Geniescience
Homeowner
I'm working on plans for a kitchen with the dishwasher located far from the kitchen sink. The drain would be about ten feet long.
As far as I see it, the high loop has to be near the dishwasher.
There is no countertop air gap by plumbing code here.
After the high loop the drain line can run to the dishwasher connector Wye above the sink trap.
An alternative to the high loop is to make a standpipe; this has the same advantage as an air gap, I believe. Probably better, as it can be higher than the counter.
First Question
--- Is there a maximum distance for the DW drain line ? I don't know where to find the answer.
Second Question
I have often seen a length of DW drain line positioned lower down than the dishwasher Wye -- the water has to go uphill to get into the Wye. I have often wondered about the standing water in it. In one of the threads here I once saw a DW line going under the floor and then coming back up through the floor to get into the sink trap. It worked. Was that because the DW machine was an old clunker with a powerful pump?
--- So, if I have to run a length of drain line positioned _lower_ than the Dishwasher Wye, what are consequences?
David
As far as I see it, the high loop has to be near the dishwasher.
There is no countertop air gap by plumbing code here.
After the high loop the drain line can run to the dishwasher connector Wye above the sink trap.
An alternative to the high loop is to make a standpipe; this has the same advantage as an air gap, I believe. Probably better, as it can be higher than the counter.
First Question
--- Is there a maximum distance for the DW drain line ? I don't know where to find the answer.
Second Question
I have often seen a length of DW drain line positioned lower down than the dishwasher Wye -- the water has to go uphill to get into the Wye. I have often wondered about the standing water in it. In one of the threads here I once saw a DW line going under the floor and then coming back up through the floor to get into the sink trap. It worked. Was that because the DW machine was an old clunker with a powerful pump?
--- So, if I have to run a length of drain line positioned _lower_ than the Dishwasher Wye, what are consequences?
David
Last edited: