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Thread: Mypressi - a litany of problems and finally, the end

  1. #1
    jur
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    Mypressi - a litany of problems and finally, the end

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I have been using a Mypressi V2 for more than a year and initially, things went swimmingly. But as the machine aged, more and more problems crept in. Today my love affair with this POS finally came to an end. So here is the list of things that have gone wrong with mine.

    1. The trigger would get stuck, requiring a fiddling around to get it back out. I later learned that a sticky trigger was a known issue.

    2. The O-ring at the gas bomb neck would tend to extrude from its gland, leading to catastrophic leaking of all the gas at once. To fix this I started using silicone grease, providing lubrication to the O-ring when inserting the bomb. But almost every time I forgot to grease the bomb neck, it would happen again. I haven't checked the manual recently but I don't recall instructions to use silicone.

    3. The gas flow would be slow and occasionally non-existent on pressing the trigger. I later learned this is a known problem.

    4. Somehow, the bayonet fittings that close off the water bowl lid and bottom loosened up; I didn't see any signs of metal wear at all, since the original plating is intact, so it seems that the metal just gave way, presumably from the pressure on those fittings when pulling that gas trigger. This had the result that the various O-rings that provide seals started leaking, even on replacing them with brand new ones. The metal is copper, I understand.

    5. The plastic unit which houses the shower screen developed a tiny hairline crack, allowing water and pressure to leak past the brew basket, leading to weak extractions. It took me a long time and many efforts to find this culprit. Luckily there was a spare included in the box, meant for a pod, but I pressed it into service.

    6. The bayonet fittings giving way had the result that the gaps where the various O-rings seal off, have increased. Not only did they tend to leak, but the small O-ring would be extruded from its gland and be blown out altogether, giving me quite the scare. This happened numerous times before I realised what was going on. More often than not the small ring would land in the sink without me spotting it there, leading to it being flushed away. At first I assumed that the small O-ring had fallen out even though I look directly at the O-ring when I fit the bowl, but as it happened again and again, once 3 times in a row, I had the sudden insight that the O-ring was being extruded from its gland. So I got some water-approved putty and patched things enough to prevent it from happening again.

    7. I ordered a new trigger unit, but that was $60 down the toilet. The new trigger unit is supposed to solve all the known problems but it created a few of its own. After waiting what I thought to be an excessive amount of time to get my refurbished unit back (others might not agree), the new trigger sure delivered pressure all right. Too much pressure, in fact. It seems to me that the low gas flow of the earlier trigger covered up other problems, and now with gas flow at full pressure, numerous other things started going wrong. And I still had a sticky trigger.

    8. So the increased pressure would blow the small O-ring out of its gland almost every time until I fixed it with the putty. It also tends to leak somewhere near the trigger itself on occasion, when pulling the trigger, leading to total gas loss. I managed to baby it a few more times without misbehaving by operating the trigger very carefully.

    9. Today I had the last straw. Today as I pulled the trigger there was a deafening explosion, my wife dropped a cup she was busy with, and my ears are still aching. I found the O-ring between the lid and bowl had extruded this time. That is one of those places where it developed gas leaks over time, and now with the powerful pressure and metal bayonet fittings that have given way, the increased gap is simply also too large, allowing the O-ring to extrude. The large amount of gas in the water bowl above the water finding a large gap to escape through is what caused the explosion. The escaping gas from the explosion blew directly over me and it's a miracle I didn't drop the unit. I pushed the O-ring back into its gland and managed to baby the last espresso from the now-defunct Mypressi.

    I guess that is the end of this machine. It clearly was not designed to last very long at all. I am fully inclined to put the entire thing in the bin but perhaps there is someone on this board who wants it for spare parts? Worn spare parts, that is. Just pay postage or pick it up. PM me if interested.

    The only other thing I can think of is that the gas bombs I use ( a well-known brand sourced locally) have too much pressure. But I have been using them from the start and initially there were zero problems aside from the trigger issues.

  2. #2
    Senior Member Yelta's Avatar
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    Bad luck Jur, have to give you 10 out of 10 for perseverance, I would have given up long ago.

