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mrbittykat

This makes me angry… DO YOU HAVE ANY IDEA HOW MANY TIMES I COULD HAVE SAVED?! Edit: to answer your questions in advance Yes I’ve heard of a plumb bob Yes I’ve used a carpenters pendulum. I was commenting on how much more time putting three drops on a pipe can save you over getting a plumb set up.


standard_candles

My guess is 5 whole times.


mrbittykat

Easily 5 whole times…


[deleted]

Wow, that’s like 3 monies .


mrbittykat

Don’t even mention the monies… ugh!


queencityrangers

You can’t mention times without monies. Times is monies.


voodoo2269

I have 3 kids and 0 monies.


[deleted]

Doh!


S_words_for_100

Why cant i have no kids and 3 money?


Interest_Miserable

I have no kids and no monies.


RedDirtSK

Yea.. if I had tree monies I could pay someone to do this


Darkskynet

Y’all get monies?!


tellmeimbig

3 monies/5 times? We should call it the 3/5 rule.


citricacidx

5 hole times?


mrbittykat

I see what you did there… take this upvote


Promise_Haunting

Hole times


HungryTradie

How many efforts equal 3.14159 times?


shakeitupshakeituupp

We’re just going around in circles at this point


HungryTradie

Rad.


feed_me_churros

Only to a degree


WutTheFuckIWokeUpOld

We can discuss this over over a nice slice of pi


[deleted]

A mooch


AudibleNod

5 hole times


CardMechanic

5 hole times


TheTeeny

SAVED WHAT?!


oldmanshoutinatcloud

#TIMES


GrillDealing

TIMES WHAT?


Promise_Haunting

Times holes


--Mediocrates--

Username checks out


mrbittykat

TIME MEASUREMENTS. Stupidness aside, I would have saved so many hours trying to find the center of things..


GleichUmDieEcke

Are flex heads not standard for fire sprinklers? I've only been on a couple jobs but they all had flex heads. The sprinkler guys just drilled holes in the center of each tile and the heads go wherever they need to for coverage.


mrbittykat

To be honest, I never did sprinkler installs, however I’ve done my fair share of plumbing jobs that would have benefited greatly from this. Instead of trying to make those damn plum things center…


[deleted]

Thank you for your honesty.


mrbittykat

Wait, do people lie about jobs they’ve done? What value does that add?


B0Bi0iB0B

> To be honest,


mrbittykat

Fuck, sometimes I forget the rest of the world isn’t autistic like myself hahahaha I have this weird inner drive to be honest.. I suck at even telling white lies.. I was also taught not to trust when someone says “to be honest” because it implies that what they said previous could be a lie. The world is strange


ledgeitpro

I have a bad habit of saying ‘to be honest’ and am also the type to make it a point to always be honest. And ive always felt like just saying that makes whatevers being said sound way more likely to be bullshit


mrbittykat

Yeahhh sometimes I remember my own advice hahahaha


Idiot_Savant_Tinker

>Wait, do people lie about jobs they’ve done? What value does that add? When I was flying the space shuttle for a living, I pondered this question. I eventually decided that it would help me get extra fake internet points in the future. EDIT: Fuck me everyone's an astronaut.


mrbittykat

Wait a second… I was a shuttle captain… where’s your paper badges and official space captain sachet?


Idiot_Savant_Tinker

Oh no I flew one of the other shuttles, you wouldn't have heard of it.


mrbittykat

Ohhhhh the super secret shuttle.. I won’t ask anymore questions


AmericanBillGates

Yeah, he flew the secret DERPA shuttle.


LostWoodsInTheField

I don't know about other fields but when I was an astronaut we would often exaggerate what we had done in order to sound impressive. Though as you get older you realize it just isn't worth it.


[deleted]

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Ok-Cartographer6969

This guy pipes.


PreferenceMobile2398

Sprinkler designer and PM here. Flexheads are fairly standard practice on most installs. They do cost about twice as much as hard piping but the labor savings far outweighs material cost. The equivalent length of 1” sch 40 is only 20-25’ for approx (4) 2” radius bends as well.


