Figure above this wet vented piping arrangement includes a tank type watercloset a bathtub and a lavatory. this is not the only vent in the building. Assume the cross sectional area of other vents in the same system is close t o the crosectional area of the building drain. What is the minimum allowable pipe size at “A”? At “C”? At “E”?

Figure above this wet vented piping arrangement includes a tank type watercloset a bathtub and a lavatory. this is not the only vent in the building. Assume the cross sectional area of other vents in the same system is close t o the crosectional area of the building drain. What is the minimum allowable pipe size at “A”? At “C”? At “E”?