How do I Calculate Volume of Water in my Central Heating System?

hollie.weimeraner
hollie.weimeraner Posts: 2,146 Forumite
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in In my home (includes DIY) MoneySaving
I have just had a radiator spring a leak and will be replacing it with a new one. Unfortunately the feed and return are both contained in the same valve which has a copper feed tube inserted into the Rad. In order to replace the radiator I am now having to drain the system and fit standard valves to it. While I'm doing this I may as well clean and flush the system (which isn't badly sludged) but need to calculate how much cleanser is needed (1% solution).

Anyone know how to calculate the volume of water please? System has 10mm pipework and 11 radiators and is installed in a detached 4 bedroomed house.

Comments

  • BobProperty
    BobProperty Posts: 3,245 Forumite
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    My immediate reaction is you don't need to. Most chemical cleaners are designed / formulated that one container worth is sufficient without overdosing in a small system and enough for a typical larger system. I'll go and look it up now.
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  • hollie.weimeraner
    hollie.weimeraner Posts: 2,146 Forumite
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    BobProperty wrote:
    My immediate reaction is you don't need to. Most chemical cleaners are designed / formulated that one container worth is sufficient without overdosing in a small system and enough for a typical larger system. I'll go and look it up now.

    Thanks - it's just that the cleansing solution is in a 1 litre container which doesn't seem a great deal to me:question:
  • espresso
    espresso Posts: 16,446 Forumite
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    hollie.weimeraner wrote:
    Thanks - it's just that the cleansing solution is in a 1 litre container which doesn't seem a great deal to me:question:

    It is concentrated. On the 1L Sentinel container, it states that it should be sufficient for a typical central heating system i.e. 100 litres.
    :doh: Blue text on this forum usually signifies hyperlinks, so click on them!..:wall:
  • BobProperty
    BobProperty Posts: 3,245 Forumite
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    DS-40 is the only one I can immediately spot that needs a calculation to work out how much to use. But then you shouldn't be using DS-40 in your situation. (you said the radiator was leaking, plus you have very old style double entry valves)
    Which product have you got?
    A house isn't a home without a cat.
    Those are my principles. If you don't like them, I have others.
    I have writer's block - I can't begin to tell you about it.
    You told me again you preferred handsome men but for me you would make an exception.
    It's a recession when your neighbour loses his job; it's a depression when you lose yours.
  • hollie.weimeraner
    hollie.weimeraner Posts: 2,146 Forumite
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    I have removed the radiator already as it had developed a fracture (on the rear unfortunately). Not sure whether you're referring to the heating system or cleanser when you mention what product have I got.

    I haven't got the cleanser at the moment but was looking at Sentinel which Plumb Centre sell in 1 litre bottles. (On the website it does mention a 1% solution which as stated above is suitable for 100 litres) I have used fernox or ferinox in the past as an inhibitor which seems to have kept the system pretty clean.

    It's not a great problem to replace the old double entry valves, just inconvenient really
  • orainsear
    orainsear Posts: 323 Forumite
    What is the name of the product that you have bought?

    Edit: Just noticed your post. For a system of the size you have described, if you are using the Sentinel X400 it would be recommended to use the full 1 litre.
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