I purchased a home last month for the first time. I went through the house with the inspector. He said there is no venting on the double kitchen sink. He also said i could install a" cheater valve". He said it isn't that hard to do.When i wash dishes in the sink it takes till the next morning for the sink to drain. I went to home depot and purchased a cheater valve abs inline vent and a T pipe( i think that is what it is called). The plumbing is all pvc. the T pipe he gave me is a 1 1/2", it looks bigger than the pvc pipes that are already there. Does anyone know where I can find directions on how to put this vent in. Thank you for any help you may be able to give.