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Isomac mondiale drip

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  • Isomac mondiale drip

    Ive got a isomac mondiale with a plumb in kit. It has developed a constant drip from the tube that normally returns water to the water tank, this wouldn't be a problem if it wasn't plumbed in, but now it can overflow the tank.

    It has always had water coming out of it when the machine was running but not when the machine is just sitting there.

    If you look at the opv pic in this link

    Its not the tube coming from the opv, but the tube on the right that comes from the point just after the water inlet from the pump.

    Any ideas of causes and solutions?


  • #2
    would be helpful if i knew what this valve does, its no# 45, part no 000569 just marked "valve" on the mondiale diagram. Interestingly my pump pressure stays high after pulling a shot. I can realese the pressure with the e61 lever, if i release all the pressure the valve drips, if i keep the pressure above 3.5 bar no drip.


    • #3
      Looks like an expansion valve. This should drip. The other valve should be your OPV/bypass. Either way, one will be adjustable to increase/decrease pressure at group head if you have a reciprocating pump.