thin flexible plastic which could make noise in addition to the annoying gurgle in the sink. So I thought I might plumb a real drain just for the dishwasher, instead of the clamped Y connection at the sink drain.

Has anyone ever done this? I figure I can plumb a trap under the floor like bathtubs use. The DW installation manual recommends an air-gap and also says the connection to the drain must be 20" above the floor. Can anyone tell me what the air gap does and why the 20" restriction? Since my walls are open, can I plumb a high loop in this new drain to satisfy this requirement?

Can (or should) this real drain be done? Or am I just making things hard on myself.

Thanks for any info,

CJ

The word is "overkill". The dishwasher drain is NOT the cause of noise. What you are preparing to do is not going to solve a problem.No manufacturer can quiet the drain so what they do is quiet the motor and pump.I am not saying you cannot do what you are thinking of, but, it will be a lot of work for a little less noise. Some States have an "air gap" requirement which means you have to cut a hole in your sink to allow air into the dishwasher drain.The "loop" just keeps the drain from sucking out the water in the dishwasher while it is running. Running the drainline up and then down to the drain makes a trap which stops this from happening as doe's the air-gap.The ultimate choice is yours but I think it's a lot of work for little results. Good luck and post back.

OK, I guess I'll stop complicating things and use the cheap plastic pipe into the sink drain.

Thanks for info.

CJ