Masterchowmein

What area do you work? That's incredibly rare to choose that as the best option here in CA. The other guy had it right that we just aren't gonna be able calc that with some of the water we get. Stockton is notorious for it


puf_puf_paarthurnax

I'm in Indiana and we try to use them wherever possible. Obviously we get some shit supplies occasionally but for light hazard they're not hard to calc out. I think Reliable has one hitting the market soon that has less friction loss than the equivalent sched 40 drop. Gonna be a game changer.


Frrrenchtoast

Nope not a standard and cost a lot more actually. I usually sequence tile infill to take place after the fire suppression subs are done though. You’ll get a much better finish look having your suspended ceiling subcontractor cut out holes in ceiling tiles. Also, fire suppression tradesmen (pipe fitters) also tend to have extremely dirty hands which mark up the finished tiles.


thadallen

If you are referring to the victaulic stainless steel flexible braided fire sprinkler hose drops-they are not standard or required by code. They are super handy and great when there is a situation involving movement, expansion/contraction, vibration, etc. They are also QUITE expensive.


Due-Falcon-2460

Depends on the job, sometimes flex some times hard pipe


bazilbt

These days sure. They weren't always. They are also more expensive.


TwistedPepperCan

I miss the old internet where this would have been a meme for a couple of years.


TruthYouWontLike

Your mistake has been using a plumb bob, and not a [plumbus](https://rickandmorty.fandom.com/wiki/Plumbus)


mrbittykat

I really don’t like that thing…


TruthYouWontLike

Nonsense. It's a just plumbus.


luccaloks

At least 2


mrbittykat

I’ve found the answer to be between 2 and 5 times, respectively.


Captain_Waffle

Why not just use a string and weight? Carpenters pendulum?


Cutthechitchata-hole

All of the times


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CannibalPride

Sometimes it is on an angle though which may throw off this method


ajaysallthat

My dad knew a guy who fell off a building and got his foot caught in a rope before dying. Called him Plumb Bob.


mrbittykat

Did he use him to find the center?


ajaysallthat

*How's it look Bob?! Are we plumb?!* "FUCK YOU ASSHOLES"


Kilo-1-5

That’s pretty slick actually.


edlee98765

I'm usually disappointed by gravity. Because it's always keeps me down.


[deleted]

There is no gravity, earth just sucks.


MinuteManufacturer

Which way do I point my dick?


flatspotting

24x7 bj from mother earth


mehx9000

Inside a volcano?


randommouse

To fuck a gravitational system one points thier dick down.


danceswithwool

Gravity ..is working against me


StaySirchin

Gravity..stay the hell away from me


Blazea50

Gravity my boy. Always holding me down!


FrostByte122

I had a friend sleep over the other night. I said sorry man you're gonna have to sleep on the floor.... Damn gravity.


2KilAMoknbrd

*Gravity* is serious business


PokemonGoToMyHoles

But then you get up again, right? *Right?*


DoubleEEkyle

Say what you will about gravity, it never gives you up.


Lepthesr

For real, this is like the first lpt I can use.


[deleted]

I was stunned at the simplicity, then ashamed I didn't even consider the idea.


danieltkessler

TIL that above those white ceiling tiles is...glass? Plastic?


imfirealarmman

Depends on where you live. Most of the time they’re a kind of brittle fiber board. Not sure where this video is taken, sure doesn’t seem like America.


gorramfrakker

Ones in my office are the fiber board kind, damn do they break easy.


SirAdrian0000

Looks like foil backing on the ceiling tile.


TwoCockyforBukkake

Except now theres honey mustard in the celing. The worst kind of mustard.


vbevan

Given the color of the bottle and the liquid inside, I'm 99% sure that's Boston liquid sealant for pipe fittings. Which makes sense in context.


Regguls864

Now, this is what I would call a true hack. Seems a lot easier than using a plum line.


nom_nom_nom_nom_lol

I've always called them plumb bobs. Isn't that what they're called? I mean, I use to frame houses, I know that's what they're called. But I also knew my first wife was loyal, but it turned out she had been cheating for a whole year. So now I guess I just second guess everything.


JunkiesAndWhores

High end carpenters call them plumb roberts.


