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Replacement hot water cylinder

Discussion in 'Plumbing and Central Heating' started by Numpty 1 million, 9 May 2017.

  1. Numpty 1 million

    Numpty 1 million

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    Apologies if this question has been posted before, I did try searching...

    Need a replacement hot water cylinder. Replacing a 1970s copper one. I believe I need an indirect vented cylinder with no coil inside. Set up is similar to any indirect system but hot is heated from an old AGA, no pumps/CH/electric currently attached. My basic understanding is that I should be wary of (the current) standard cylinders with a coil as they suit pumped systems.

    Anyone got some suggestions as to what I should buy or be searching for?

    Looking for about 120 L, Water in/out is 18mm and AGA in/out is 28mm.

    Looking for the simplest solution. If I haven't explained things well please ask for further info.

    Thanks A.
     
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  3. Dan Robinson

    Dan Robinson

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    Indirect means it has a coil.
     
  4. Numpty 1 million

    Numpty 1 million

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    OK, the current/old one doesn't have a coil but the plumbing set up is the same as an indirect system. Any suggestions?
     
  5. Dan Robinson

    Dan Robinson

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    Unless you have a Primatic system, you have a coil.
     
  6. Numpty 1 million

    Numpty 1 million

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    There is no coil. I can stick my finger through the holes and feel the inside of the cylinder in all directions. Does this mean I have a Primatic system and if so how certain are you about that or should I await a second or third opinion. Not saying you are wrong (I don't know) just asking...
     
  7. Dan Robinson

    Dan Robinson

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    How many cisterns in the loft?
     
  8. polesapart

    polesapart

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    You'll need a cylinder with a gravity coil. Newark cylinders are good for bespoke.

    This is based on the answer to Dan's question being two, one big one small.
     
  9. Numpty 1 million

    Numpty 1 million

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    3 water tanks in the loft, all connected and act as one. 'Overflow/vent' pipe from top of cylinder goes into top of one of the tanks in a classic 'indirect vented' way. Tanks/system supply hot and cold water throughout house, only other cold comes from kitchen tap that comes direct from mains.
     
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  11. Numpty 1 million

    Numpty 1 million

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    I should add that the installer of the system wasn't known for his expertise rather how to do things on the cheap!
     
  12. Elastomeric

    Elastomeric

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    If there is no coil in it, how is the water getting heated ?

    I habe a Rayburn doing mine, small tank to feed the heating circuit, through the coil in the tank.
     
  13. Dan Robinson

    Dan Robinson

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    primatic1.jpg

    This is a primatic. Few and far between now.

    Thankfully .
     
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  14. Numpty 1 million

    Numpty 1 million

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  15. Numpty 1 million

    Numpty 1 million

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    Would I be able to tell whether the system was primatic or not by feeling inside? From what I feel the inlet pipe goes in and that is that, shining a torch through the hole appears to confirm that. The AGA output is close to the top of the cylinder (but still on the side). Beginning to look like I do need a gravity coil which means bespoke :(
     
  16. Nige F

    Nige F

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    That's a classic Direct way because the tanks "act as one" Perhaps a picture of the connections to the hot water cylinder will give us a clue,
     
  17. Numpty 1 million

    Numpty 1 million

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    Just move the top outlet from the AGA/Boiler to the very top of the vertical side of the cylinder in the diagram above about Primatic systems and that is what I have - ignore internal cylinder stuff.
     
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