Troubleshoot leaking Quick Mill Vetrano.
My Machine Is Leaking
If your Quick Mill Vetrano Design is leaking, there are a number of potential issues that could be causing it to occur. Our comprehensive guide below explains the multiple ways that your machine could be leaking.
1. Is coffee coming up and over the portafilter?
- Replace the group gasket using instructions found in the attachment at the end of this article.
2. Is the leak coming from the lever arm of the machine?
- There are 2 o rings in the lever of the machine. One or both of them may have blown out. You can take apart the lever, and check to see if they are worn. If they seem to be ok, you can lubricate them and see if that resolves the leak. If they are destroyed, they are also easy to replace and very cheap.
4. Is the leak or drip coming from the large pipe that comes from behind the group head? (The E61)
- There is one valve above the group head, and two below the group head. One of the two valves may be clogged.
- Try backflushing the machine. Please refer to this machine's "How to Backflush" article.
- If backflushing shows no improvement, try doing a group head teardown, and replace any valves or o rings in the valves, as needed.
How To Clean E61 Brew Group Mushroom, Jet and Top Valve
5. Is the leak coming from where the two pipes join in the E61?
- If leaking around the fitting or behind the fitting (where the two pipes join), either under pressure or sitting idle, may require tightening. You do not want to use sealant, as these pipes go into the back of the group head and would be in direct contact with consumable water/ coffee. This could also lock the pipes into the back of the group causing damage to the group which would require replacement of the group. Also contacts with metals is what makes the sealant harden, With how direct tightening is with those pipes you could end up cross threading into the group head thinking it's just the sealant getting hard.
- After tightening the leak still continues, Pipe may need to be replaced, or the fitting is cross threaded and the E61 group needs replacement. Under this circumstance, both parts may require replacement.
- The first is that one of the plumb lines connected to the back of the E-61 is not secure resulting in a leak. This will need to be tightened from the inside of the machine. You may see leaking from the bottom of the machine as well if this is the case. Remove the top of the machine and look towards the front of the machine. These lines will be located on the back of the faceplate, opposite to where the group head is seated. Use an open ended wrench or adjustable wrench to tighten these down.
- If they have recently done any group head maintenance on the machine, they may just not have tightened the nut down all the way. Try just turning the nut with a wrench and see if it moves.
6. Is the leak coming from around the nut where the steam or hot water wand attaches?
- If yes: There is a teflon ring in there. It is possible that the teflon ring was bad from the manufacturer. Inside the nut for the steam wand is a small channel that the teflon ring sits inside. You can undo the nut and inspect the teflon for damage or to see if it has moved from the channel in which it sits.
7. Is it dripping or leaking out of the tip of the steam wand?
- Yes. It should leak or drip a little bit after use, and when the machine is first started up. This is normal, and due to condensation in the pipe. It should subside after a few minutes of non use.
- If a leak like this is present, it may be due to either debris in the valve preventing the gasket to seal, or the gasket itself is worn out and no longer seals. Inside of the valve is a long shaft with a round rubber gasket inserted in the end of it. This rubber has either gotten hard with age and no longer seals properly, or the gasket has been over tightened too much and either is not sealing properly, or has shredded.
8. Is the leak coming from between the steam tip and the wand?
If the leak is between the wand and the steam tip, this is most likely due to the rubber o-ring around the steam tip.
10. Is the leak coming from where the stainless steel hose attaches to the machine?
- Check that your water line pressure is within a recommended range, which is about 30-35 PSI. If the water line pressure is really high, like 60 PSI, the extra pressure could cause a leak where the line attaches.
- Tighten all connections, which may require use of teflon tape.
11. Is the leak coming from the boiler itself?
- Is it leaking from where a valve screws into the boiler?
- The boiler must be replaced.
- Remove the valve, and clean any remnants of sealant. You can use teflon tape, Permabond, or locktite to reseal the valve back into the boiler.
- Is the leak coming from a weld point on the boiler?
12. I cannot find the source of the leak.
- Run the machine to allow it to heat. Some leaks may only be apparent under heat and pressure.
- You can open the machine and send us any photos or videos, so we can determine if we can find the source of the leak.
- Send the machine in for service.
13. Is the leak coming from the top nut on the group head?
- There is an o-ring that is loose, dirty, or worn out. Take out this mushroom valve, clean any scale or debris, and reseat the valve. All of these parts are separated by teflon rings. It could just be loose and slightly tightening could stop the leak, but with heat and age its possible the teflon is no good. Tightening the bit down more will only further deform the teflon allowing a leak to still continue, these should be replaced. If it is still leaking, replace the gasket that separates it from the top of the group head. To access these parts use an open ended wrench or adjustable wrench to remove the smaller top bolt of the E-61. This will give you access to the first o-ring and spring assembly. To access further down into this part of the group head use a wrench to remove the large bolt. This will let you access the other o-ring, another spring assembly, and the valve assembly. Inspect all of these components for integrity. Clean any dirty parts and replace any broken parts. Reassemble the group head and see if the leaking is resolved.
- If you’ve recently serviced the group head, It’s possible the nut is just loose. Try tightening it.