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chemicals

A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be simple substances, chemical compounds, or alloys. Chemical elements may or may not be included in the definition, depending on expert viewpoint.Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical.
Chemical substances exist as solids, liquids, gases, or plasma, and may change between these phases of matter with changes in temperature or pressure and time. Chemical substances may be combined or converted to others by means of chemical reactions.

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  1. T

    Chemicals etc

    After seeing the thread about "blast tubes" (whatever the hell they are, won't catch me with oily fingers) I started thinking about what chemicals you keep in the fan for gas work, cleaners, lubricants etc? I.e. What do you find the best lubricant for a sticky fan?
  2. A

    Boiler install at the weekend. Cheapest chemicals and TRV's?

    Hi guys I have a combi swap to do at the weekend (for my landlord). He wants the cheapest of everything, what are the cheapest cleaning chemicals and inhibitor available and also will be using cheapest TRV's I can get. Any recommendations? Thanks
  3. B

    Cleaning the Central Heating system

    Having put cleaner solution into my C.H system. How do i circulate the water without running the heating. I have tried turning the Boiler Thermo down but this just shuts off the whole system. Any advice please.
    • BrinFranks
    • Thread
    • better boiler central central heating system chemicals cleaner cleaning heating system system
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  4. M

    which chemicals and test kits?

    Who uses one? I'm thinking of using the Fernox water test kit during an annual service, how many tests does the kit last for? I've been doing a lot of research and it appears there is no universal test for checking inhibitor levels as different manufacturer's chemicals vary greatly. The other...
  5. Scott_D

    Cheap chemicals on ebay

    Just been having a look on eBay at cleaners and inhibitors. Lots of stupidly cheap branded stuff for sale. Does anyone buy it this way? Is it out of date or stolen?
  6. A

    bad sunday

    thought i had a nice lucrative private job for sunday customer wanted a powerflush so i quietly borrowed the flushing machine from work. Managed to over order and have left over chemicals from another powerflush job. went to the job this morning, desided to connect flushing machine by...
  7. P

    My first power flush

    Hi guys I'm doing my first powerflush with my shiny new machine and need to know a few things, the boiler that I am fittin is a Worcester 34 CDI and in the instructions it says when possible power flush from existing pump but there is no appliance here, what would the best place to connect onto...
  8. P

    Chemicals in Oil

    We use two types of oils motor oil and food oil. in motor oil chemicals are mixed. Which are those chemicals ?
  9. A

    Power Flushing Chemicals

    whats your current choice/preference of power flushing chemicals and inhibitor for systems with and without aluminium. Also please give your opinions on any other chemicals you have tried if you can. thanks, Adam.
  10. A

    Problems after power flush

    Hi, glad to have found this problem. I have an issue with our heating system. After a pressure issue was resolved, our engingeer suggested a power flush, which we did. All fine for 2 months, now it has broken down - the heat exchanger is blocked and the magnetic filter has an inch of crap...
    • adeltheman
    • Thread
    • after chemicals flush flushing power power flush problems system
    • Replies: 45
    • Forum: Plumbing Jobs | The Job-board
  11. J

    Which chemicals?

    I usually use x800 or Hyperflush, But I am unsure which is best, When using Hyperflush it doesnt seem to work properly, reading up on it apparently, you should run central heating for an hour with chemicals in before flushing. X800 is more expensive but seems to be the most effective, anybody...
  12. A

    central heating cleaning chemicals

    Hi , Just wondering about the likes of Fernox F1/F3 etc - is it better to add to a system and let it run for a week or so and then powerflush or is it OK to just treat on the day of the flush. Don't fancy having to make a double trip every time thanks dave ps intend to flush out with a...
  13. K

    POWER FLUSHING.. How do you rate it.

    So ive seen toms tips on youtube and he flushes a heating system using the outside tap and a couple of hoses. I also know a plumber who prefers to just take the radiators off and give them a rince through outside. i was on work experience once when i witnessed a system being powerflushed but it...
  14. cr0ft

    Fernox Chemicals

    Are these worth it or not in your opinion? They're around 2x the price of other central heating chemicals so I've never tried them. Do they make any difference?
  15. H

    power flushing chemicals

    hi just lookin a bita info from u power flushing guys .I just recently got a kamco cf90 and combimag and just startin out in power flushing wat chemicals is the best for flushing that can all be done in 1 day or wat chemicals u prefere to use that keeps the cost down and does the job well
  16. P

    Swimming Pools

    Unusual question hear people but will copper be ok to run an attachment for a hose for an indoor swimming pool? Probably a silly question but just thinking because of all the chlorine n such like might perhaps corrode it?
  17. P

    Causes of Ketteling

    Hi, Ive got a call out for tomorrow where the customer says the boiler is ketteling constantly. My guesses are. Scaled up heat exchanger faulty thermostat Can anyone make anymore suggestions? has anyoe had any luck with the chemicals you can get to sort the problem out? My old boss swore...
  18. R

    drain cleaning chemicals

    got a job next week, there is a 8 meter straight run under flooring through kitchen and bedroom of 40mm proberbly pushfit. it is a straight run to the upstand to the sink trap and it is running slow, the run of only appears to be 8'' over all as its within the joists. i may be able to rod...
    • REDSAW
    • Thread
    • 40mm cable chemicals cleaning difficult drain drains job kitchen pipe pipes price problem rodding sink system trap travel wall waste waste pipe water work
    • Replies: 28
    • Forum: Plumbing Jobs | The Job-board
  19. W

    New Boiler - hot water smells of chemicals

    Hi, another question on my new boiler. When the hot water tap is turned on, as soon as the hot water starts coming out there is a very strong chemically smell to the water (and it also tastes bad). The small lasts for about 10 seconds, then is not very noticeable. It does not smell of...
    • Woody2244
    • Thread
    • boiler central central heating system check valve chemicals cold filling loop gas gas safe hot hot water new boiler oil pipes problem remove rubber safe smell smells tap vaillant valve water water tap
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
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