dishwasher drain installation: The Most Common Dishwasher Installation Defect - 07/19/10 11:39 PM
 
An improperly installed drain hose is by far the most common defect that I find with dishwasher installations, but it's also one of the easiest things to get right.  In the photo below, which was featured as a Structure Tech Photo of the Day, there are several plumbing defects, two of which are related to the dishwasher drain.  
Can you spot them?

Wrong side of trap Problem number one is that the drain is connected to the sewer side of the trap.  The water that always sits in the bottom of the P-trap is what prevents sewer gases from coming in … (27 comments)