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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.
I remember someone posted about these a year ago and the one they were asked to install was over £1,000. Noticed that there seems to be more of them available now and the prices, though still high, are coming down from the completely ridiculous.
I have a feeling that as prices continue to come...
Hello,
I have a Baxi WM boiler which lives in my loft, which is working normally. This afternoon I have discovered my hot water seems to be virtually non existant, but the radiators are scorching hot. Everything was fine yesterday so not sure whats gone wrong
I turned the heating off...
Michelle1972
Thread
boiling
could
heating
hot
hot water
lukewarm
motorised
oil
radiator
radiators
valve
water
we have recently upgraded an existing central heating system, and now have 16 radiators, and two seperate hot water tanks, fired by a Grant oil boiler 28-35kw. the room thermostat controls the heating system, and independent thermostats on the water tanks, which are both on independent zones...
Hi, can anyone help me?
I cannot seem to get the radiators in the bedrooms to turn off...!
The DANFOSS valve is set to *(Frost or 0) and they are still boiling hot. I have tried turning the knob the complete other way to see if the stat isn't on properly but it still remains HOT!
In addition...
sunny123
Thread
bedroom
boiler
boiling
brass
constantly
hot
oil
other
radiator
radiators
turning
i went to look at a house 2day and they what to fit a wood burning stove with a back boiler.
now the heating system is pressurised and there is a gas boiler system boiler with a vented cylinder upstairs
since the heating system is pressurised i would like to change it to a open vent system and...
mark_mc
Thread
assistance
boiler
boiling
central
central heating system
cold
convert
cylinder
gas
gas boiler
gas safe
hot
hot water
oil
open vented
pressure
pressurised
pump
safe
system
tank
water
work
Hi guys.
A bit of guidance if you please. Yesterday the upstairs bathroom sink and bath started draining exceptionally slow. When draining the sink it backs up into the bath a bit. Toilet flushes fine and the donstairs sink appears fine. It would appear I have a blockage somewhere within the...
block
Thread
basin
bath
bathroom
blockage
boiling
bubbling
drain
help
hot
kitchen
overflow
pipe
pipes
please
plug
problem
sink
tiles
toilet
water
work
I have been asked to insulate some outside waste pipes as these have frozen up and the inside sinks/basins no longer drain away..... (They poured boiling water over pipes to defrost and all ok)....
Never insulated waste pipes before and was wondering if anyone could suggest the best sort of...
UKPITA
Thread
40mm
boiler
boiling
cold
condensing
control
cylinder
difficult
drain
element
high
inside
insulation
lagging
pipe
pipes
problem
tap
waste
waste pipe
waste pipes
water
Our room thermostat for our central heating is above the hottest rad in the house and as such, to keep the room at 21C (we have small children) we have to keep the thermostat at 27C and always have something on it - such as wet washing.
Last week I noticed that the temperature on the...
acfrance
Thread
boiler
boiling
central
central heating system
cold
combi
combination
connect
eco
fix
gas
gas boiler
hot
pipe
pipes
plumber
problem
temperature
test
thermostat
Hi everyone, new to the forum so please be gentle.. lol
Have a problem with ch but hw fine. When trying to start heating it fires up sounds like the water is getting hot then shuts down, but demand light still remains on.
No warning lights :confused: Any help would be greatly appreciated...
rockhopper
Thread
air
bar
boiling
building
expansion
fix
heating
hot
modena
pressure
problem
pump
screw
sensor
silver
warning
water
Hi there i have a problem with a new woodburning stove with backboiler. It is on a gravity fed system but it doesnt seem to be working as it should. It will boil and release itself up to the header tank then repeat.There was an air lock in the circuit but i let it off at the hot water cylindar...
