Basic DWV - Video:4 Basic Drainage Sizing (Part:2)

[@ioda006]

These are so much fun to learn from, I love your style of diagraming and explaining!

[@jeadoretu]

Kelly!! Found you in level two in 2021 and I’m almost done my level 4. Going to write the red seal soon even though I have many hour left to work before I get my certification. Just letting you know that I’m back to watching your videos as a way to study for my exam (boy do I need to review DWV! I don’t use the code much as a service plumber) Thank you for being a great teacher and part of my review. 🥳

[@frozenowl8141]

Ontario code 2015 has this fixture unit table on 7.4.9.3

[@MathematicPlumber]

I do believe Ontario is still using their own gas code, not all provinces have aligned with gas or plumbing code practices. A shame really, we should have one. (Even the States have more than one code)

[@dominiquepierre916]

Great video 👏👏👏👏 If possible ,would you please teach us wet venting and if possible solving venting and drainage pipe size in commercial buildings ,just I am preparing myself for IP exam .

[@MathematicPlumber]

The wet venting series is in production right now. As for the commercial drainage, I have multiple series dealing with them already. (circuit venting, vent stacks, rainwater leaders)

[@dominiquepierre916]

@@MathematicPlumber Tanks a lot .

[@dominiquepierre916]

I really learned a lot from your teaching 👍

[@denvercharlebois699]

Is the building drain not supposed to be 4” minimum based on code rules?

[@MathematicPlumber]

2.4.9.4 Building drains and building sewers connected to the public sewer system downstream of the main cleanout (see Sentence 2.4.7.1.(6)) shall be not less than 4 inches in size. Keywords: 'downstream of the main clean out' and 'connected to the public sewer system' Therefore, the building drain upstream of the main CO can be 3". This also means that if I connect to a 'private sewage system' I can also be 3" for the building sewer or building drain. You would need to ensure all other code requirements are met too.

[@denvercharlebois699]

Oh okay. So anything past the clean out can be 3”? I’m in plumbing school in Ontario and was just told that 4” is minimum until it goes vertical on a stack then it goes to 3” minimum

[@denvercharlebois699]

Thanks for the tips

[@MathematicPlumber]

​@@denvercharlebois699What I gave you was a direct quote from the NPC. There may be an Ontario amendment that I am not aware of. (I am in Alberta) There of course is nuance in the code. If you had 3 or more water closets draining into the building drain, then you would need to size that pipe at 4" as soon as it travels nominally horizontal.

[@iloveapples99]

great video , very clear and easy to follow.

[@Joe-rw3vt]

Hi Kelli are you located in Toronto? Going to be writing my CFQ looking for a tutor

[@MathematicPlumber]

Alberta, but I don't do any tutoring. I teach full time and that leaves me with very limited time.

[@dominiquepierre916]

@@MathematicPlumber You have brilliant talent in teaching . I wish I was at the school that you teach . Please make more videos ,👍

[@dominiquepierre916]

If you make some videos in blue print and manholes and calculating risers ,It will be great .

[@MathematicPlumber]

​@@dominiquepierre916 I don't foresee any blueprinting videos in the future. If you want to get good at reading blueprints, you need to get your hands on a real set of prints, and study them. That is the only way to get comfortable with them. As for orthographic and isometric drawings, I might do some videos on them, but it is very low on the priority list. I will eventually make a video covering cleanout codes and locations, but manholes only get an honourable mention in the code. I barely mention them in my class. Most plumbers never deal with manholes. What do you mean by calculating risers?

[@dominiquepierre916]

@@MathematicPlumber Calculating the elevation of the pipes , It is second year of plumbing in blue print . I remember there were several questions of those in IP exam.

[@Joe-rw3vt]

Excellent tk