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bar
The bar is a metric unit of pressure, but not part of the International System of Units (SI). It is defined as exactly equal to 100,000 Pa (100 kPa), or slightly less than the current average atmospheric pressure on Earth at sea level (approximately 1.013 bar). By the barometric formula, 1 bar is roughly the atmospheric pressure on Earth at an altitude of 111 metres at 15 °C.
The bar and the millibar were introduced by the Norwegian meteorologist Vilhelm Bjerknes, who was a founder of the modern practice of weather forecasting.The International Bureau of Weights and Measures (BIPM) lists the bar as one of the "non-SI units [that authors] should have the freedom to use", but has declined to include it among the "non-SI units accepted for use with the SI". The bar has been legally recognised in countries of the European Union since 2004. The US National Institute of Standards and Technology (NIST) deprecates its use except for "limited use in meteorology" and lists it as one of several units that "must not be introduced in fields where they are not presently used". The International Astronomical Union (IAU) also lists it under "Non-SI units and symbols whose continued use is deprecated".Units derived from the bar include the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar).
Hi there,
trying to help a mate out who has problems with his controls.
Basically, whenever he turns the water off on the control unit, he has to push the control right in to stop the water flowing out of the unit.
Spoken with Aqalisa, who say I need a new valve unit, which is fine.
My...
Pritch
Thread
aqualisa
bar
cold
control
heating
hot
shower
thermostat
thermostatic
valve
valves
water
I am installing a bar shower this week on a gravity system.
I am using the hot connection of the top of the cylinder for the hot feed to the shower but for the cold I have the option of mws or cws from the tank for the cold connection for the shower.
Would it be best to use the cws to get...
Hi have I have a 3 bar pressure releif valve underneath a boiler which is letting by. I changed this valve about 3 months ago but have been called back to the job to find the Prv valve is letting by again. I changed the valve and it stoped letting by. However I have been called back again to...
I got called to a house today the homeowner has done a diy job themselves.
They have installed a thermostatic bar shower to a standard gravity system.
There is obviously now very little pressure.
What is the best way to rectify this.
The shower and pipes our fully tiled in and is a...
richardd
Thread
bar
cold
connected
gravity
heating
hot
shower
system
thermostat
thermostatic
Hi,
I recently bought a house which is split into two self contained flats.
The first floor flat has a hot water heating system and a separate boiler for heating. Ive been told this system is very old and probably wont cope with increased modern day demands on water requirements from...
ripsoco
Thread
bar
combi
conventional
floor
heater
mains
shower
single
water
water heater
Hi everyone,
My hot water and central heating stopped working three days ago. Given the recent weather I thought it might be related to frozen pipes and assumed it would thaw out naturally within a couple of days. Today I looked at the boiler and noticed that the pressure guage reading was at...
serpico
Thread
bar
boiler
central heating system
filling
help
oil
outside
pressure
valves
water
I had an issue with frozen pipes for the CH the last few days. Repaired a burst outside pipe and re-insulated it which seems to have thawed the freeze.
However the pressure gauge on my boiler which normally reads just under 1 bar is now at it's max, 4 bar!!! Should I turn on the CH with the...
As I value other's opinions (allmost as much as my own lol), thought I'd ask you all what you think of CIPHE?
shorticus
Thread
apprenticeship
bar
bodies
ciphe
corgi
costs
gas
gas safe
heating
high
membership
oftec
plumber
plumbers
plumbing
problem
public
safe
store
thank you
trade
wanted
waste
water
web
website
work
Has anyone any experience of these boilers. Is there a common failure for the fault code 04 (insufficent water pressure). The boiler was pressurised yesterday and worked fine all day. The went off showing code 04. There are no leaks to cause the loss in pressure.
Hi All, First post on the forum and hope its a good'n !
Story goes like this....
I salavaged a number of Ideal standard 4 column cast iron rads from a warehouse a few years ago, brought them home, removed all the old fittings, flushed em out with a hose in the back yard till water ran clear...
RonG
Thread
bar
bottom
cast iron
central heating system
cold
cold radiator
connect
cool
ecomax
efficiency
flow
hose
hot
hot rads
hot water
ideal
iron
kitchen
lukewarm
old
pipe
pipework
piping
problem
radiator
style
system
trv
valve
valves
water
wide
hi i fitted a new bath tap (1 to 5 bar) but only have low pressure (no head hieght)
could i fit a shower pump to boost it, h/w comes from a cylinder on the same floor
hi all,
ive come accross a couple of glow worm cxi's which have been buggers to fill up using the filling loop. one would only go up to 0.8 bar (the mains was 2.5 bar so no idea there) and the other was already at 0.7 bar but would not fill at all. now it does state in the glow worm manuals...
Hi all,
I'm trying to find out why an unvented microbore system isn't working as it should. The boiler works fine but when I got to it this morning the system pressure was at zero bar. I filled it up to the working pressure, turned on all TRVs and lockshield valves and bled the system fully...
bar
blockage
boiler
central heating system
cold
flow
hot
hot water
lockshield
lukewarm
microbore
not working
pipes
pressure
problem
properly
pump
stuck
system
unvented
valves
water
working
working pressure
Any help would be greatful beening a cold water plumber ie not gas, i have a problem with my own boilder showing code E119 low water pressure: The thing is that the guage is reading between 1 and 2 bar so thats fine, have empted water from rads just to see if the guage falls, and then refilled...
andymanila
Thread
bar
baxi
boiler
code
cold
cold water
combi
drain
error
error code
gas
guage
leak
low water pressure
mains
manual
plumber
pressure
problem
range
screw
sensor
system
water
water pressure
We have moved into our current home a few months ago. It's a very old house with relatively haphazard plumbing. Things worked fine until recently when I noticed that the pressure in the sealed system is on 0.5bar and it's not heating the upstairs radiators.
Got a plumber that had done some work...
ashimashi
Thread
bar
boiler
central
central heating system
combi
filling loop
heating system
leak
mains
not heating
pipe
plumber
plumbing
pressure
problem
pump
radiators
screw
sealed
system
valve
water
I have underfloor heating to all of my rooms split into 7 zones.
About a year ago I had a leak which manifested itself in a drop in pressure (running at 1 bar). i was able to find and repair the leak by a process of elimination on each zone.
About 4 days ago I noticed that the pressure within...
quord
Thread
bar
boiler
ceiling
central heating system
leak
pipes
pressure
problem
pump
single
system
ufh
under floor heating
underfloor
underfloor heating
water
zones
hi another newbie, about to join the worcester 24i thread which is describing my issues to a T !!
Many thanks in advance and anticipation for all advice which will be gratefully received :)
Michelle
mc55
Thread
24i
bar
boiler
boilers
condensate
drain
evening
gas
newbie
pipe
pipes
pressure
rodding
soil
stainless
system
test
vaillant
waste
waste pipe
water
worcester
With a sealed combi system obviously the heating system is filled up via the filling loop to a certain pressure, so when it comes to bleeding the radiators then pressure will obviously drop and need filling, am i right so far? Its an old worcester 24i combi boiler, ive searched for what pressure...
peteeyres
Thread
24i
bar
bath
bleed
bleeding
boiler
central heating system
cold
combi
combi boiler
drain
filling loop
pressure
problem
question
radiators
sealed
silly
switch
system
valve
worcester
Quick question, The pressure build to over 3 bar when heating is switched on so presumably the Vessel has gone
Where is the vessel situated on one of these and are they a nightmare to do?
BEXI 80ECO
47-075-05
Thanks for any advice
hicliner
Thread
bar
baxi
eco
expansion
expansion vessel
heating
pressure
vessel
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