I am in the process of adding a laundry sink next to the washer. I have attached diagrams of the current setup and proposed new DWS system. The vents are all dry. The washer is front loading and uses 13 gallons through a full wash cycle and dumps it in little amounts at a time through a 3/4" hose (so the 2" drain is more than enough). All slopes are 1/4" per foot.
Just a few questions:
- Do I need to switch to 2" pipe where the 1.5" San T dumps in to the 2" elbow or can I run 1.5" all the way to the 2" combo tee at the base of the vent stack?
- Is there an option for not adding another vent (I added the vent since I could not figure out how to keep the sink drain outlet above the trap and still get under the p trap of the washer)?
- I want to use 1.25" for the new vent to get through the stud with smaller hole but I can not find it in ABS. Can I use transition glue for PVC for the horizontal piece of the new vent section only? That section of the vent is dry and well above any potential water level (the house would be 4' under water at that point).
- Is there a better location for the test tee cleanout? Is 1.5" okay to use for a cleanout? Currently there is no cleanout.
- The San T for the sink outlet fits directly into a 1.5" to 2" bushing inside a 2" elbow. Is this the correct use of these fittings (no pipe is used in this transition).
Any help is appreciated.