Vesuvius miraculous water tank

AJuar

I don’t know if this is the correct place, but I would like to share my Vesuvius problem with you because I am set on finding the solution. I enclose the video. When I leave the machine on for 30 minutes, the water level of the tank goes up. I have checked this by making a mark with a felt pen in the tank. I have also checked that taking out the short tube nothing goes out that way. Therefore, it must go out through the long tube, around 100 to 200 ml, depending on the day.
When I pull the lever, no water at all comes out of the group. And then the pump takes a few seconds at maximum power to refill the coffee boiler which is partially empty, or at least the circuits are. And just when the water tank level reaches my mark, the group starts pouring water.
You can see all of this in the enclosed video. Besides, I know two other people who have the exact same problem.
Any suggestions?

DavecUK

AJuar The one way valve is leaking back from the brew boiler into the inlet tube. Trace where the pump outlet tube goes and just beyond that fitting is the 1 way valve. Open clean, replace any O ring if perished.

How old is the machine, what sort of water do you use?

Fix ASAP otherwise you will risk popping your brew boiler element,

MediumRoastSteam

Is the water in the tank hot, i,e, is it escaping from the boiler under pressure? I’m baffled!

AJuar

Thank’s, I will do it this week, no me but a technician.

The machine is 3 years-old, but this happens since it was two years old. I use osmose water with/without bicarbonate or mineral water with very low ppm. If I repair the o ring and clean the one way, do you think that it will work two more years and It will fail again or it is posible that it will work longer? If I use the correct water, why does it happen in only two years, it’s normal? And, I know almost 3 persons with the machine with the same problem, do you know anybody in the same case?

In any case thanks for your help I will let you know

DavecUK

AJuar Mine worked 5 or 6 years and has never had that problem, I use RO water with Bicarbonate.

I have heard of one machine that never had an O ring fitted in the valve, that was easily solved.

The one way valve problem is common in many machines (not just vesuvius), especially rotary/gear pump ones as vibration pump machines also have the vibration pump acting as a second valve. The problem is almost always caused by poor water quality, but sometimes particles of something in the valve (e.g. if filter cartridges are used, I never use them).

The Vesuvius uses a commercial water distributor, so it’s not a quality problem. If fixed, the machines should last many years, 6, 10, longer without a problem, as long as good water is always used.

P.S. The problem may have been cause by the times you used mineral water, especially if water has other things in it that can gum up or desposit on the valve.