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    Alpha Combi Boiler Pressure Issue

    You need to set the pressure of the system when it is cold, not while running it hot it will give a false reading and naturally will drop while cooling down.
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    Vokera Excell 80SP Intermittent hot water

    Replace the diaphragm, its a 10 min job.
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    site admin

    As you have said, being registered with OFTEC makes notifying simple, however you can also notify through NAPIT if you are registered with them, would have thought that CORGI would have jumped on the bandwagon by now. I just notify building control, £58.75, they never bother to inspect. 9K...
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    Using Multiples Taps same time

    Considering the OP has'nt devulged any information what so ever about what system or supplies they have, I can recommend anything.
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    Using Multiples Taps same time

    Plumbcenter...£1495.45 plus fitting. No, if you know what you are doing and you have an unvented ticket.
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    Using Multiples Taps same time

    Thats what you get for living in such an affluent area.:wink: Although I do have one customer with no water or mains supply, waiting for a borehole to be drilled out.
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    Using Multiples Taps same time

    Yes, just have a new 25mm mains water supply connect to an unvented cylinder and bobs your uncle.
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    Unvented Cylinder and Boiler

    Yes, this system requires one.
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    site admin

    There is no need to be registered with oftec, however it simplifys notification.
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    system or combi with a twist..

    Yes, use a pluming kit.
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    system or combi with a twist..

    Check the flow rate from the kitchen tap(bucket and stop watch, how many litres per minute) and again with another mains water tap open. You may need to get your incoming mains upgraded, increasing the pipe size internally will not help unless its from the tanks.
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    system or combi with a twist..

    Forget the system boiler then and use a combi, you could always add an unvented cylinder at a later date, which does not require attic tanks. The closer the boiler is to the draw off points the better. Assuming of course that your mains pressure is sufficient to cope with a combi and an...
  13. G

    Can you solve my Vaillant combi boiler problem, Sherlock?

    Just replace the water valve.
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    leaking taps (new)

    Silicon sealant.
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    Hot Water From Overflow ?

    Could be the replacement valve is not opening/closing, smoothly causing pipe chatter.
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    Air brick

    I believe it to be up to 5kw, not required. DFE gas fires requires a vent, even below 7kw.
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    pipe sleeving

    Would'nt want gas escaping into a cavity now would we, they do have them in stud walls you know, and how are you suppose to seal a sleeve through an airbrick, does'nt seem like you gave it much thought.
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    New boiler and gas pipe size

    Yes, 22mm, depending on distance, amount of bends, could even make it to 28mm in part.
  19. G

    new boiler

    £1985.00 inclusive
  20. G

    Lockout

    Are we talking about the one for the fire valve.
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