The EASIEST way to calculate a 45° offset! | GOT2LEARN
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- Опубліковано 28 чер 2024
- In this video, i'll clarify how to calculate a 45° offset for all your plumbing tasks the EASIEST way possible!
Cast iron soil fittings for drain, waste and vents:
goo.gl/DJZis8
Copper fittings :
goo.gl/b8CmsM
SCH-40 PVC fittings:
goo.gl/UFnVKx
Logard storm drain fittings :
goo.gl/rCvcf4
ABS fittings:
goo.gl/rTGdau
SDR-35 underground system fittings:
goo.gl/7h6H1H
Let me know what you think by commenting and rating this video!
DISCLAIMER: Got2Learn is NOT responsible for any damage done to a property of which the plumbing wasn't done by a professional, I do not recommend doing your own plumbing if you are unsure about what you are doing, always hire a LICENSED contractor when doing any type of plumbing so you can be covered by insurances if something does happen, these videos are for entertainment purposes only!
I’m a union plumber and I was watching this and waiting for it to be wrong but it’s right on! Good job!
For anyone saying this is wrong or it takes too long to do, you unfortunately did not have proper training.
Gkad to hear a union guy say that, thanks a bunch buddy and please share around ;)
Thanks so much Alex for the positive vibes!!!!
I'll be honest with you. I'm a residential plumber and I can do the off set calculations as well but honestly speaking, I eye ball 99% of my offsets and my plumbing looks meticulous every time with much much faster turnaround.
Nice video!
In commercial eye balling ain't good enough lol
;)
As a plumber, I’m so very thankful to see people making videos about these tips. You’re very much the G.O.A.T
Wowww thank you sooo much!!!
As a person who majored in mathematics, I learned decades ago to go a tradesman to learn how to use said math easily. I've learned so many tricks that bypasses the equations and boils it down to simple math over the years. Simply brilliant. Even though I have college degrees, I couldn't live without the knowledge of tradesmen. Thanks so much for sharing.
Your comment is very appreciated Steven, thank you so much and have a great day!
It's great to see appreciation to the skilled tradesman. Most kids these days are bombarded with, "you have to go to a 4 year college". That has created a skill gap. I am a plumbing/electrical Forman for a pool builder and skilled labors are hard to come by.
I hated math in school. Never clicked for me. Been a fitter for years and people think I’m a scientist when I use these formulas. I’ve learned more in 20 years in the trades than I could have dreamed of in high school. It’s amazing the effort you put forth to keep food in your mouth and a roof over your head. Not to mention a sense of security and comfort.
Thanks for laying it all out speaking plainly and to the point. Perfect.
My pleasure :)
This is a start to becoming a professional pipe fitter. 🤗 thanks pal.
Yes, you are very welcome!
GT, you nailed it, thank you more than you know! I do not get all the multiple-minute tutorials that could be summed up in a few minutes and yet have little to no practical help. A guy has to get to it to get the work done and your real life applications are very much appreciated. God bless you for sharing your experience
You are most welcome!!!
Thank you, don't forget to share, it really helps the channel!
Bro, your the best I’m studying plumbing and always refer back to your videos for better visual understanding. Keep up the good work..
Awesome man 🤟🤟🤟
Im a residential plumber with no union or trade school experience and I use the formulas for 22.5, 45, and 60 degree offsets on a daily basis. I've found it helpful to not only memorize the formulas for offset and setback, but to download onto my phone the takeoff charts for fittings from the manufacturers. It's very helpful if not imperative to have an accurate fitting take off when using a multiplier or divisor, especially when all your holes are drilled and your using center to center measurements with large fittings. Once you understand how to apply these formulas, you'll find that its not only quicker to use math, but yields a higher quality product. I do remodels for the most part and when I start ripping open drywall to expose old work which I have to tie into its very apparent wether someone got it right by eye or cared enough to use basic plumbing math. Not only does plumbing installed by eye look sloppy, but the pipes themselves are often under stress which results in premature failure. Practice makes permanent. Quantity over quality, or "getting er dun", is nothing more than a race to the bottom. Take pride in the quality of your work, as it speaks volumes about you when you are not around. Great video by the way!
