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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."
Hi, we had pump, 3 way valve replaced before xmas. One radiator needs constant bleeding so I assume air must be getting in from somewhere.
Is this a valid assumption or is it possible that the systems is still trying to purge the air and it is settleing in this one rad.
If air is getting in -...
Hi all,
Just come across a boiler with no FGA test point, so looks like in going to have to drill the flue 12 inches above the boiler to get a reading.
Was just wondering if silver foil tape can be used to then seal the hole, im trying to find something in the regs about using foil tape...
Ryster
Thread
about
fga
oil
point
reading
sealing
silver
suitable
tap
test
Hello,
Im looking at a new build unit and thing is I have a soil pipe, see picture that I feel is to high for any standard toilet, that hole in the wall has the connector point on the down pipe.
Thing is I dont have a lot of money and think this might cost me a lot more to put right...
ukbill69
Thread
connector
floor
help
high
pipe
point
right
thing
waste
waste pipe
Hi,
I want to drain my central heating system to allow me to fit TRV's to the radiators in the bedroom and also put some cleaner through the system.
I can't seem to find a drain point on the pipework, however there seems to be a drain on the pipework at the rear of the boiler (manual calls...
jiffi77
Thread
advice
boiler
central
central heating system
drain
draining
point
system
valve
Existing installation: System boiler running 22mm gas pipe
Operation pressure at meter 20mb
Inlet pressure at boiler 16mb
Burner pressure OK
Gas rate OK
As there's a drop across the installation over the 1mb allowance, what would you do?
hi all, i'm sure i'm not the only plumber who has had issues with rouge customers so thought i would put this up and see how you guys would deal with it.
over the past 12 months i have carried out various maintenance and repair work for a guy who manages quite a few properties for various...
Had a call today from someone who wanted a new Flavel radiant gas fire fitted. She told me it was a direct replacement.
"Ok" I said"I'll come and have a look"
"How much will it cost"
"Well,I can't say until I see it,but probably around £100" I replied
"Oh,well I'd better leave it then,I've...
Hi, having trouble with a gas fire as some might have read in previous post.
10mm gas pipe feeding fire kinked and not protected comming out of floor in fron of fire. Small amount of sooting on chair brick. Little signs of being serviced recently. Data badge mostly peeled off so not readable...
princegoose
Thread
calling
experts
gas
gas fire
opening
point
required
Morning all,
Im after a little advise on installing pipework to an existing oil fired boiler.
I am replacing a rusty old tank with a plastic one in a new location so need to install new pipework. Im going with 10mm Qual pipe buried 450mm below ground but need to know where the pipe is...
Cynergy
Thread
building
copper
installation
oftec
oil
oil tank
pipework
point
query
tank
ticket
Hi, newbie here. Just wondering if anyone knows of a stockist in the newcastle area where I can get spare meter test point screws from? I can see BES sell a complete test nipple with 1/8 inch thread but noticed a previous post on here which said it was not the correct size. These things seem to...
Hello guys, looking for some advice from service engineers out there about the old Worcester boiler range, e.g. the 35 CDi RSF approx 2002 era!!
My query is, where do i stick the gas analyser!!! All the boiler has is a "flue gas sample point" with a red cap on it! My analyser wont fit in there...
following on from last weeks worst poll,which ideal won and win the prestigious "tat manufacturer of 2011" title,whos the best?if i leave any make out its nothing personnel
I'm thinking of replacing my 20+ years-old SMC Commodore pump. It is running well and quiet but I think surely it won't last forever!
I'd like to know if there is any point in installing a Grundfos Alpha 2. I find the Grundfos litrature to be a bit vague but it seems the Alpha 2 would be of...
went to a 3 year old Warmflow oil bluebird boiler today.
no heat first thing this morning, pressed the reset but only a bit of life then lock out, suspected oil flow was an issue, put a pressure gauge on and got her fired up,
fitted new jet, cleaned photcell etc
pressure was there (8bar)...
Hello
Im 23 years old and now coming to the end of a two year City & Guilds 6129 plumbing course which i have funded myself. After three years of applying previously and during the course im just having no luck in finding an employer which is willing to take me on (recession!). Im at a stage...
tractor_boy
Thread
6129
advertising
advice
career
city
costs
direction
eco
guilds
insurance
job
jobs
maybe
plumbers
plumbing
point
price
pricing
problem
right
running costs
tee
tools
training
van
work
Hi Perhaps i am missing something,
Say in a house some one puts on TRV on all the rads except the one where the room stat is, - how can this save money?
The boiler will always be on regardless of if the TRVs are open or shut - isnt it governed by timer and room stat for one room?
At a guess...
boiler
boilers
central heating system
cold
control
fitting
flow
heat loss
hot
point
problem
radiator
radiator valves
save money
system
temperature
thermostat
thermostatic
timer
trv
valves
whats
work
hi, basically im 19 and have been carrying out the 6129 certificate with easy plumb training but after reading various threads on here it seems that this is a complete waste of time. my plan was to complete this certificate and then team up with a tiler or do a tiling course and start up as a...
nye
Thread
6129
apprentice
bathroom
copper
gas
gas training
head
hose
nvq
pipes
plumber
plumbers
plumbing
point
qualification
regulations
safe
tiling
training
waste
work
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