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I have a kitchen sink and dishwasher under a fairly large window against an exterior concrete block wall. For venting there will be an air admittance valve beneath the sink in the cabinet, which is apparently allowed in my area for this type of scenario because the block wall does not lend...

I have read numerous posts on these forums about the subject but questions remain for my situation. I am connected to the city water utility with a 3/4" meter, there is a 3/4" PVC pipe entering the house from the meter and a 1" copper manifold that provides home-run service to each fixture via...