In the replies to this comment i'll be taking names for the possum.

In before the view count overtakes the frame rate!

Hello! Engineer for a company that makes sprinkley bois here! I loved the graphic that popped up at 0:52 about the colors and temperatures. The "glassy, juicy ampules" (lol Dan) are called bulbs, and like the graphic shows, the color indicates the burst temperature. Several factors determine what temp bulbs you want to install, the main one being height. For example, the sprinklers at the top of a warehouse need to burst at a lower temp because of how far away the fire is, compared with a standard residential or office ceiling height. Sprinklers can also activate via "links", which are basically little plate springs that are held at tension by solder paste. The fire melts the solder, the spring explodes outward, water comes out. The explosive quality of the bulb or link is important, because you have to get everything out of the way of the water flow. Some sprinklers, known as nozzles, don't have anything holding the water back! More on that in a minute! One last thing: if you're in a building with a flat ceiling and don't see any sprinklers, look for round discs instead. These are known as coverplates, and they provide an aesthetically pleasing way to cover a sprinkler from view! They can be color-matched to any ceiling, and like links, contain a solder paste that makes them pop off and expose the sprinkler at a much lower temperature than would actually trigger the sprinklers. Couple of myths: first one was one I used to think before working here is that the round bit on the sprinkler spins around as it goes off. Sadly not true for any sprinkler! That bit is called the deflector, and it's specifically designed to spread water in a certain pattern. Deflectors vary based on many factors, but primarily where the sprinkler is installed and the orientation in which it's installed. Many hotels use sidewall sprinklers with very different deflectors than the one in this video. Another big one: sprinklers always have water immediately behind them in their pipes, like Gav and Dan's in this video. Also not true! SOME systems are like that, and those are basic wet deluge systems. The problem with them is that it's relatively easy to have an accidental activation, which is the SECOND worst thing a sprinkler can do, because water from sprinklers can cause lots of damage, but not nearly as much as a fire. The worst thing is obviously if there IS a fire and the sprinkler doesn't activate. All sprinkler companies go through GREAT measures to make sure neither of these things ever happen! Back to water in the pipes: systems that do NOT constantly have water behind the sprinklers are known as dry systems, and they rely on a trigger mechanism to open the VALVE on the water main that holds back water to the system. The trigger is typically one of three things: an electronic signal from a fire/smoke detector, a wet pilot line, or a dry pilot line. Pilot lines are located with the sprinklers in the protection area, and are pressurized with either water or air (wet and dry). When the fire trips the pilot line, the pressure on the line goes away, which trips the valve to open and converts the dry system into a wet system, but only nozzle sprinklers go off at this point. Most wait until the bulb or link sprinklers trip. Obviously the pilot lines trigger at a lower temp than the sprinklers; that way the sprinklers always have water behind them when they trip. Some valves have multiple of these fail-safes, to further ensure against accidental activation! Any questions? I promise I can either answer you myself, or get a nice, smart coworker to help me out! Hope everyone is having a great day! 😊

aren't we gonna talk about how perfectly alinged his screams are with the water at 1:19

"After feasting off the hammock, the possum leaves" 😂😂😂😂😂

That shows how fast glass breaks... Even at 103.000 FPS it looks instantaneous!

these guys go from professional studios to there backyard like every other month and its hilarious

8/10 good slow mo video 11/10 possum footage

Sprinkler: explodes Dan: has a seizure

When can we expect 'Possum eats a hammock at 100,000fps'?

"68 degrees C, or 155... American things"

Being a sprinkler fitter myself, I can tell you that a sprinkler system usually has a normal pressure of roughly 60 psi, giving a much wider spread of water.

No one: Dan: “OoRgH”

i love how once again Dan takes the brunt of things and Gav is all "oh, bother me, a droplet has just hit my shoe. how outrageous!"

"After feasting on the hammock, the possum leaves.....leaving it in tatters. "😂😂

I always thought that spiky thing spun lol.

The compilation of Dan’s flinches and “OH!”s at the end MAY or may not have been the best/funniest part of this video😂😂

Loved this. Excellent job on the shots. Perfectly framed and informative.

Fire Sprinkler fitter here 🖐️ Thanks for highlighting our industry. Fire Sprinklers save lives!

