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combination cylinder

A combination puzzle, also known as a sequential move puzzle, is a puzzle which consists of a set of pieces which can be manipulated into different combinations by a group of operations. Many such puzzles are mechanical puzzles of polyhedral shape, consisting of multiple layers of pieces along each axis which can rotate independently of each other. Collectively known as twisty puzzles, the archetype of this kind of puzzle is the Rubik's Cube. Each rotating side is usually marked with different colours, intended to be scrambled, then 'solved' by a sequence of moves that sort the facets by colour. As a generalisation, combination puzzles also include mathematically defined examples either not yet or impossible to physically construct.

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  1. E

    Combination cylinder question.

    I have a very old combination cylinder in my flat currently that has the very annoying problem of mixing the cold and hot water together meaning the yield is only 50% of a total heated tank. I'm sure its due to the age of the unit which is approaching 25 years. Will a new...
    • enzyme
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    • Replies: 15
    • Forum: Plumbing Jobs | The Job-board
  2. T

    Combination indirect cylinder.

    Hi Gang Is it ok to use an indirect combination cylinder with a wood burning boiler stove? Thanks.
    • Triffid grower
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    • boiler combi combination combination cylinder cylinder fitting indirect leak radiator tips trv
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  3. L

    Water Tank in cupboard disaster

    Hi, can anybody help? Just before Christmas I heard bubbling noises coming from the hot water tank that sounded like a kettle boiling. I ignored it for couple of hours untill i smelt something like steam in the hallway. When i went out into the passage all my hallway was like a sauna!! I opened...
    • Loblonde
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    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  4. J

    'Slim' Combination hot water tank

    I have an old (leaking) combi hot water tank in a cupboard on 33cm wide. I've repaired it once but it has now corroded somewhere else and I need to swap it. However, as its very slim does anyone know where I can get one which will fit - or suggest an alternative ? The most narrow ones I...
    • John Cotton
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    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  5. A

    How to repressurise central heating system?

    Just wondering how do you do this? I think this is the filling loop. http://farm4.static.flickr.com/3384/3673173488_9e4ee1e020.jpg?v=0
    • anfield cabinet
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    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  6. S

    Replacing hot water system

    Hi I'm after some impartial advice... We live in a 2 bed house which we're currently decorating etc. The house is heated via storage heaters and panels. There's a cold water tank in the loft fed from the mains that feeds cold water to the bathroom and kitchen. In the front (Main) bedroom in...
    • Spod
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    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  7. R

    Unvented Cylinder

    Hi all, Its a while since I did my unvented hot water and im not sure what type this is (please see pics) The customer is looking to replace this cylinder, as im sure your aware modern unvented cylinders require a 22mm mains cold feed, from the pics it looks like this one only has a 15mm feed...
    • Red
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    • Replies: 14
    • Forum: Plumbing Jobs | The Job-board
  8. V

    no pressure to taps in en-suite

    Hi guys, got called out to a lady who just got a new en-suite bathroom fitted. since then she has not had very little pressure to the bathroom taps. there is a combined hot water tank/header tank that is on the same floor as the bathroom with the hot feed coming from the bottom of the tank...
    • Vinny
    • Thread
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    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  9. B

    Ecomomy 7 Water Heater Problems

    Hello All, I moved into a flat with an economy seven heating and water heaters. The water heater was installed in 2005 so it is quite new but I have had problems. Firstly I had to replace both elements. I didn't use plumbers tape on the thread and I have noticed signs of minor leaks. Should I...
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    • Replies: 7
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