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boiling
Boiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere. There are two main types of boiling: nucleate boiling where small bubbles of vapour form at discrete points, and critical heat flux boiling where the boiling surface is heated above a certain critical temperature and a film of vapor forms on the surface. Transition boiling is an intermediate, unstable form of boiling with elements of both types. The boiling point of water is 100 °C or 212 °F but is lower with the decreased atmospheric pressure found at higher altitudes.
Boiling water is used as a method of making it potable by killing microbes and viruses that may be present. The sensitivity of different micro-organisms to heat varies, but if water is held at 100 °C (212 °F) for one minute, most micro-organisms and viruses are inactivated. Ten minutes at a temperature of 70 °C (158 °F) is also sufficient for most bacteria.
Boiling water is also used in several cooking methods including boiling, steaming, and poaching.
Hi - hope someone can help.
We had a new boiler installed a few weeks ago, since then we have had a major problem with air in the system, The system needs bleeding 2-3 times a day.
To cut a long story short, I do not trust the company to put it right because to be honest they seem incompetent...
Bob1985
Thread
air
bleeding
boiler
boiling
central heating system
expansion
gas
gas pipe
header
header tank
mains
noise
pipe
plumber
plumbing
problem
pump
radiators
supply
system
tank
temperature
valves
water
work
Very rarely work on LPG (and yes I do have LPG cert) was looking for someone with more experience on LPG, basically I have noticed on the past 3 LPG jobs inlet pressure at blr was low 28-33mb, ecv to house was approx 2-4m from blr and from the ecv was 22mm pipe, has anyone else come across...
Jay_1981
Thread
10mm
22mm
boiler
boiling
cold
flame
gas
high
inlet
jobs
lpg
manual
pipe
pressure
problem
tank
temperature
wall
work
Hi,
I have an indirect hot water system and when I switch on the hot tap in both bathrooms the water is boiling hot and very eratic. It seems like there is air in the system, could it be coming from the open vent pipe?
The kitchen tap works fine.
Would it be a good idea to change the vent...
Fresh
Thread
22mm
28mm
air
bath
boiling
cistern
cold
cold water
cold water storage
cylinder
hot
hot water
hot water system
indirect
kitchen
pipe
problem
switch
system
tap
taps
valve
vent
water
I have a Vailant vcw240, approx 14 yrs old, still doing excellent service, but recently the pilot light has been going out.
I had originally thought that it was blowing out due to a draught, but yesterday I was watching it when a lot of hot water was being drawn off. Just after the tap was...
mark
Thread
after
bar
boiler
boilers
boiling
central heating system
cold
cold water
combi
cutting
cutting out
dhw
flush
flushing
gas
high
hot
hot water
inside
pilot
pilot light
pressure
shower
supply
system
tap
temperature
thermal
vailant
water
Can anyone please explain to me why the hot water coming out of my bath tap is only around 35 degrees, not hot enough for a bath? The other taps and the shower unit (uses boiler hot water not electrically heated) are all boiling hot. Even the sink tap in the bathroom is really hot and it's...
benito
Thread
22mm
basin
bath
bathroom
boiler
boiling
cold
combi
combi boiler
flow
hot
hot water
mains
mixer
mixer tap
mystery
piping
pressure
shower
sink
tap
taps
tips
valve
water
work
I have a Worcester Danesmoor 15/19 oil boiler, its got an electronic timer module.
Lat year we had the boiler moved from one room to another as its noisy and gets in the way.
The problem is:
When the central heating is on the water heating is always on as well, we get red hot water all...
whiskeyfrank
Thread
boiler
boilers
boiling
button
central
central heating system
cold
electric
electronic
hot
hot water
noisy
oil
pipes
plumber
problem
showers
system
timer
valve
valves
water
worcester
worcester boiler
y plan
Please help! I installed 7 new rads (and new TRV's) mostly doubles to my 3 bed semi a year ago, (I have a one pipe CH system), i then replaced the boiler with a Heatline condensing in the summer, it was all tested and the rads were piping hot. Then, when the weather started getting cooler...
bluebouye
Thread
bleed
boiler
boilers
boiling
condensing
convert
filling loop
flow
gravity
head
hot
hot water
pipe
piping
plumber
pressure
pump
radiator
radiators
system
trv
valve
valves
warm
water
water pressure
Hello all, right down to buisness I have a boiler that when running has a banging noise a bit like a "buh.....buh.buh...buh" the flame pic through the observation window is fine and I slackened off the bleed screw on the heating coil inside the burner but there apeared to be no trapped air, I...
mobile chicane
Thread
air
banging
bleed
boiler
boiling
burner
central heating system
cheap
corgi
flame
flow
gas
glowworm
inside
manual
noise
oil
pipe
pipes
problem
pump
screw
system
water
We had problems with our header tank overfilling and water going out the overflow. 6 British Gas engineers and 3 ballcocks/ballvalves later turns out that pressure from the kitchen hot tap was causing water to back feed the water tank causing the overflow. The last engineer has since turned off...
Emma0912
Thread
bath
bathroom
boiler
boiling
central
central heating system
cold
cold water
gas
header
header tank
help
hot
hot water
kitchen
overflow
pipe
pressure
tank
tap
taps
valve
water
water tap
Friend has bought a ex council apartment. The heating and hot water is supplied etc. All he has in the property is a cold water tank a a immersion heater.
Checked yesterday as they said the hot water is not longer that hot. Supply to tank (Immersion) is perfect . But water coming from it is...
Londonluke
Thread
air
bath
boiler
boiling
central
central heating system
cold
cold water
cold water tank
combi
cylinder
drain
heater
hot
hot water
immersion heater
issue
pressure
problem
supplied
supply
system
tank
tap
taps
water
Hi
I have a bristan Pisa shower and basically when i turn the shower on it is boiling. when you turn it down to the required temperature it stays warm for a short while before going luke warm, even though there is hot water in the rest of the house. if you try and turn the shower up it won't...
Ed25
Thread
boiling
bristan
fault
hot
hot water
issues
pipe
short
shower
tank
temperature
thermostatic
valve
water
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