Sostituzione tubo dell'aria del gasatore SodaStream Source

What? No; the symptoms of a ruptured/disconnected hose (the topic of this repair) guide are totally different (i.e. the total opposite) than the symptoms of a clog or restriction (the topic of the YouTube video). Presumably everyone here is here because they have the symptoms of a ruptured/disconnected hose.

Same thing happened to mine. Not even attempting epoxy, as I don’t know anything that would work and seal it due to the compression fitting design. I would simply replace it with what looks like the “update” one with metal tube nuts. The compression fitting is a very small metric one as a 3mm hose and M10x1.0 threads for the nuts

So to reiterate, what’s the P/N for this hose? A replacement guide is useless without being able to get that part.

Has anyone managed to source a replacement nut for the plastic ones mentioned by Tim Spencer above? With a hole for a 3mm hose and M10x1.0 threads? I’m in Toronto Canada and have 2 Sodastream Crystal models with a broken plastic nut! Thanks!

(sorry for posting this twice, but just joined and now realised I can reply directly to a specific post)

I bought a replacement part from Esty. Just search ‘SodaStream Nut Replacement’ and you will find multiple sellers. Cannot post the link as it’ll be detected as spam.

People! You really shouldn't rely on 3D-printed threads to secure 145 psi; eventually someone is going to get hurt. And you especially shouldn't rely on 3D-printed threads if you're going to employ the slotted-nut trick to avoid buying a new ferrule; if you're going that route it's insane not to start with a proper metallic one.

To that end, the most recent comments here inspired me to place a new order from the place in the UK that stocks these (see links shared in my previous posts). Thankfully their new website has more reasonable international shipping options (previously it was like $30 to ship a £0.73 part to the USA), so I will soon have ten more nuts and ferrules to sell on to anyone in the USA who needs one (or a complete hose assembly).

Also note that the threads are not M10, they're 3/8”-28, i.e. BSP. So if you're going to ignore my advice and 3D print one, at least make sure you're printing the correct threads!

Would I need a full hose assembly just to replace the broken plastic nut? Or could I reuse the hose just cutting off the old ferrule and adding the new compression nut (if we were actually to find one)? Not sure how much difference it makes but I've got a sodastream Crystal. I don't really know much about the standards but I've found that a 1/8” FIP thread fits on smoothly to the receiving plastic part the hose connects to. Unfortunately, no luck finding a compression nut with that kind of mouth and an 1/8” OD tube. I'm definitely interested if you've found something to work!

Full hose assy vs. just replacing the nut is an open question; I went ahead and ordered two nuts (and I have what I believe to be suitable tubing on hand), but I may try just replacing the nut first. However, this necessitates shortening the existing tube slightly (i.e. cutting off the part with the existing ferrule stuck on it), and I’m afraid it may end up flexing the tube too much and rupturing the tube. (I don’t know the differences between SodaStream models, but if yours doesn’t require the tube to flex every time the machine is used, you may have more flexibility (no pun intended) to just replace the nut.

Be careful with the FIP—if I understand, that’s the female variant of what I’d call NPT and is a tapered thread. So it may appear to fit smoothly for a couple of revolutions and then start chewing up your plastic threads! (I held up a male 3/8”-27 pipe thread fitting side by side with the SodaStream part and their threads did NOT line up perfectly, with SodaStream being slightly finer, i.e. 28 tpi.)

Nice ! I wondered the same about shortening the hose but it seemed to have enough length — we’ll see, you may be right though. I had a female to female 1/8 FIP (NPT) and it screwed on seemingly very smoothly to the sodastream — hope I haven’t inadvertently damaged it, though there was absolutely no resistance so seems ok. Unfortunately, that F-F adapter would force me to use some male adapter with a compression fitting on the end of it and that’s just too long for the tight space in the sodastream. Let me know if things work out for you once your nuts arrive. Out of curiosity, where did you order them and where are you located? Thanks for your insights thus far!

Nuts finally arrived, but I was skeptical of the included ferrules, so I tried to re-use the existing one—hose blew out right away, as feared. But I knew there was no way I could tighten the nut down hard enough to sufficiently deform the new ferrules without destroying the machine’s plastic threads, so I first tightened the new nut and ferrule into another fitting, then backed it off and tightened it onto the SodaStream, just tight enough to seal the already-deformed ferrule. This is all with the original hose cut short, by the way—we’ll see if it lasts.

I’m in Seattle. I ordered the parts from asap-supplies.com; what you really need is one of their part 303931 and one of their 303841, but the former was out of stock when I ordered, so I just ordered one of 303500, since it comes with two nuts and two ferrules. But the ferrules it comes with are different (303831) requiring the aforementioned ‘hack’ of using the double-male fitting (which I was going to throw out) as a tool to pre-deform the ferrule.