I'm a plumber and although I have a pretty good eyeball it pains me to know my 45s are not 100% spot on. I know this formula but an off set is not the common Scenario to be mr. exacto. I was hoping to find the formula to find 2 pipes at a 90 degree angle. For example I'm going from a diagonal pipe to a vertical pipe and want to use two 45s. How do I get the right size pipe. Do I need two surfaces to measer or what. I'd really like an easy solution.
Zach Bishop ok not to sound rude but a 90 degree angle is literally an L you just need a 90 degree fitting, buy some pvc and play around until you find something that works
Why don’t you guys just use math? Like 30* would be multiplied by 2
Or 45* would be multiplied by 1.4?
@@millionairescloset2310 I do! The formulas I was referring to are what you mentioned. I grit my teeth a little when I see anyone fitting pipe and making offsets without math. Why you wouldn't use it is beyond me!
They love the race to bottom bro
Awesome video, I teach a pre-apprenticeship program and I'm adding this video to my curriculum! Well done!
Super glad to hear that, tell your students to subscribe and give the videos a thumbs up, it helps the channel immensely!!!
I promise I'll come back to this video and take notes tomorrow morning, because now it's close to midnight and that glass of wine I had earlier doesn't help :)) Thank you for your great tutorials!
I'll be waiting, thanks Catalin!
Excellent explanation! I have used this at work, I have it memorized. Used to have the multiplier for a 22-1/2 degree offset memorized too, but forgot that one over the years.
For anyone wondering why you multiply by 1.414. It's because 1.414 is the hypotenuse of a right angle triangle where the two short sides have a value of 1.
So the diagonal measurement of a 1ft square would be 1.414 ft. And for a 1 meter square would be 1.414 meters etc.
💯🙏
Love you bro
Best chanel yo. I been saudering fan coils and youve helped me alot wit ur tricks n tips. Thanks for this vid too man. Keep up the good work
Thanks a bunch Alex, your always as loyal ;)
how did i miss this one ..... another great one!!!
Thanksss eric!!!
Ooh, I hadn't watched it yet because I didn't think this was gonna be for more than just copper. Awesome!
Anything that needs a 45 degree offset, this trick works, simple math ;)
@@Got2Learn well, yeah, makes sense when you put it that way 😅
I'm no plumber and I have not touched that stuff ever before.
But am now forced to learn because of this one vanity in my garage. I hate the way all the plumbing is just... exposed. Ugh.
It'll be easy to you soon ;)
Sir your this video is so informative. Thanks for sharing your knowledge with us.🙏
🙏🙏🙏
I do tube bending too, and you have to keep up and not lose practice. I always write my common formulas inside of my hard hat. Rolling offsets and running multiple racks of tubing around columns and beams is critical to make it look uniform.
I used to use a tubing bender frequently myself, it looks awesome when done properly. I recently dug out my 3/4" bender to do some work at my house, I hadn't used it in a decade, but I managed to remember enough to get the job done perfectly. You're right about writing stuff down as I found out, but you don't think about that when you use them frequently.
Best channel 👏🏻👏🏻🤗🤗 always well explained! Good work keep it up you will be very successful 💙
Thank you!!!
Thank you for breaking this down 👍🏻
Thanks for that information
1.41 greater than the straight line distance, center to center.
Then reduce from centers to bell end. I remember this from my journeymans exam.
Thanks Bruce Richards👍
;)
Good stuff bro. Thanks
😇
So helpful!!!
Thx so much, please share :)
Simple description, thanks
🤘🤘🤘
Amazing video
Thanks a lot, please like and share the video if you can it helps keep the channel healthy ;)
very informative. Imagine if you are to cut /fit pipe with a 12 inch diameter and a 6mm wall. you just cant move them around because its heavy. this is where the correct calculation comes in. thanks Go2Learn
Percisely ;)
Thank you
I had to make a huge offset on 4” pipe. I didn’t feel like eyeballing it so I came here and just sent it and it was damn perfect.
