The previous owner did a real hack job (see pics). There is an open 2" PVC pipe which has 3x 1/2+ tubes running into it. [LIST] [*]the white tube is the drain tube from the dishwasher (which is 20+ feet away, and upstairs) --is this legit for a dishwasher drain line [*]the other two lines are from the water filters for backwashing purposes (one is not in use) [/LIST] Is this open drain "correct" It seems wrong to me. I assume there should be a closed pipe with a nipple-type connection for the smaller diameter tubing. I'll be putting drywall up here so I want to make sure it's not completely unsafe or wrong before doing so. Note that this is [I]not[/I] a load bearing wall! Thanks!

Hi Everyone, I have decided to DIY a basement bathroom/plumbing project. I have been researching for a past few days, and I think I have figured out how everything should be setup. I have mocked-up my design in Sketchup, but would really like it if someone could check it out and let me know what I did wrong. Some Notes: -Main stack has a toilet,sink and shower upstream on the main floor. -Clean-outs and expansion joints will be installed at every vertical stack -There is a secondary 1-1/2" stack that vents out of the attic for the main-floor kitchen sink. (Not shown) -Shower vent ties into an existing vent that leads to the main stack. -I have not busted up the floor yet, so I am not 100% sure how to tie in this new line. Doing that tomorrow. -A dummy wall will be built in-front of the insulated exterior wall to prevent the pipes from freezing. A few things that I was wondering about: 1. Do you need to have a clean-out for a dedicated vent stack? (the one off of the shower) If not, I will route it better. 2. Do I even need a vent stack for the shower? Wet venting is permitted in Manitoba, however I am not sure if the vent for the sink is close enough. 3. Do clean-outs need to be fully exposed, or can I have them buried enough so that you can just remove the cap? 4. Does it make sense to run 4" pipe to the toilet, or is 3" good enough? 5. Does the toilet have to be downstream of the sink and shower. I am a bit confused by this. 6. I have two options for the sink vent. Either I can tie it into the secondary roof stack as a wet vent, or I can cut up the wall and tee in a dry vent above the kitchen sink. I am not sure if this existing 1-1/2" pipe is suitable to wet vent a toilet, 2 sinks and a washing machine. I doubt it. 7. I got the impression from [url=https://winnipeg.ca/ppd/Documents/Brochures/Plumbing-Installations.pdf]this file[/url] that I had to use double 45Deg fittings instead of a sweeping elbow when transitioning from horizontal to vertical. (See page 7 & 9) Whats the idea behind this? [url=https://drive.google.com/drive/folders/1ag0K4q4XpnGyP_vorQOowXdEaN7LaEcB?usp=sharing]Files & Pics[/url] Thanks in advance for all the help.