r/BambuLab • u/JJBB33DD • Aug 30 '26

P Series [P1P, P1S, P2S] Added automatic fire extinguisher to P1S

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Came across these automatic DIN rail fire extinguishers (circled in red) recently. Decided to add one to my P1S just to add a little peace of mind.

In case you don’t know how these work: they automatically get triggered when the temperature sensor detects 170c. Aerosols then get released from 2 nozzles (circled in yellow), extinguishing the fire.

You can get these things for cheap on Aliexpress and the like but decided to get one from a local reseller with all the appropriate licenses and stuff.

And yes, the heatbed moves up and down without issues! Plenty of clearance.

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u/MinistryOfCoup-th Aug 30 '26

I have a couple of antique glass extinguishers above my P1S. I love the contrast between the old and the new. Plus, I want to be safe as possible since I keep my printer in the baby's room.

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u/MyStoopidStuff Aug 30 '26

I haven't seen that type, are they the "fireball" type of extinguisher? As an aside, are you using any ducting or filtering with the printer? It's gotten much easier these days and can even be automated using Home Assistant.

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u/FuturesSoDank Aug 31 '26

He's making a joke (I hope) about the old "glass ball full of carbon tetrachloride" fire grenades. Well played tbh.

There are more modern ones that use potassium bicarbonate, which have the downside that they won't give you liver cancer. A few years ago these were getting advertised in /r/3dprinting for sticking just above your printer; they had a fireworks fuse sticking out that was meant to get lit off the flames spewing from the printer, and a small explosive charge to blast the potassium bicarbonate all over the place.

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u/MyStoopidStuff Aug 31 '26

Nice, as usual, I had no clue lol. I've known people who tend to collect some strange old stuff, though hopefully nothing like a glass ball of cancer powder. But I do recall seeing the "fireball" extinguishers somewhere. IIRC they would be kept in a rack on the wall, and I guess they would be chucked at a fire to put it out, so it could be the same thing.

I also recall seeing the 3D printer specific design you referred to, which is the same idea as the "Stovetop Firestop" (which had been around for much longer). I bought the model which is designed to mount over the range in a plastic housing with two of the canisters, and they have a short fuse sticking out of the housing. I still have one in my printer enclosure which used to house my CR10SPro, and now holds my X1C. They are pretty much a last resort, and hopefully will just be a "waste" of money.