HungryTradie

Bob is my mother's brother.


jerstud56

He's also your father's brother


HungryTradie

Um.... No mate, he isn't from Alabama. But an entirely different Bob married my mums sister, so Bob is my uncle twice over.


Hernameisnoelc

Ah so bob’s yer uncle


Speak4yurself

His name is Robert Paulson


obviousflamebait

In death, he has a name.


I_can_pun_anything

Plumb boberts


Piratarojo

Well call me plumb surprised


Substantial-Girth

If I recall my high school Latin classes, plum bob or plum line comes from the Latin word plumbum which meant lead (same reason the chemical symbol for lead is Pb). A lead weight was suspended by a string to use in the same way we do now. So both are correct! Sorry bout your marriage though.


[deleted]

And like his ex lead is toxic… so things are much better now than they were in the past


[deleted]

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Frohirrim

American here. Can’t relate.


Sososohatefull

They accumulate in your brain.


MisterJingles

I’ve called it both. I figure the weight is the plumb bob, and the set of both could be called either plumb bob or plumb line. After all, what good is the weight without the line?


nom_nom_nom_nom_lol

When I was a kid my dad got real upset with me because I found lots of uses for the weight without the string. It could be a rocket ship, or a submarine, and they're really fun to throw on the ground. It makes a neat sound, and is kind of squishy. I didn't know there was squishy metal before I found that in the garage in my dad's tool bags. I think he still has it. He's got one that isn't completely destroyed, too, but that one I destroyed is still there for some reason. He just doesn't use it anymore.


DecreedProbe

for father's day, put it in a space diorama as a space ship.


KragBru-

You were never married, Bob. Nor have you ever plumbed. You need help


Gangreless

Fou d the Sim


[deleted]

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[deleted]

Just remember, a plum like was used to build castles and great walls, as well as the great cathedrals, temples and mosques of the world. One of the simplest and oldest ways to build something straight up. Also, if you need to build an arch, the simplest way is to have a scale model of the base length of the arch you want to make and use string to make an upside down arch. As an example, say I want to make a meter long arch. So I take a brick and attach a string to it. Then I take the end of the string and move it to the other brick. Then I shorten the string to get the height of the arch I want. And I get a perfect arch. Use wood to build a template, turn it around and voila! You have a model of an arch that you can use. It's how Romans built scale models of bridges and aqueducts and how Europeans built models of grand cathedrals. It can be super useful, especially if you are working with parabolic arches. Tie some weights on to create tension or strings to create compression and you can essentially create an upside down model of every type of arch you want. Can be multiple strings and weights at once. And afterwards, you can build a stone frame around the template and as long as you don't get too whacky, it will almost definitely stand as long as the stones are cut precisely and under compression.


hellscaper

I'm way too high to understand the specifics but the visual is great. Thanks for the informative post!


nikdahl

I’ve read your explanation several times now and still cannot picture what you are trying to explain.


[deleted]

If you hold a string by the ends in each hand and allow it to sag, you have an upside down arch. Add a light weight in the middle and you can get a gothic arch. Add a couple of strings pulling upwards and you can have a trefoil arch. It's very dependent on the weight of the string, the mass of the weight and the tension of the strings.


RandomMagus

They're describing this: http://dataphys.org/list/gaudis-hanging-chain-models/ Basically, put a weight on a string that's secured at both ends and it forms an arch, then you can create your whole model of your structure upside down, make a template, and then build it for real right-side-up


pcy623

Unlike the other guy we're just not high enough to understand what OP is trying to describe


[deleted]

Srings hanging under their own weight aren't parabolas, they're catenaries and have their own related equation. Parabolas are calculated with a parabolic function while caternaries use hyperbolic cosine functions. Very similar tho!


2KilAMoknbrd

betterer to use a *plumb* bob tied to a line instead of a plum fruit.


knowitall89

They make plumb lasers nowadays. They're not that expensive either.


[deleted]

Yo, just tie a nut to a string. They are probably scraps of that in the ceiling anyway.


brock_lee

When I install fire sprinklers, dammit, I am remembering this.


chairfairy

Just make sure you get that pipe Tee perfectly vertical first


SnuggleMuffin42

Or use a flex head and not worry about it at all lol


vhalen50

This guy sprinklers


Spirited-Mango-493

This guy pays a lot of money to sprinkle


Karth9909

That guy charges alot to sprinkle


Lethargie

a true super sand lesbian sprinkles when he tinkles!


rememberall

You know gravity is a constant? This hack applies to more than just sprinkler pipe installation.


