Subject: VENTING From: Ernst Meyer Date: Fri, 02 Sep 2011 15:29:04 -0400 To: "ltespo@verizon.net" EVENTING ======= Vents arising in the basement: The 3" main stack vent issues from 4" main sewer. A 2" vent issues form the center of a 3" double wye that receives drainage from two 1st floor toilets. 0988 0913 0914 A 1 1/2 inch vent issues from the 2" drainage of the 1st floor shower. A 1 1/2 inch vent issues from the subsurface tank 1005. A 1 1/2 inch vent issues from the 1st floor 1 1/2 inch bathtub drain. Vents arising on the 1st floor: A 2" vent issues form the center of a 3" double wye that receives drainage from two 2nd floor toilets. 0900 0908 0909 0912 A 1 1/2 inch vent issues from the center of a 1 1/2 inch double wye draining two 1st floor bathroom sinks. 0902 0904 0905 A 1 1/2 inch vent issues from the 2" drainage of the 2nd floor shower. A 1 1/2 inch vent issues from the 2nd floor 1 1/2 inch bathtub drain. 0897 Vents arising on the 2nd floor: A 1 1/2 inch vent issues from the center of a 1 1/2 inch double wye draining two 2nd floor bathroom sinks. 0982 0890 A 1 1/2 inch vent issues from the vertical of as 1 1/2 inch wye draining the second floor kitchen sink. (There is no first floor kitchen.) Vent Mergers: There are no vent mergers in the basement or on the first floor. On the second floor, the 1 1/2 inch vents from the first and second floors bathtubs merge into a common 1 1/2 inch vent. 0876 This common 1 1/2 inch bathtub vent merges with the 1 1/2 inch kitchen sink vent into a two inch vent pipe. 0873 0874 0875 0876 This 2" vent from tubs and kitchen sink merges into the 3" main stack. 0872 The 1 1/2 inch vent from the 1st floor bathroom sinks merges with the 1 1/2 inch vent from the 2nd floor bathroom sinks into a 2 inch vent pipe which merges into the 3" main stack vent 0884. The 1 1/2 inch vent from the 1st floor shower merges with the 1 1/2 inch vent from the 2nd floor shower into a 1 1/2 inch vent 0885 which merges 0881 0884 with the 3 inch main stack vent. The two 2" vents from the 1st and 2nd floor toilets respectively merge into a common 3 inch vent 0864 0865 0882 which does not enter the main stack vent but issues through the roof as a separate pipe.