  3. #3
    jur
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    I have to add something on the credit side:

    This device makes simply brilliant espresso. I think for occasional use it is very good. It is not for nothing that I really liked the device.

    But the trigger mechanism needs attention, it seems to allow through too much pressure which seems beyond the design limits. That is my guess as to why quite a number of things went wrong - all can be traced back to excessive pressure. To give an idea of the intense pressure, my brew basket started out life with a flat bottom, it is now distinctly bulged out.

  4. #4
    jur
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    Well I managed to fix my unit.

    I had bought a ROK/Presso unit to move on, but the Mypressi sitting in a box was like a splinter in my mind. I just couldn't leave it sitting there.

    I had emailed Steve O'Brien about the problems and although he seemed courteous enough, no real help seemed forthcoming. He said he was waiting for spares to come in and he would contact me when that happened but after 6 more weeks there was still no news. It really does seem that the company has severe problems. I am guessing there is a cash flow problem, leaving him unable to order spares even if he is willing. Such a shame really, as the Mypressi machine produces top notch espresso.

    Anyway, after nothing further happened, I decided to completely strip the regulator unit to see if I could get it going again. My first effort was concentrated on cleaning and greasing, but testing it produced no results other than that the pressure regulator was still not actually working. It would allow gas at full pressure through, with the result that the pressure relief valve would vent all the gas.

    OK, so I stripped it fully again, figured out how it works and reached the conclusion that 2 O-rings in the main pressure regulator were simply too small to allow it to work. Gas would simply escape past the O-rings. So I got my el-cheapo Aldi kit of O-rings out and replaced just those 2 O-rings and now it is back to working again!

    I can't see how it even worked in the first place with those dodgy O-rings. I can only guess that they were too small but initially managed to regulate the pressure, just. It just worked for a week.

    I am left wondering what I actually got for my $60. The trigger unit looks like the same one, the metal looks old tarnished and used. I was under the impression from the website blurb that a new trigger unit ie gas regulator would be installed. That does not seem to have been what happened based on the aged look. Not only that, but the thing was dirty inside, putting doubt on Steve O'Brien's claim that it would have been cleaned.

    So I can only guess that after my complaints about waiting rather long for my "refurbished" unit to be returned to me, there were no actual spares available (the reason for the delay) and that it got sent back either as-is or with a few new O-rings installed. Either way, it was a disaster waiting to happen as my repeated O-ring failures attested.

    So while I am again using the unit, I advise anyone who are considering to buy one of these, to use caution, as the company seems completely unable to provide the needed support, my guess is due to cash flow problems. You may end up with an expensive paperweight as not everyone might have the necessary engineering know-how to fix it.

  5. #5
    jur
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    Hmmm. Wrote too soon.

    While the pressure is now regulated, I found it is still leaking gas somewhere. It gets cold when pressing the trigger, so gas is escaping somewhere it should not. The gas bomb emties in a little while by itself.

    Back to the workbench.

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    Quote Originally Posted by jur View Post
    Hmmm. Wrote too soon.

    While the pressure is now regulated, I found it is still leaking gas somewhere. It gets cold when pressing the trigger, so gas is escaping somewhere it should not. The gas bomb emties in a little while by itself.

    Back to the workbench.
    Hi Jur - I've just had the same problem with my device - the gas appears to be escaping from the handle area close to the neck. Di d you happen to resolve your problem at all?

    Cheers
    Damien

  7. #7
    Senior Member summercrema's Avatar
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    I have three units of Mypressi two of them not working already (one is gas leaking, button will not release, where did you guys take it to get them them repaired?
    Last edited by summercrema; 22nd October 2013 at 10:03 AM.

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    I believe they are stopping making them or supporting them. "They" being the supplier. Speak to James at Real Coffee at Lorn, NSW, Commercial link removed per site policy. He knows the full story. I'm not the best with exact detail
    Last edited by Javaphile; 22nd October 2013 at 04:29 PM. Reason: Commercial link removed

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    I contacted Mypressi to order one online..after a few emails back and forth Steve offered to bring me one over on his trip to Australia and post it to me from Sydney where his conference was. I tried contacting him after agreeing to this and I just got no reply from that point onwards..I agree with Jur, I think that they may be having some problems within the business..it's just a shame because i really wanted to try out this little contraption to see what all the hype is about!