What I should have said last night is that—assuming my slightly-shortened hose doesn’t fatigue and fail within the next couple of days—I’d be willing to sell the extra nut and ferrule that I have, and the fitting they came with (which needs to be used as a tool to pre-deform the weird chunky ferrule prior to installation on the SodaStream’s plastic fitting).

I also found this: https://www.alliedelec.com/product/rs-pr... But by the time they responded to my inquiry to confirm the correct female threads inside the nut, I’d already ordered the aforementioned parts from the place in the UK. And I don’t know how suitable the included ferrule on this one might be.

So I just read your previous posts where it looks like you are re-use the old hose. What about the ferrules? Do they cone with just the nut or do you they come with that male to male tool as you called it? I devised my solution before I saw your link to the nut/fitting. That may have swayed me but I like where my approach uses a new hose ($.22) and metal fittings that can crimp it properly. The larger brass fitting don’t seem to get in the way and the hose can be a long as it needs to be.

In my case (the lone nut linked in the above post was out of stock), when I bought the male-to-male fitting (which fortuitously became the swaging tool) that came with two nuts, it also came with two ferrules, so that was all I needed. Now that the lone nut is back in stock at that website, I’d recommend buying a more conventional ‘olive’-style ferrule, and maybe it won’t need to be pre-deformed against a metal fitting prior to assembly.

And yeah, I was sort of torn between re-using the hose (shortened ~6 mm) and making a new one with tubing I had on hand. I decided to try the former first because I didn’t have specs on my tubing; looking more closely at my tubing, I’m pretty sure it’s this: https://www.festo.com/us/en/a/567945/?q=... —food-safe pneumatic tubing with a 145 psi pressure rating and 0.25” minimum bend radius—given that the product I bought included two nuts and ferrules, I probably should have just made a new hose!

Hi! I wanna echo Joe Elliott’s comment on the replacement parts. I’m from Taiwan and have been looking for the right part to replace the broken plastic air hose. The local Sodatream distributor asks for US$80 to replace the whole block and won’t simply offer the replacement nuts. I went ahead and ordered from asap-supplies.com the part ”303535” (combo) and 303841+303931 as backup. The Jet is fixed and been working well. Many thanks to Joe for the helpful tips!

How did you secure the tube to the ferrule?

Well that’s not quite what I expected—what purpose does the intermediate fitting serve? Would the tube nut not thread directly onto your G100? (I was thinking you’d just use the tube nut and included ferrules, and discard the extra fitting—at least that was the intent with my second [untested] suggestion above.) Is there any kind of sealing surface inside the female end of that extra fitting, or are you just relying on the threads to seal the gas there (which, if it’s the same as the SodaStream Source, they’re not intended to do)?

Nice solution, how did you secure the tube to the ferrule?

BTW Joe, I suspect that the extra intermediate fitting you mention might provide the additional length that was lost cutting the tube so it might be a blessing in disguise?

Probably should have asked “how did you secure the ferrule to the tube?” not “the tube to the ferrule?” technicality but…

The ferrule is designed such that it gets crimped securely to the tube by virtue of tightening the tube nut over it. But because the mating fitting on the SodaStream machines I’ve repaired is plastic, I was a little concerned that tightening the nut down tight enough to properly secure the ferrule might damage the machine’s plastic fitting; so, out of an abundance of caution I slipped the nut and ferrule over the machine’s tube, and tightened it down onto another (metal) male fitting temporarily, to secure the ferrule, before actually reattaching it to the plastic male fitting in the SodaStream. But, depending on the style of ferrule you’re using, that might be unnecessary overkill (e.g. the style of ferrule used originally by the SodaStream factory obviously crimps to the tube just fine when torqued against the plastic fittings, without damaging anything).

See my second post of Jan 29 above for a USA source. (Unfortunately I’ve already sold the extra nut I imported from the UK.)

Read the comments above; I posted links to two different sources for the nut, and someone else posted a link to a complete tube + nuts assembly available on eBay. Also: Please DON’T 3D-PRINT A TUBE NUT THAT’S GOING TO BE SUBJECTED TO REPEATED PRESSURE CYCLING or suggest to others on the internet that it’s a safe/reasonable thing to do.

Thanks, I am going to print one of those.

Same threads as the metal version; 3/8”-28 BSP. Buy one of the off-the-shelf metallic tube nuts that I linked above.

Heh; cutting a slot in the nut to allow replacement with the original ferrule in place is pretty clever. But if you own a file and are capable of cutting your own slot, the part that I use to repair these is still a lot less expensive: https://www.asap-supplies.com/products/b...

https://www.asap-supplies.com/products/b... + https://www.asap-supplies.com/products/a...