BOOM!
Perfect video:) chose simple numbers so we can learn the concept quickly
🤘🤘🤘
Awesome video
Joe R thanks
Glad you enjoyed it
Good stuff
Thanks a lot Iron, please like and share the video if you can it helps keep the channel healthy ;)
Simple good job
Thank you, don't forget to share, it really helps the channel!
For those that work hanging duct work. are this formulas work the same for duct? I always struggle when it comes to use forty-fives
Can you do a 22.5 degree offset please it would be very helpful
Thanks!
🙏🙏🙏
I've not seen that 1.4142 trick before, very handy as a welder fabricator. Is there anymore handy numerical tips.
If you want to make something square. Measure down one side 3 and the other side 4 and the measurement between those two points is 5. Of course you can use multiplayer of the 3,4,5 like 30,40,50, 3ft ,4ft,5ft etc. handy for something large or laying out on the floor.
Would you do the exact same thing for a 90 degree angle and so on?
Great. Never knew the correct and east way
Now you know ;) please share and give it a thumbs up!!!
Unreal, I have re-plumbed 2 dozen HWT's in my building just because the dumbass plumbers just thru in unnecessary joints or installed multiple unneeded joints to burn up parts they had in their boxes resulting in some seriously f'ed up configurations. When I started re plumbing these lines (option to my owners in my condo building) I always eliminate as many 90's as I can ( why use a fitting the stops the water to change direction when 45's are a mild turn offering better pressure) and I've always rough fitted my pipes because I had no other way to gauge the angle. Well done!
Thanks buddy, really appreciate it ;)
Helpful 👏
Glad you think so!!
Thanks explained is too good thanks
Thanks!!
@@Got2Learn your thanks you give me knowledge about my work
Glad I was able to help out ;)
I searched all of your videos and noticed that you do not have any on bending copper pipe. Do you not recommend bending and, instead, sticking to available couplers in various angles (as used in this video)? I've heard there are benefits to bending, so curious about your thoughts.
Thank you for all the excellent videos. I've learned so much (and applied it) from you!
Here in Canada we don't bend that much, no idea why lol, but yes I do recommend it :)
Awesome 😎
I like the super accurate method known as holding it up and eyeballing it 😂💀
Can you make a video of how to layout cast iron in the ceiling (wye's, 45's,tee's, subtracting fitting allowances), parallel offset?
I second that
yes do that video please
Anything for 3/8 stainless steel hydraulic tubing?
Never did any of that, but the idea stays the same in terms of calculations.
Good shit
Does it work on spiral duct?
Classes dont even show you how to do it that well thank you
You are welcome!
nice
Wondering if this also works for round duct
Math is not choosy, so yes 😇👍
For some reason the copper website isn’t working awesome video thank you!
Can you do a rolling offset please ?
Yes, I will be working on that eventually ;)
"A wall or what not" spoken like a true tradesman
See, there really is some reason to stay awake in math class. You probably saw the Pythagorean theorem first in junior high math. Great job.
👌👌👌
Great
Great to hear! I'd love if you can share with your friends and family, it would help keep this channel running healthy, thx again!!
Starting apprentice job before i become electrician (odd i know) so i came here before the job to ensure i have basic knowledge. Thank you
Awesome, I am glad I could help out, don't forget to share if you can Peter :)
Where is the series chart for fitings
Just put it in the description box, thank you!
What if we don’t have pipe centers ? For example New construction in my base meant
So I can’t measure from a wall to a pipe
Do one on threaded pipe
Is there a current link for the copper pipes catalogue? The one posted says 404 error
Also the reason why he took the time todo the math is because waste cost/equals to loss $$$ if you are the business owner. This gives you 100% no waste which in return adds/equals more $$$. You save by having no waste. Even thoe it may only be a inch or few in waste to fit the pipe in a tight place u may cut it down close to the length/size needed where u can then make a mark to where it needs to be cut. Which then will leave you with left overs which equals waste which is wasted money $$$ on not needed waste. Times that by a 1001 over a year and that little waste adds up very fast my friend which is a good amount of $$$. Hope this helps explain more to those who dont run or understand what little things help business owners save and make more $$$.
