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Discuss Turbo siphon half flush problem in the Plumbing Forum area at UKPlumbersForums.co.uk.

  1. SteveE

    SteveE New Member

    Recently fitted an adjustable Turbo 88 in my toilet, after my last siphon gave out. Full flush works really well (9L level) but holding the handle down- half flush only works occasionally (mostly goes on to do full flush) and there's no logic to when it does. We have a water meter and so I'd really like it to work as it says it will (though will be using full flush too). I've read several reviews and these siphons seem very good. Is there something obvious I should check that would stop reduced flush working or do you think I have just been unlucky and got a faulty siphon? The refill valve is not hitting c-link, which is the only thing the instructions say.
     
  2. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    Do you want it to half flush all the time ?
     
  3. SteveE

    SteveE New Member

    No I'd like it to do both. I forgot to say water level is at marked cistern height - 8 inches and spill over set just above it. I read half flush relies on 2 washers on top of piston rod, but I'm not clear what they need to do for it to work.
     
  4. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    Normally they come pre set so you can use the half flush

    Any chance you can take the handle off and use the c clip manual for a test ? (Just pull and hold the c clip vertically)

    Does half a flush work all the time ?
     
  5. SteveE

    SteveE New Member

    Just tried it. No it doesn't work goes on to do full flush.
    The washer to convert to single flush is still on the side and has 2 washers on top of piston rod as described so as far as I can tell it's set for dual flush.
     
  6. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    That is strange
     
  7. SteveE

    SteveE New Member

    In reviews many people are happy with dual flush option on this so sounds like it usually works. One mentioned top 2 valves separating and causing this problem (they glued them together) another one mentioned lowering water level 1.5cm which fixed this on both his toilets (I tried that but made no difference). Do you find half flush usually works?
     
  8. SteveE

    SteveE New Member

    I'm as sure as I can be it's been fitted correctly (with the full flush working it suggests it is) and with so many happy customers I can only think I have an odd faulty one where the half flush isnt right- though I can't quite see how if it's just the 2 washers that make it work.
     
  9. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    long shot but try removing the rubber washer (under the plastic hard one)

    Normally fit and forget, I've fitted hundreds in commercial buildings and only had one problem
     
  10. SteveE

    SteveE New Member

    Thanks for suggestion. I've just tried that, but still doing the same thing. Full flush almost like washer makes no difference.
     
  11. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    Sorry I can't be of more help might be worth giving dudley a call
     
  12. SteveE

    SteveE New Member

    Thanks for trying to help, yes will call them. Do you know if half flush relies on that washer sealing correctly- is that how it works?
     
  13. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    Shouldn't seal on half flush but seal on full
     
  14. Jones82

    Jones82 Member

    You have to hold the handle down for a good 5 seconds, literally until it stops flushing, I've never liked turbo siphons for this reason and usually fit a push button flush valve instead, although the buttons can look a little ugly on the front of a lever cistern.
     
  15. ShaunCorbs

    ShaunCorbs Trusted Plumber GSR Top Contributor!!

    for a half flush yes
     
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