I’ve also heard from building facility guys that the water that comes out of real sprinklers in building is usually gross old stale rusty water that’s been there stagnant for however long, and it’s not like in the movies where if you set one off, they all go off, each sprinkler is it’s own system

I worked in a warehouse where someone hit a sprinkler head with his fork-lift. The first 983,645 gallons shot out in about 3 seconds and all of it was muddy brown with rusty water. The fire department had to come to turn it off, and the driver was sent out for a drug test XD

0:55 "155 American...things." Nailed it!

0:22 I love the fact that you're flexing that FLEX 4K

I love that they called the possum cute. Possums are good, tick-eating friends.

Finally someone talking units that I relate to and not “some american things”

The average shower head releases about 15 Liters per minute. A fire suppression sprinkler releases around 150 liters per minute. Hooking up a backyard garden hose to a fire sprinkler doesn't begin to do it justice.

Slow mo possum eating hammock for next video?

i love vids like this. just them being curious and make it interesting. produced in a backyard and not TOO overly produced. just bloody good

I love their camera quality n slow motion effect, makes the running water look like crystal

1 millions dollars BUT you have to walk barefoot in Gavin’s backyard

Just casually waving about $100k plus of camera at the beginning there... Spot on David Attenborough impression at the end with the possum.

I always thought that the metal "arms" would spin but that's not how it works

I’ve lost count of how many times Gav has said “look at your face” 😂

I actually install these for a living and it's interesting seeing these actually go off in slow motion. And as far as the air that they are talking about, you're supposed to bleed the air before putting into service.

Do a partnership with Coyote Peterson and get a bee sting in slow-mo!

This channel is the only one I know that has the best camera quality

One of my favorite videos because 1) learning 2) Dan making a noise every time is hilarious 3) POSSUM

Guys how about rubber bands hitting the surface of water in slow motion?!!

Am I the only one who likes these “old school” vids more than Planet Slow Mo??!😂😂😂

Them: "You can see this at 103,000 frames per second!" Me, setting the video to .25 speed and getting 412,000fps: "Pathetic...."

I will always loved to see water in slowmo. Always just so cool. I also I did learn a lot! Agree Gavin! Favorite types of videos!! 😄

0:54 155... American... things. Me: *Laughs in kelvin*

I love your 'Planet Earth' narrator voice, Gav

@4:41, @5:35 with the music and view. Wow!!! What in the beautiful is that??? Why do I feel joy?? Am I about to cry?

The flowers behind them at the end were so gorgeous and magical!

I’ve actually always wondered how those things worked

I spent my whole life thinking that the metal fan thing spins 🤦‍♂️

water will forever be the greatest thing to film in slow mo, with fire being a super close second. i cant believe the same guy that is famous for bird noises and words like gubbins and munge, is here captivating me with these videos. good on ya Gav and Dan!

Was I the only one that was totally mesmerized by how the water moved in slow motion? I rewind the video while I was watching it so many times. Awesome video and very informative!

next video: "we are going to film a black hole in slow mo!" gav be like: "small lighting issues there..."

Possum must be a lady stealing your hammock fluff to make a nest. so there's that if it helps lol

I never owned one and I always thought they worked with electrical fire/smoke sensors.

i am actually a sprinkler fitter in Canada. judging by the size of that head, at proper system pressure, you would get roughly 10ft radius of water spray coverage. The air you see, even with the slow mo would be so fast that you wouldn't really notice it. You just go from dry to wet. Feel free to call the possum Yox.

0:55 a hundred and fifty-five...American...things. 🤣🤣🤣🤣🤣🤣🤣🤣

Love the video. Live how Dan had a different sound for each explosion. Thanks for the great education.

the reactions to the ampoule popping were priceless... but that was nothing next to the Attenborough impersonation for the possum.

I love seeing stuff like this. Who would've thought the sprinkler worked like that? A lot of people probably... But I've just never seen it.

I would love to see lightbulbs getting destroyed by putting to much voltage trough them. We do have 20 to 2000W at our theater and I always wondered how it looks when they go in slowmo. In real-time it’s just a bright flash

Glad to see someone do a video on a sprinkler head. I install these all the time for my sprinkler company

After watching your video of you adding the SFX / Foley sounds you add in these videos. I can't help but start to tune in on it more. And I gotta say. Adding those DEFINITELY makes these more aesthetically pleasing.

1:32 prom night flashbacks 😢😢

6:34 gorgeous wisteria behind you, looks like your neighbors tree spilling over the fence.

"This thing exploded in my face and may have dangerous metals in it" "Yeah, I like these videos..."

Dans astonishment compilation cracked me up. I wasn't expecting it.

Great video! I had no idea that the color of the liquid indicated the temp range. I’m glad Dan wore eye protection because that flying glass could have been bad!

You know you’re early when the view count is under the FPS.

I dont know why but i keep watching this over and over and even weirder is i find this and the record one to be almost relaxing in a way

“It made a right popping sound” British 100

That Sir David Attenborough impression was pretty good 😄

i think filming a lasercutter would also give some nice footage.

I like how the slow-mo makes it look like Dan sat there and face-tanked a heavy stream of water for a full ten seconds before eventually deciding to slowly duck out of the way.

Came loving the frame rate. Left loving the opossum

How about a wasp injection knife into ballistic gel at 100,000 FPS.

Me * Takes a shot every time they say "torrent" or "ampule" * Also Me: * Dies of alcohol poisoning *

The “fan things” are fins and the entire part where the fins are is called the deflector. The bulb is called a “frangible bulb”. The part the bulb is holding in is called the “seat”. *EDIT* - see reply.

theres something about slow mo water with that ambient noise in the background that is just so calming

Glad you didn't test with real sprinkler systems. No one ever tells you that the water is black when it first comes out...

Next Video: How a hammock works while being eaten by an possum at 100,000fps - The Slow Mo Guys

I literally learned more in this one video then I did in my whole school career

You should do a slow motion video of Tar Pitch dripping at 100,000fps.

Even at low res for 100000fps it's still better res that 99% of youtube videos...

Idk why but when I saw this video in my notifications I thought they made a sprinkler spray out fire 😂😂

So the way that these are normally deployed , the pipes are dry and pressurized with air at around 45 psi (3 bar). This air pressure is holding a valve closed that is holding back water at about 120psi (8 or 9 bar). The ampule breaks, releases the air out. At around 20psi, the flapper valve flies open, and the system fills with water at street pressure. They spray a lot further when they go off.

It was funny when he said “little American temperature thingies

6:15 “it’s like an episode of Planet Earth, isn’t it?” 😂

Really cool video. As a fire sprinkler designer for residential properties this is of great interest. Off memory I sent you guys a message years ago that you should do this and I am glad you did. Highlighting the fire sprinkler industry is important and getting the word out that sprinklers save people's life's. Thank you Guys. Look forward to seeing more videos.

0:21 that frame by frame editing gav is amazing

Another great video. I didn't see in the comments that in a real sprinkler installation there's no water in the system. The whole system is filled with air under a low pressure. When one of the capsules is triggered a sudden drop in (air-)pressure is detected. This will open a valve in some small pressurised watertanks to fill the pumps and to start filling the tubes with water. At the same time these big pumps (driven by electric motors) are started. After just a few seconds the sprinkler will flood the area. The advantage of the dry system is, is that you can detect leaking seals without dripping water into someones keyboard or so (there will be air lost without the sudden drop). This also makes maintenance a lot less messy. Valves permits to isolate floors to locate the section with the leakage. With an ultrasound microphone you can then find the leak in the concerned area. Hope you found this interesting. Tada from me and looking forward to the next slow-mo.

I love the sound effects in slow mo lol. Sounds realistic every time

Can’t believe there is an actual camera called the Flex 4K flexing that it has 4K

*puts fire directly on sprinkler* "I didn't expect it to go so quickly"

6:19 . I did not expect that voiceover to be so spot on. The exasperated and tired tone was just on the pin.

I think Dan will be more scared of the sprinkler than the fire itself inside a burning building

The water was incredibly beautiful and had kind of an 'outer space' quality to it..in its slowest state.

Now I know how the sprinklers in _Die Hard_ went off.

I legit commented years ago to do this! So good to see it!!

"Hello guys, we're the slo mo guys and today...we're not actually dead"

Classic yard-bound Slow Mo Guys. This is the best stuff!

It's just a great, clever and amazing simple system, thank god for Fire Sprinklers!

6:18 I totally died 😂😂😂😂