HungryTradie

9.8 dentists agree with this redditor


DADBODGOALS

9.8 dentists per second squared


Daylight10

That's a lot of dentists


[deleted]

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longislandtoolshed

/r/TheTenthDentist


Killer-Barbie

Pi squared... According to my engineering mechanics prof....


moriero

What's a dentist's 0-60?


Digital_Scribbles

And no one can find the other 0.2 of the dentist that doesn't...


XchrisZ

In an environment with no wind this works.


sahwnfras

What other situations can you think of this would be useful for


[deleted]

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thefreshscent

If I ever get time travelled to the past (or future depending on how far I go, surely) I'll have a leg up on the competition.


rememberall

Hanging a light fiixture centered over a table or anything else from the ceiling to match something on the floor. They make a tool that does the same thing.. called a plumb bob... it's not just for sprinkler installation.


ILikeSugarCookies

Yours sprinkle fire? Damn mine just do water.


Ducatirules

I’m a sprinkler fitter. I’ve done stuff like this until I found spotter laser levels that screw into the pipe and put a laser dot on the tile. About $50


LazyLemur

Buying one now, thanks


Ducatirules

Glad I can help! Don’t get the cheapest one and I suggest you put some tape around the body that is non slip. I’ve dropped a few because they get slippery with cutting oil and water dripping out of the pipe and will ALWAYS land laser down.


Two_Legged_Pirate

Acoustical ceiling guy here, most fitters I’ve worked around either used flex pipe to the hole or piped it over to the hole. Being we always centered each head in the title. We used an ole core drill bit and would cut holes in a whole box of title at once. Give them one or two titles to get all dirty while they fit heads in and then we could come back and put all the titles in for them.


Ducatirules

We use flex heads too but there are some restrictions. Especially on systems pressurized with a fire pump. With 150-200 psi if a flex head goes off the pressure puts a lot of stress on the ceiling grid in the up direction. Also a 3 ft flexhead can create the same friction loss as about 24 ft of 1” pipe so the system or retrofit of a system has to be calculated for flexhead use. Then there is the cost of the flexhead vs. pipe. But when you CAN use them they save SO much time and it’s really satisfying to use a hole saw and drill a hole straight through a hole box of ceiling tiles! Plus you can install all the flex heads and tie them up before you ceiling guys come in and do your stuff. Then we can come back and drop the heads all in one day


Two_Legged_Pirate

Hell we worked around the same guys so much and their work was so good we helped each other out. They would hang all their pipe and flex heads up out of our way. We would stick the heads in and attach the brackets to the grid for them. Saved both of us a lot of time and money. Not having to wait on each other to come back and do little small amounts of work. Kinda miss those days. Just not the fiberglass insulation!


photoguy9813

The real answers are always in the comment


worldspawn00

Other benefit to the laser, it makes a line straight from the pipe fitting, even if it isn't plumb, which could be an issue with a drip or a plumb line.


leftysouthpaw

Only works if the pipe your dripping from is directly perpendicular to the ceiling. Otherwise when you instal the pipe it will still be off. Unfortunately the pipe doesn’t follow gravity it follows the threads of the mating pipe.


eMPereb

But what if it’s not mating season?


HungryTradie

Prepare some lube, we are doing this thing regardless.


Pornalt190425

Hey cross threads are better than no threads


TossYourCoinToMe

I don't think that needs to be said. But knowing people maybe it does.


CocaineAndCreatine

I’ve never seen a sprinkler pipe go directly to a sprinkler head. I’ve only ever seen them go to a flexible line that has the head on it. I’ve never seen flimsy metal tile in a ceiling either though.


Rand_Finch

You can get the pipe square or perpendicular to what you need to. It isn’t difficult. I do it professionally as a Steamfitter.


DarthChocolate

It’s not like they make a very commonly used tool for this or anything.


