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Thread: Water from brewing tap contains coffee granules!

  1. #1
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    Water from brewing tap contains coffee granules!

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I wouldnt say i am an expert but i have had some past experience with making coffee and having owned a number of machines i thought i would be able to answer this simple question. Um...so here is my dilemma...i have recently purchased a new domobar super lever machine (my stepping stone to a GS3) and after having it for about 2 weeks have noticed that there are coffee granules floating about in the water that is dispensed by the hot water tap. Other than this minor problem or annoyance, the pre-infusion feature is great and the shots that i have been able to pull with this little machine and my mini mazzers have been great. I am open to all advice and any ones two cents worth, a little knowledge is better than none at all. If there is anything that could help me with could you please let me know. *Regards Jarryd

  2. #2
    Senior Member Stan's Avatar
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    Re: Water from brewing tap contains coffee granule

    Try cleaning the end of the tap. I dont know how but I ended up with ground coffee on the end of the water dispenser on my machine and I was getting the same problem. If however you think the coffee grounds are coming from inside the machine then I think you have a problem.

  3. #3
    Senior Member Koffee_Kosmo's Avatar
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    Re: Water from brewing tap contains coffee granule

    I think it is overdosing
    When you switch off the brew process it creates a vacuum and sucks a little of the brown water up
    Most goes out to the overflow some grounds must remain at a junction point and when you turn the water on it flushes them down and out

    It could be something as simple as that

    Well thatís my theory :)

    KK

  4. #4
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    Re: Water from brewing tap contains coffee granule

    Thanks for that, so you recommend that i just flush my hot water tap for a while and those grinds would no longer be there?:S. One quick question, if the water with the granules was coming from inside the machine i.e. the boiler, how much of a problem would that be?

  5. #5
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    Re: Water from brewing tap contains coffee granule

    I cant see how that could be physically possible to get coffee grinds inside the boiler of an HX machine. The brew path is completely separate from the boiler! Just flush it clean and see if the problem persists. Could it be some particles of water scale or something? Are you sure its coffee granules?

  6. #6
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    Re: Water from brewing tap contains coffee granule

    Well that is reassuring but they are definitely coffee granules. I flushed and cleaned my machine yesterday and they are still there. Um...the machine is brand new so i dont see why this should happen. If there is any advice you could offer please let me know, i have tried all advice given but problem persists.

  7. #7
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    Re: Water from brewing tap contains coffee granule

    Not wishing to argue but there is no possible way for coffee granules to be coming from the hot water spout.....as someone already mentioned it is a totally different circuit to the coffee brew circuit.

    The presence of small black particles coming from a hot water spout is not uncommon and shouldnt be anything to be alarmed about. It is most probably some swarf left over from the manufacturing process.

    Regardz,
    Attilio.

  8. #8
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    Re: Water from brewing tap contains coffee granule

    There is a possible path albeit unlikely and would require special conditions. The instant the pump turns off after the brewing cycle and just before the triple valve opens the drain, the brew pressure (~9bar) backs up into the HX. If it were not for the check valve (one way valve) next to the boiler/HX junction, a little brew water may well find its way into the boiler. This would be particularly so if you began drawing hot water at the same time with the pump having just stopped after the brew but not yet triggered by the drop in boiler water. Thatís the theory anyway, based on pure logic and no experience whatsoever.

    As suggested by the others, the first thing to do is to be absolutely sure that what you are seeing are coffee grinds. If they are, I would suspect the check valve and examine.

  9. #9
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    Re: Water from brewing tap contains coffee granule

    Thanks everyone maybe you are all right. Um...they could possibly not be coffee granules, i wonder if maybe a picture of the water in a white cup would help? Let me know thanks

  10. #10
    Senior Member Stan's Avatar
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    Re: Water from brewing tap contains coffee granule

    Try examining the particles under a magnifying glass or microscope and try and identify them. May help to identify where they are coming from.

  11. #11
    Mal Dimal's Avatar
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    Re: Water from brewing tap contains coffee granule

    Maybe try tasting em? Worst it can be is a bit of oxide flaking off from the inside of the boiler after the various brazing jobs were completed.... ;)

    Mal.

  12. #12
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    Re: Water from brewing tap contains coffee granule

    If you have only had it for two weeks, take it back and ask them to work out what it is.

  13. #13
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    Re: Water from brewing tap contains coffee granule

    Yeah it looks like it could be something other than coffee, if it is a bit of oxide flaking from the boiler, how long will this problem persist?

  14. #14
    Senior Member Koffee_Kosmo's Avatar
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    Re: Water from brewing tap contains coffee granule

    You can just flush it out via the water tap
    A few boiler fills will probably do it

    If the particles are large you will also need to clean the screen on the tap (if one is fitted)

    KK

  15. #15
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    Re: Water from brewing tap contains coffee granule

    When you say flushes you mean to flush an entire water tank though the hot water tap, correct?

  16. #16
    Sleep is overrated Thundergod's Avatar
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    Re: Water from brewing tap contains coffee granule

    Behmor Brazen - $249 - Free Freight
    Yes.
    A few times to see if that fixes the problem.



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