  10. #10
    jur
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    Quote Originally Posted by Damien View Post
    Hi Jur - I've just had the same problem with my device - the gas appears to be escaping from the handle area close to the neck. Di d you happen to resolve your problem at all?

    Cheers
    Damien
    Gas escaping from the neck area is most likely the pressure regulator not working properly, so the gas eacapes from the excess pressure relief valve. Or it is due to worn O-rings in the main gas path.

    From my analysis of the trigger unit, there isn't anything that can wear except the various O-rings, so replacing these could fix the problems.

  11. #11
    jur
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    Quote Originally Posted by summercrema View Post
    I have three units of Mypressi two of them not working already (one is gas leaking, button will not release, where did you guys take it to get them them repaired?
    I originally sent mine back to Steve O'Brien in Sydney but that resulted in the frustratingly long wait with finally no result. I also was never refunded despite promises about them honouring the website's stated guarantee.

    I asked a WA dealer about the reliabilty of these units and the honest response was there were a lot of returns. All due to the trigger unit's various problems. My advice is to open the units up amd mix amd match to see if you can get one working unit. It helps to lubricate with silicone grease. Or write them off and move on.

  12. #12
    jur
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    Quote Originally Posted by Andrew1992 View Post
    I contacted Mypressi to order one online..after a few emails back and forth Steve offered to bring me one over on his trip to Australia and post it to me from Sydney where his conference was. I tried contacting him after agreeing to this and I just got no reply from that point onwards..I agree with Jur, I think that they may be having some problems within the business..it's just a shame because i really wanted to try out this little contraption to see what all the hype is about!
    I intend to have another go at mine today by replacing some more O-rings, because the fact is it produces matchless espresso. However I advise against blowing money on this, not reliable and no more support. Such a pity. It needs a backer.

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    Weirdly my secondhand Mypressi is still working flawlessly. I only use it when I'm camping or away from mains power, and it's become naked after being dropped, and has a piece of packing tape holding the handle together.

    Question is: when it does die - which it will eventually - what's the best replacement in 2019? The portaspresso looks good, but maybe a bit heavy?

  14. #14
    Senior Member Yelta's Avatar
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    I've found the Flair to be a pretty good device, probably worth a look.
    https://www.jetblackespresso.com.au/...espresso-maker
    Dimal and Kjarsheim like this.

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    +1 on the Flair. If you stay away from all the shiny finishes and bells and whistles they're coming up with, you have an extremely good value, capable, well built and durable manual lever espresso device (which I have been joyfully using since Sept '18 while working FIFO).
    If you like the shiny and other stuff, more power to you, but I'd be inclined to check out the Cafelat Robot Barista version as well.
    Dimal likes this.

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    If your primary use is camping the Flair wins hands down for compactness. It has also been well received by very experienced CSrs for its general effectiveness.

    As Kjarsheim says, if you stay with the base model it is an extremely cost-effective espresso lever machine. The base model is available at around $200 but, by comparison, the latest Pro model has just hit the streets locally at around $500.

    If you were tempted by the Cafelat Robot there is one currently on offer by Melbroaster at a good price.

    I've used both and would recommend both. They are equally capable and the main distinction would be the price advantage for the base model Flair. However, the Flair Pro model and the Robot are a closer match on price.

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    Behmor Brazen - $249 - Free Freight
    Another option would be the ROK Presso with the new GC conversion. This modification replaces the original plastic cylinder and piston with glass composite materials. The piston diameter has also been reduced which delivers a higher pressure.

    I had an original ROK but replaced it after ongoing concern about the plastic parts which would creak disconcertingly during an extraction. I never actually broke any parts though and this conversion would address the misgivings I had about it.

    mjoyce has a ROK with the GC conversion on offer at the moment at an attractive price. If I hadn't settled on the Robot I'd probably be tempted by this offer to revisit the ROK.



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