Couldn't be better explained than this. It's not because you use this trick 5 times in a year that you'll see a difference, it's a long term thing, and trust me it's sooooo much easier to do it this say!
I have a question regarding the pipes being parallel, how would you factor in a height difference? Thx in advance !
By using a horizontal reference such as a lazer level.
@@Got2LearnI think they meant if pipe 1 was a 8’ and pipe 2 was at 8’6””
For black iron, the fitting allowance is Face to Center minus the thread engagement right? I cant find any comprehensive charts on thread engagement though. I used to have some but cant locate them. Im back in trade school and Im pulling my hair out.
That Bibby St.Croix PDF has two measurements. A and R. R isnt the fitting allowance is it??
What I used to do is take each size fitting on the job we were using and make my own chart as a reference as each threading machine has a small difference when threading, I like doing it that way.
Ok thanks a lot have a great night
Same Mike!! 💤
Nice but you forgot ea fittings sometimes have different lip depths. Which could cause u to cut short. So always make sure your lip depth is not less then the amount your going to subtract on either side ;)
G3sus christ how do people not know the difference between then and than?
I'm going to try this with duct work. I usually use a square or a framing square to figure it.
It'll be even easier man 😉
When your doing duct work we always use the owl method.
Offset x width = length
@@byoung1910divide length no?
Hi sir u vods is good but I need yelbo to pipe santer to santer
I have 45 & 90 degrees marked on my pipe bender , measure the distance and bend both without any drama .
Lol, good one ;)
I mean is there any other way to figure out a 45 set? Next we want to see a video of a rolling 45 set. Thanks
Ok I'll try to make a video on that, thanks ;)
C-C(-takeoff) x1.414-equals = you piece in between
Hey Got2Learn, I once saw a plumber measure a 45 offset but he pulled out his tape, measured it did a quick math in the head and had a piece ready to cut, is there an easier way? I doubt he did all the math in less than 8 seconds
It's probably this method, but if you have a round number like 10" for example, it's easy to multiply by 1.4142 and then remove 2x the penetration on both fittings
Pith a gorean is rolling over in his grave.
Sure thing!
Came here to say that.
Lmfao
you meant pith agoras
I cannot stop laughing at this comment and the whole situation.
Love the accent lawl
Thx
How do you find the end to end on that pipe?
Which pipe?
@@Got2Learn the one on the video, but any pipe really. It's a question on a test that I took. I solved for the travel like you showed in you lesson but then it asked what was the end-to-end length of the pipe in the diagram. Sorry if I can't make it clearer than that, still a newbie.
@@Got2Learn the question had a 16 in offset and I had to solve for the travel which I did. 22.614 but the it asked for the end to end length of the pipe. Hope that makes sense. Thank you for responding.
Add me on Facebook.
I would actually use a pipe bender for the whole run
That to is a good option.
This is hard copper not soft copper tubing
@@foodandfuntraveler5859 what does that matter you can still bend it, it is copper not brittle
Always on cast-iron right now and... A lot of deviations between floors..... Yeah 45° ahoy!!! (Beaucoup d'équilibrage/ventilation)
Ark, you guys need the Hilti GPS system ;)
how did u get the 11.30''?
Late answer to this, but the answer is technically 11.296 (since he used 1.412). So the distance between each pipe was 8". 8" x 1.412 = 11.296.
11.296 rounded up is 11.30 which converted from decimal to inches would be about 11 & 5/16"
The copper fitting link is not loading 😢
35 years as an electrician and always tried to do 30 degree offsets because the length between bends is always twice the length of the offset needed. Easy Peasy ! ( lazy electrician 😉 ) .