Coly Loughlin
Thread
air
airlock
back boiler
backboiler
boiler
boiling
building regs
fed
flush
gravity
gravity fed system
header
header tank
hose
hot
hot water
oil
pipe
plumber
problem
radiators
system
tank
temperature
vent
water
came across this in a 3 story house ! i suspect the expansion pipe is not high enough in loft as the roof is just over tank , how and ever , has anyone else come across this problem ?
col
dublin plumber
Thread
bar
boiler
boiling
central heating system
domestic
electric
expansion
high
hot
hot water
loft
pipe
pressure
problem
system
tank
valve
vessel
water
Hi, about six months ago a plumber installed a new Albion ultraseel 180 litre cylinder. The information on the commissioning information says I have a primary open vented boiler.
The mains pressure is 3 bar, and a strainer has been fitted. The installler set the water temp. at 60 degrees, i...
RickF
Thread
bar
boiler
boiling
commissioning
cylinder
fault
hammer
hot
hot water
mains
noise
open vented
pipe
pipes
plumber
pressure
primary
problem
sink
tank
temp
thermostat
valve
vessel
water
Hi all
Can anyone help?
My boiler: Ideal C24/C28 mini HE. 3 years old. Draining the system down to add the rad, the water was nice and clear though we are in a hard water area.
3/4 days ago a gas safe plumber extended my gas feed to my kitchen for a new range and extended the central...
capitanpugwash
Thread
after
boiler
boiling
central
central heating system
circuit
dhw
diy
filter
flow
gas
gas boiler
gas safe
hot
ideal
kitchen
lights
noise
parts
pipe
plumber
plumbing
primary
safe
shower
system
tap
temp
temperature
water
work
Hi all
I have a link up system with a dunsley neutraliser. This is connected to a sealed unvented hot water cylinder and a standard gravity fed and pumped central heating system. Both my back boiler and oil fired boiler feed to the neutraliser. The hot water system is protected by plenty of...
djboyd
Thread
back boiler
boiler
boiling
central
central heating system
cold
cylinder
fed
gravity
header
header tank
hot
hot water
hot water cylinder
hot water system
internet
oil
power
safe
safety
sealed
steam
system
tank
unvented
valve
water
I am a private tenant, from Dec 2009 until Feb 2010 I was without hot water in my rented property, landlord arranged for electricians / plumbers and maintenance men to fix the heater, After 7 weeks between them they finally fixed the heater by changing immersion and thermostat and also fixed...
rgriff
Thread
boiler
boilers
boiling
drain
electric
electricians
fix
gas
heater
hot
hot water
hot water supply
immersion
immersion heater
leak
leaking
no hot water
plumber
plumbers
private
property
safe
safety
shower
supply
tank
unvented
water
weeks
work
My entry is:
On a bathroom install, I was de-tiling the bathroom after duly removing the suite, when the customer comes in the room in slippers and dressing gown and starts shovelling the tiles into rubble sacks!
I was so gob smacked I told her I was going to do that (like about 10 time...
hi called to job change b/valve as was shot its a old b/boiler system put new b/valve on its shutting off ok but call back today its filling up again could it be a blocked cold feed and is pumping over left system on for a hour never seen that happen was three days between first visit thanks in...
bedspoolplayer
Thread
boiler
boiling
central heating system
cold
cylinder
hot
job
overflowing
pump
pumping over
system
tank
valve
vent
water
Hello, I have been to look at a system where the boiler seems to be ignoring the room stat,and going on getting hotter and hotter.Eventually the customer says she hears a strange noise from the boiler,maybe similar to a kettle boiling.
Does this sound as simple as a faulty room stat (honeywell)...
Hello all
I am currently having a system boiler and unvented indirect cylinder fitted. The access to the outside for the discharge pipe is difficult and involves lifting chipboard floors so the engineer wants to connect it to a soil stack (I think it's called) - the big pipe that the toilet...
Gromit
Thread
boiler
boiling
connect
cylinder
difficult
discharge
drain
hot
indirect
pipe
pipes
pressure
problem
regulations
safe
safety
soil
soil pipe
system
toilet
training
unvented
unvented cylinder
valve
water
work
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