Results 1 to 9 of 9
Like Tree1Likes
  • 1 Post By Jackster

Thread: Over pressure valve leaking? Diadema Junior Plus

  1. #1
    Junior Member
    Join Date
    Feb 2007
    Posts
    18

    Over pressure valve leaking? Diadema Junior Plus

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Sisters old machine leaking badly, as soon as you turn it on water gushes out the bottom cut outs of the big brass valve with the chrome ring. The sprung Piston moves freely but looks like it isn't seating properly. Water bubbles up from the white valve with the pressure sensor too so I'm guessing it's related.

    I'm hoping it's just something stuck in the valve that I can wiggle out. Anyone have this happen to them?
    Attached Images Attached Images

  2. #2
    Senior Member Jackster's Avatar
    Join Date
    Nov 2017
    Location
    Maddington, Perth. Wa
    Posts
    864
    That boiler isn't meant to be that full. You have a issue with the fill sensor.
    I think it's the grey or the green wires. One might be for the low water level sensor and the other for the fill cut off...
    If you have had it apart, you might have connected the wrong wires.

    Careful with messing with these, they maybe the element wires, I don't think they are, but check with a sparky before messing with them.
    Dimal likes this.

  3. #3
    Junior Member
    Join Date
    Feb 2007
    Posts
    18
    Quote Originally Posted by Jackster View Post
    That boiler isn't meant to be that full. You have a issue with the fill sensor.
    I think it's the grey or the green wires. One might be for the low water level sensor and the other for the fill cut off...
    If you have had it apart, you might have connected the wrong wires.

    Careful with messing with these, they maybe the element wires, I don't think they are, but check with a sparky before messing with them.
    Thanks Jackster, was supposed to have been recently serviced. Was working fine up till today, will have a bit more of a look for anything obvious

  4. #4
    Junior Member
    Join Date
    Feb 2007
    Posts
    18
    Quick update, drained the boiler and it filled no problem with no overflow but as soon as it came to the boil it started bubbling out of the smaller valve. Big brass one doesn't leak anymore?

    At $30 I'm happy to try changing the water level sensor but it looks like there is two or is one the thermostat?
    Attached Images Attached Images

  5. #5
    Senior Member Jackster's Avatar
    Join Date
    Nov 2017
    Location
    Maddington, Perth. Wa
    Posts
    864
    The one you have circled with orange is your antivac valve.
    It should hiss a little till it boils, then shut off and build boiler pressure. Coffeeparts will have new ones.
    Or take it off, pull it apart and descaled/clean it.

    It has same antivac as my simonelli, so fairly generic.

  6. #6
    Senior Member Jackster's Avatar
    Join Date
    Nov 2017
    Location
    Maddington, Perth. Wa
    Posts
    864
    https://www.coffeeparts.com.au/parts...-vacuum-valves

    I previously encouraged others to get the valve with the barb/drain, because this can be plumbed into your drain tray so it won't allow moisture and steam to be vented inside the machine.
    However I heard feedback that that valve was too big for a small domestic machine...
    So, in not suggesting any in particular.

  7. #7
    Senior Member Jackster's Avatar
    Join Date
    Nov 2017
    Location
    Maddington, Perth. Wa
    Posts
    864
    Thermostat or pressurestat is the thing branched off the antivac (that you circled in orange)

  8. #8
    Junior Member
    Join Date
    Feb 2007
    Posts
    18
    Quote Originally Posted by Jackster View Post
    The one you have circled with orange is your antivac valve.
    It should hiss a little till it boils, then shut off and build boiler pressure. Coffeeparts will have new ones.
    Or take it off, pull it apart and descaled/clean it.

    It has same antivac as my simonelli, so fairly generic.
    Good to know, my sister ran a descale last week might be something stuck in it. Thanks heaps for the tip

  9. #9
    Senior Member Jackster's Avatar
    Join Date
    Nov 2017
    Location
    Maddington, Perth. Wa
    Posts
    864
    Behmor Brazen - $249 - Free Freight
    A descale won't get up into clean that valve. Easier to undo it and soak it separately



Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •