I am planning to install a vent for the drain line ont he dishwasher. First off it seems odd the vent part has two different size nipples on it. If I am removing the hose from the garbage disposal and putting it to the vent. Thent he other side of the vent to the disposal should the nipples be the same size.
One last question, What is the best metholfd to get a 1 3/8" hole in the stainless steel sink? Is a whole saw the right choice? How about a starter hole and a jig saw. Any ideas would be appreciated.