Search the forum,

point

The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at a standard pressure such as 1 atmosphere or 100 kPa.
When considered as the temperature of the reverse change from liquid to solid, it is referred to as the freezing point or crystallization point. Because of the ability of substances to supercool, the freezing point can easily appear to be below its actual value. When the "characteristic freezing point" of a substance is determined, in fact, the actual methodology is almost always "the principle of observing the disappearance rather than the formation of ice, that is, the melting point."

View More On Wikipedia.org
Recent contents Top users
  1. S

    Would you use this piece of software if available? Why? At what price point?

    Hi guys. I've been running an UFH installation/ repair business for 7 years now and one of my main frustrations is finding the parts for the UFH. I've got quite good at it over the years being able to recognise the manifold brand and generation by just looking at it but then I have to go through...
  2. Uncle Nick

    Room thermostat, what’s the point?

    Hi all, as it’s starting to get chilly at night, we’re thinking of having the heating on at night… well the wife is. Which led me to wonder whats the point of having a room stat when the radiators all have their own thermostat controls? We currently have just a time controller for the heating...
  3. J

    Boiler test point cap missing.

    Hello my dad had a boiler check up today and the cap on the flue above the boiler had fell off. It's potentially been like that for a long time. Was this dangerous? We have a carbon monoxide detector but that never went off. I have posted a picture below of the little cap, the engineer...
  4. D

    Loft location at a higher point than soil vent

    Hi there I have an existing soil stack on the side of my house. I have extended the house by building a loft. The loft company ran the waste from the loft over the roof straight into (i.e. closing off) what was the soil pipe - and added an AAV at loft level. However now I am reroofing and...
  5. B

    What to do with a rodding point.

    I started digging up my garden to lay some new patio slabs and found this (rodding point, I believe) covered with grass. The new slabs will be an inch or so above the level of the old ones. What are my options for dealing with this?
  6. E

    Soilstack rodding point

    I have an internal soilstack with limited accesability. The soilstack has a rodding point similar to picture below. I need to attach a 40 mm waste pipe to where the ridding cover is. My question is ther an adaptor for this job?? Thanks Eddy
  7. J

    Dew point on condensing boilers

    Can anyone tell me the dew points in kerosene and natural gas condensing boilers please.cant find answer online
    • Johnyc86
    • Thread
    • america boilers condensing point usa
    • Replies: 4
    • Forum: USA
  8. I

    Is this a waste access point?

    I had to do work on waste pipe and uncovered this (as shown in the photograph) is it a access point that some one has either broken or left uncovered. There was just a cloth stuffed in it. It looks as though it is threaded. I would of investigated further but the people there were closing up and...
    • Illuminate
    • Thread
    • access america point usa waste
    • Replies: 8
    • Forum: USA
  9. siricosm

    Dew point of gas-hydrogen blends

    With all this talk about potentially switching from gas to hydrogen or even blending some hydrogen into the gas, does anyone know how this affects the dew point of the products of combustion? With natural gas I think it starts to condense around 57C or so, so the return temperature needs to be...
  10. H

    Gas Valve - Inlet Test Point and Burner Test Point screws

    Hello, Some advise please. Doing my gas course so I have taken a few boilers home to practise taking them apart so I can understand more how they work. For the gas valve in a Worcester boiler I got my hands on I have been trying to undo the screws for the Inlet test point and Burner test...
    • hayati
    • Thread
    • burner gas gas boiler gas engineer gas valve inlet point screws test valve
    • Replies: 5
    • Forum: Gas Engineers Forum
  11. C

    At what point do accumulators need consideration?

    Hi all I currently have a Combi boiler in my own house and as part of my extension work I'm looking to switch over to an unvented system as there'll be times when I will have two showers running at the same time etc.. I also want to future proof DHW by having the option to add solar for the...
    • Cranbrook
    • Thread
    • america point usa
    • Replies: 10
    • Forum: USA
  12. D

    Should I go with tankless point of use water heaters?

    Hi, I'm renovating (rewiring electricity, redoing and adding water pipes, gas pipes, moving walls) a house for the first time ever and, among other things, I will need to sort out hot water. Understandably, I have some questions. It's a very small house currently with only a kitchenette...
    • Deleted member 115596
    • Thread
    • america heaters point should tankless usa water
    • Replies: 5
    • Forum: USA
  13. F

    Fitting an Airvalve / bleeding point in central heating

    Hello, total plumbing noob here. I have a sneaking suspicion that the pipes in my house that run all the way to the attic are full of air (picture attached of pipes). These are the pipes that used to be fitted to an older hot water tank which was removed and replaced with a combi boiler- but...
    • FluffyWaffles
    • Thread
    • america bleeding central central heating central heating system fitting heating point usa
    • Replies: 1
    • Forum: USA
  14. leelister6

    Focal point gas fire logs

    Have a customer with a Focal Point Colima fire and the logs and log support are missing. Focal point have informed me that these are now obsolete. Had a trawl through web and unable to find anyone who does them. Are there any companies that you chaps use that may be able to supply? Thanks
  15. Ted808

    any one work for PLumbers Point LTD?

    Hi has any one worked for these guys? I'm looking for extra work and they offer £30 an hour jobs, parts you supply and charge for separately, self employed basis obviously. What do you think? Hopefully work will be local only at that price!
  16. C

    Boiler Flues in High Rise Blocks of Flats Deemed Possible Fire Ingress Point on Post-Grenfell Fire Regulations Review

    Sorry - I should have posted this in the Central Heating section. Hello All, I don`t know how many Members would be affected by this and at present it is only a Boiler Manufacturers interpretation of possible amendments to the Building Regulations Fire protection relating to Boilers in Flats...
  17. J

    Radiator Single Entry Point

    Hi, can anyone tell me if this is possible, and if i would need to fit the internal 'lance' to a some sort of valve? Or do radiators come with the lance already installed?
  18. W

    What do you think this might point to?

    My mum recently moved into a bungalow. Starts getting high water bills. They then tell her she's averaging 500 litres used a day so I go to investigate. No obvious leaks. It's a combi so could only be hot and cold leaking and it's solid floors with no pipes (that I can tell from initial...
  19. F

    Analyser test point access problem

    Evening all, How do you deal with unaccessable flue test points. Normally I'll just test from outside but I looked at a boiler with a plume kit fitted. The boiler was in a kitchen cupboard with a side exit flue which meant that i couldn't get the probe in the test point. I've looked on Kanes web...
  20. V

    Tap tail adaptors,what is the point?

    Does anybody use these?I've always connected a flexi hose tap connector end directly to a service valve and never had any problems. You have to make another compression joint between the service valve and the tap tail adaptors and then just screw the flexi hose to that. What is the point, or am...
Creating content since 2001. Untold Media.

Newest Plumbing Threads

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock