Question about Saeco Starbucks Sirena Espresso Machine

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My SERINA leaks WATER . IT only leaks water when the POWER IS ON. PLEASE NOTE: The water is coming from the cavity of the machine, not from between the tank and the machine. 3 Weeks ago I contacted a SAECO tech rep and she sounded quite sure that the black cupped washer that sits under the round plastic housing (on the machine) where the nipple on the tank enters the base of the machine. I purchased two washers, one for a spare, and she shipped them to me here in Mexico. I installed the washer and reinstalled the washer and the machine still leaks when it is turned on. i'm hoping your expertise will help me solve the problem, properly. Cheers, Collin

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  • collinmex Dec 12, 2009

    I removed the new lip seal (32) and the existing 'O' ring (18). I cleaned the O ring and replaced it. I replaced the lip seal with another new one (Saeco shipped me two). The leaking has either stopped or is reduced to a very, very slow dribble.

    Please tell me, is it possible that the #22 'O' ring would also contribute to the leak?

    Please tell where I would order new seals for the Sirena if I need them.

    Thanks for your assistance.

  • collinmex Dec 13, 2009

    I have allowed the Serina to be tested to see if the leak has stopped. As of this morning the problem still exists. The machine is STILL leaking.

    Could the problem originate from within the machine and not the tank-to-machine connection?

    Please advise.



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I hate it when my espresso machine leaks. Ruins the whole day!

The link below is a parts diagram of the Starbucks Sirena machine.
Could you locate the washer you have already replace. I just want to make sure we are talking about the same washer. I'm looking at #32, "Lip Seal".
Also if you don't have a diagram check it against what you removed and replaced. Do you remember #18, "O-ring". If you did not inspect this closely you may have missed cracks in this O-ring seal.
It may be something besides the washer or it could be that the washer wasn't seated properly.
Let me know what you remember.

Posted on Dec 12, 2009

  • david mcclellan
    david mcclellan Dec 14, 2009

    The link below should be able to supply the the parts you might need. As long as they are available as a replacement part. However "O-Rings are not really designed to fit a particular product. Most things that call for an "O-Ring" are designed around an existing size available. You can get them at just about any hardware store. The seals are a different matter. Again check the link for those.

    It is interesting that after you installed the seal the leak was reduced. This could mean a couple things. It could be that you overtightened the O-Ring and seal. They really don't need to be tight to make a good seal. Also you may have cleaned the O-Ring to much. A dry O-Ring is almost as bad as a cracked one. Use a little Vaseline on the O-Ring and reinstall it.

    If this doesn't work it could be the other problem which is one of the surfaces that seal up against the seal or O-Ring is compromised some how. This could be from a warp or crack it the surface. In which case it's not ever going to seal properly until the surface in question has been replaced.

    It's hard to say whether #22 O-Ring could contribute to your leak. But to be honest for what O-rings cost you might as well replace it. It certainly can't hurt.

    I have researched your problem and didn't find anything that mentioned any ongoing issues like yours. But you might want to inquire from saecoparts and see if they know of anything other then what you have already tried.
    I also posted a question in a forum but I haven't seen any reply on it yet.

    Please let me know what happens if and after you try anything here.
    I will post anything I find in the mean time.



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