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  1. Madrab

    Combi boiler pressure still going up after adding new expansion vessel

    Fair shout but I think they were both closed to start with
  2. Madrab

    Combi boiler pressure still going up after adding new expansion vessel

    Not really as it Belgian but given there is a flow arrow and the fitting is elongated, I would confirm if it was a check valve. No difference really as to how they work but the one that's been fitted it the type that comes internally to the boiler and would be fitted within the case as they...
  3. Madrab

    Combi boiler pressure still going up after adding new expansion vessel

    Oh my, that's a bit of a riot in there. I don't care what country he's from, that's the most shocking excuse for an acceptable install of an external Expansion Vessel (EV) I've ever seen. I'd like to bet that the filling loop has a check valve in it (the connection just in front of the red...
  4. Madrab

    Pipe through wall and insulation

    Is this pipe to be run on the external wall? If so then an external conduit will be needed with specific external specc'd insulation.
  5. Madrab

    Confused As Hell - Boilers

    Really depends on what the current gas supply and current draw is ... plumber 3 may be correct in suggesting that the current meter does not have the capacity to supply everything at one time and if he is then the other 2 are muppets for not considering that component.
  6. Madrab

    Leak on Unvented Cylinder / Central Heating - A Puzzling Situation

    The CH and the HW are all on the same pipework albeit they are controlled separately by their own valve so bleeding the towel rad will always drop the system pressure. if there is a leak on the primary pipes/connection to the cylinder then when it leaks then the system pressure will also drop...
  7. Madrab

    Connecting underfloor heating to CH System.

    The Si has an internal bypass but if the system is an S plan or all TRV's then ideally an auto bypass would be fitted, it needs to be before the CH's 2 port valve.
  8. Madrab

    Is my expansion vessel too small?

    Unvented cylinders are a regulated appliance and they shouldn't really be played about with by anyone that isn't qualified. My advice would be to get your system serviced by a qualified unvented engineer.
  9. Madrab

    Best place/brand for anthracite vertical/horizontal CH radiators?

    If you are talking about anthracite column rads then they cannot be compared to standard convection radiators, they don't work in the same way therefore their outputs cannot be compared either. The only thing that the modern column rads are good at is looking contemporary and are only good at...
  10. Madrab

    Capped pipe in floor - can it be left?

    Gas pipes aren't allowed to be boxed in now without vents. Ideally though the pipe should be cut back as close to the main supply as possible, that'll minimise the chances of issue in the future.
  11. Madrab

    Water pressure too high even after PRV

    Interesting and as @Johntheo5 posted >>>> straight from their website, in sections - overview & features and benefits https://www.reliancevalves.com/sites/rv/files/2022-06/Reliance%20Valves%20Predator%20Pressure%20Reducing%20Valves%20Data%20Sheet.pdf Whilst I wouldn't argue with their tech...
  12. Madrab

    Ideal logic water leak

    The traps in the Ideal are syphon traps - i.e. they get to a certain level then release the trap contents, rather than a water seal trap whereby they run constantly. Sounds like your trap isn't syphoning properly if the condensate is backing up in the sump. The way these can be tested is by...
  13. Madrab

    Problems sealing compression fittings.

    I buy them in packs of 100 and carry them all the time
  14. Madrab

    Ideal logic water leak

    If its just the gasket on the sump cover that's gone then just get a new sump cover, no need to replace the whole sump. Lots available https://www.ebay.co.uk/p/21035409022?iid=201348625907
  15. Madrab

    Problems sealing compression fittings.

    Nope ... copper every time. The trick is not to tighten them too much, too tight and they can leak. Brass can be much more problematic when it comes to being water/gas tight but with brass then you can get away with tightening them more without deforming. The trick with brass is getting then to...
  16. Madrab

    Auto air vent failure Worcester combi

    Chances are it was pretty apparent to the engineer from the colour of the system water (black), when they depressurised and drained the boiler to fit the new AAV.
  17. Madrab

    Problems sealing compression fittings.

    If a new compression fitting leaks then never try to tighten it past normal and it's will only damage the pipe. If it won't seal then time for a new copper olive or worst case a wrap or 2 of tape around the olive. Sometimes happens if the pipe is slightly undersized (loose olive) or slightly...
  18. Madrab

    Which type of water hammer arrestor?

    Because things can get confusing when old threads are resurrected, some answer the original post rather than the new question posted and most of 'long in the tooth' pro's on this forum, who can actually answer the questions just skim past it as it's old and it never gets the focus. Oh and...
  19. Madrab

    Bath taps not covering holes

    Use large SS washers or larger base plates
  20. Madrab

    Is my vertical radiator the wrong way round

    I think it needs replaced with something that will actually heat the space unless it's a small room or there's lots of them ;) Alternatively, if the flow is on the right and it's a double column then it needs taken off and turned around to work properly.
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