😉
I’m completely new to plumbing. Just a preface to my ignorance so forgive me if I ask something dumb. I’m trying to get into my first year apprenticeship and I’m consuming as much knowledge as I can. So, where did you get the 1.4142? Or is that just the standard measurement?
That's just what they teach in school basically ;)
1.4142 !
Have a nice day !
Stick your fitting on one end. Stick a slightly longer piece of pipe in it and lay it over the other end. Mark where the inside edges meet. Fudge factor for the slight rotation of the fitting and small gap between edges within the fitting(this takes experience but if you always try to use math, you will never get that experience. It definitely pays off later though). Cut the pipes and you're done.
Wall must be straight, mark on fitting must be centered, tape must stay on mark etc. I used to use levels and math and such, but the reality is, your eye doesn't lie, and when you do it enough, you can eyeball it with a few tricks. When the tape is at odds with my eye, I've learned to take my eye as the final decision. The tape has screwed me more than once or 500 times. Small errors within the measuring process add up, and can put you way out.
This won't work with 10" black steel.
@@Got2Learn I'm an irrigator so I only work with copper and PVC. Why doesn't it work with black steel?
@@atypical_moto oh it's more the size than the pipe, could be asbestos too.
How can you make up multiple sets over long distances from both sides if you don't use maths...you can only keep joing parts in situ otherwise otherwise you will end up way off!
Where can I find that chart?
In the description box below ;)
Got2Play Jesus I need to stop drinking and watching youtube. Thanks lol
Hehe you are welcome buddy ;)
I used a framing square n tape measure to figure 45 offset retired welder n fabricator.
Works too!
This is unrelated to the video. But what is an air gap and is it something common that plumbers have to keep in mind?
Where does 1.41 come from?
The math never lies
The only way to run pipe
Yes!
👍👍👍👍👍👍
Gracias ;)
But when do you use .707?
I think the .707 works as well, I just nevered used it ;)
.707 is for figuring the length of a side if you know the hypotenuse.
Sit×run
KitnA hai
I like the idea that he "took the time to do the math", as if only we had a device that could compute such a calculation for us. BTW credit to ol' Pythagoras for the assist. ;)
Thanks Scuba I am very lucky to have you onboard :)
@@Got2Learn I'm here to serve!
ScubaCat3
But there is. It’s call a 45 degree folding ruler. Inches on one side, put your finger on the offset measurement on the inches side and look on the 45 side and there is the hypotenuse. $ 12 🌺
8 *1.4142 =11.3136 how can I change to a fraction?
Multiply .3136 by 16 over 16 and you get 5/16 so your answer is 11 and 5/16 end to end .minus your fitting allowance
I'm doing something in trade school and it's so hard. I can't measure it and put it together. Made me so stressed.
Distance X 1.4142 - diameter of pipe = length to cut the pipe
Works perfectly center to center
Good English without eating words
perhaps you could explain the math as to how you came up with the 1.4142. good for a draftsman to know but i just eyeball it
Pythagorean theorem. A squared + b squared = C squared.
10 3/10” right?
I always just stuck a 45 on point a and point b and then measured in between them. Idk why you would need all this math lol
Well, for 1/2" piping with a 1 foot diagonal it can be done your way, but if you are doing a cast iron line or 10" asbestos storm drain, your way cannot be used, which is why the maths are necessary to know ;)
@@Got2Learn good point, that makes sense. I appreciate the response.
Not a problem bud ;)
Me too. It works for most regular residential sizes.
Why you multiplied by 1.414 where it's comes from??
Hypothenus.
if c^2=a^2+b^2 , for 45º a=b so c= sqroot(a^2+a^2) -> c=sqroot(a^2*(1^2+1^2)) -> c=a*sqroot(1+1) = a*sqroot(2) = a*1.414
It's the square root of 2
All right triangles with a 45 have the same relationship between the lengths of the sides, the two short sides are the same and can be multiplied by the square root of 2 to find the long side. I use 1.414, but the videos is just more accurate
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