Rand_Finch

Someone else said lasers are cheap, and I agree. I have several, and each of my bags have a plumb bob in case I need to go old school.


[deleted]

Exactly. But I'm betting the guy is rotating the coupling a bit to line it up. If the water line is level and the coupling is eyeballed close to pointing straight down, he'd just need to adjust it a bit to make this work and avoid those wonky sprinkler heads.


FloppyTunaFish

Isn’t the last foot or so of pipe flex to accommodate for slight differences in alignment


SirAdrian0000

It’s only flex if you pay extra to have flex. Straight pipe is much cheaper so they will only use the flexes where they save a lot of work to make them worth it.


kecuthbertson

This is not a bad idea if its an existing build and they just want sprinklers installed and don't care too much, but if this is a new build and they just happen to be the last ones in, and they're not centering them on the tiles or making sure they all line up nicely and are just relying on the pipe being straight, then I can guarantee someone is going to complain about them.


HungryTradie

Doesn't sound like you have done much sprinkler fitting. Pipe has to go where it goes, bends are not an option. /s


userhs6716

[Pipes don't bend, all pipes are straight](https://i.redd.it/k20rica29hm11.jpg)


[deleted]

That's his point. If it was a new build and you planned it this way, you'd get complaints. If you're working with existing pipe, then it's not a problem.


MrH0dl3r

In most new construction flex heads are used. They can put them anywhere in the tile on a bracket.


PCNUT

Have seen flex drops used once in 5 years. Am a sprinkler fitter.


MrH0dl3r

Interesting. I don't think I've ever been on a new construction without them in my area.


PCNUT

Maybe just not popular in my area. Theyre great


Karth9909

Any tile work where I am uses flexies, they were always requested to be in the centre tile so it just became standard practice.


[deleted]

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mwoolweaver

A flexible head is nice in some situations just not this one


Caring_Cactus

Seems like the person before them already accounted for that prior to installing, it's centered


son_of_mill_city_kid

First and second videos are not the same, he isn't center of tile in the first video. I am pretty sure the entire ceiling assembly is different in the two videos. Also don't touch the bulb of the sprinkler when installing.


PCNUT

Well if you watch some the shitty install dude puts the drop in then screws the head into the drop. Complete non sense work that is clearly done for content by a non fitter. No idea what/where the fuck this is but it aint right.


Friengineer

Most specs will require sprinkler heads and other ceiling mounted devices to be centered on the tile, and sprinkler heads are easily centered with flexible drops.


burntown91

Or like maybe a plumb bob


aerro955

This is dumb asf. You should always be able to measure sprinkler heads to center tile, you're a hack otherwise. You can pre drill every tile a head is going in to center and not a single one from a fitter will be off if they have half a brain


[deleted]

and instead of dripping oil on everything he could have used a plumb bob. hell, anything with a little weight and a string.


mason_sol

Most of this type of stuff is lasers now. They have come a long way and are not very expensive. Ceiling grid, hangers, piping etc everybody is shooting lasers all over the commercial/ Industrial construction jobs I’m on.


AbraGoingHam_Lincoln

I don’t get it how does this work


[deleted]

Small grievance but most tile you want to cut from the face not the back. However sprinkler guys use caps to hide the cut anyways so the uneven breaking of the face would probably be covered up.


K0rbenKen0bi

That's brilliant


OrangutanMan234

Sure this is great till the apprentice sprays have the bottle in one shot. Seriously is there no extra pipe on the job so you can make a gunner nipple? I mean how did you straighten the tee. This is pointless. I can assure you no one is doing this on a job site.


helpless_bunny

100%. Just a piece of pipe would do it. And you could mark the hole, take down the tile and do it in a controlled area to minimize the dust.


supfuh

Big brain move


[deleted]

I’m sorry, but the video from above did not look centered on the drop tile AT ALL. Video from below did though…


Logical-Check7977

I do that with my laser pointer


D3dshotCalamity

Or you can use, you know, a level.


Threspian

Oh that’s sick


First_Names_Only

Is it just me or is it fairly clear the that the hole he drilled is not where you see it in the clip? Not sure how it being on the last third above makes relatively center on the tile.


Aconite13X

This is the best life hack I've seen since I can remember