As a master plumber in Ohio & West Virginia, I am impressed by your presentations. Wish I had access to videos like these as a young plumber. You do an excellent job explaining in simple terms some very difficult code and meaning. Keep up the great work!
OK, thank you I have another question can a vent serve waste and soil stock at the same time and what table should I use for sizing this vent stack( should I choose the bigger size between waste and soil?
Hi Tom. If I know the total number of dfu of a building and I need the total flow in lps, do I simply divide by 2 and multiply by 0.06 lps? he result is a very high flow rate. What other conversion alternative is allowed? thanks
I was taught you need to transition to 4'' from 3'' when going from building drain to building sewer is this necessary? or can you run a 3'' building sewer? i can't find where it says you can't. Thanks for the awesome videos!
I don't know of any code requirement for that transition. However, PVC Sewer pipe is not available in 3" so that is probably why we transition from 3 to 4 each time. Local jurisdictions may have additional requirements for the sewer being 4" which are not in the code.
Thanks for the video, very informative. I am remodeling a bathroom changing a tub to a shower. Most of the drains for pans etc are 2”, but existing line is 1 1/2”. Since the rules on showerheads are 2 gpm, do I need to change it to 2”?
So let’s say I have two bathroom units on a second story draining down to the first floor on a 3” pipe, then that 3” runs to the main sewage line under the slab. Can I tie 7 more DFUs into the 3”?
On the tables in chapter 7 you will find then number of drainage fixture units for pipe sizes. It sounds like you should be fine if you have two bathroom groups and the other 7 DFUs. A bathroom group is 5 DFUs. And a 3" horizontal branch can handle 20 DFU. So it sounds like you have 17 DFU total and you should be fine.
When determining pipe size on building drain with 48.5 DFUs i see it should be 4”. But if i move past two branch lines that have 9.5 DFUs do i move to a 3”? Also if no slope is given what slop size should i use?
Yes you can decrease the building drain pipe size as the dfus carried by the pipe decrease. Reducing from 4" to 3" when toward the end of the horizontal branch can be a great way to save money because 4" fittings and pipe cost more than 3". When no slope is given, you can go on the minimum requirements on IPC Table 704.1.
This channel is underrated...i hope it keeps on with this info ... It's great to have an ipc specific channel.
Thanks for watching.
As a master plumber in Ohio & West Virginia, I am impressed by your presentations. Wish I had access to videos like these as a young plumber. You do an excellent job explaining in simple terms some very difficult code and meaning. Keep up the great work!
Thanks!
Thanks man, that’s the best explanation I’ve ever seen again thanks 🙏🏻
Awesome. 😎. Thanks for watching!
Awesome video!
Thanks!
Thanks Tom. Cleared up alot for me
Glad it helped
Thank you so much for explaining these.
You're very welcome!
OK, thank you
I have another question can a vent serve waste and soil stock at the same time and what table should I use for sizing this vent stack( should I choose the bigger size between waste and soil?
For that I would refer you to my videos on chapter 9. There are different sizing tables depending on the venting method.
Great video
Thanks!
Awesome video! Thanks!
Thank you!
Hello,
There is a Footnote about dfu of floor drain
Can you specify When to count it 0 and 2?
Use 0 for emergency floor drains. Use 2 for other floor drains that would regularly be receiving water.
Hi Tom. If I know the total number of dfu of a building and I need the total flow in lps, do I simply divide by 2 and multiply by 0.06 lps? he result is a very high flow rate. What other conversion alternative is allowed? thanks
Good question. Sorry, I don't know the answer for that one.
I was taught you need to transition to 4'' from 3'' when going from building drain to building sewer is this necessary? or can you run a 3'' building sewer? i can't find where it says you can't. Thanks for the awesome videos!
I don't know of any code requirement for that transition. However, PVC Sewer pipe is not available in 3" so that is probably why we transition from 3 to 4 each time. Local jurisdictions may have additional requirements for the sewer being 4" which are not in the code.
Thanks for the video, very informative. I am remodeling a bathroom changing a tub to a shower. Most of the drains for pans etc are 2”, but existing line is 1 1/2”. Since the rules on showerheads are 2 gpm, do I need to change it to 2”?
No. 1 1/2” should be ok for a shower.
@@plumber-tom9470 thanks, I think some local codes require 2”, but I just went for plan review and mine doesn’t
Sounds good. @@billsnyder6945
HI Tom Thanks for your videos I learn many thing. Please this number I can found in a table 1 DFU = 7.48 GPM ?
That is not on the tables. But historically it is the basis for the tables
So let’s say I have two bathroom units on a second story draining down to the first floor on a 3” pipe, then that 3” runs to the main sewage line under the slab. Can I tie 7 more DFUs into the 3”?
On the tables in chapter 7 you will find then number of drainage fixture units for pipe sizes. It sounds like you should be fine if you have two bathroom groups and the other 7 DFUs. A bathroom group is 5 DFUs. And a 3" horizontal branch can handle 20 DFU. So it sounds like you have 17 DFU total and you should be fine.
When determining pipe size on building drain with 48.5 DFUs i see it should be 4”. But if i move past two branch lines that have 9.5 DFUs do i move to a 3”? Also if no slope is given what slop size should i use?
Yes you can decrease the building drain pipe size as the dfus carried by the pipe decrease. Reducing from 4" to 3" when toward the end of the horizontal branch can be a great way to save money because 4" fittings and pipe cost more than 3". When no slope is given, you can go on the minimum requirements on IPC Table 704.1.
Hey Tom I’m getting ready to take my exam and would love to chat with you a little before hand
Hello. I am available for success coaching. Here is a link if you want to schedule a time:
plumber-tom.mykajabi.com/offers/CLCztqaZ
1 DFU = 7.48 GPM , where that come from ? i think it's a huge number
1 cubic foot of water = 7.48 gallons DFUs were originally based on the movement of a cubic foot of water.
❤
Thanks. Hope it was helpful.
Watching this as a Non-American is really confused me with those Imperial unit🥲
Sorry! I wish the United States would go metric!