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check valve
A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, and inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.
An important concept in check valves is the cracking pressure which is the minimum differential upstream pressure between inlet and outlet at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.
i need a 28mm featherweight check valve for my woodburner flow to stop back circulation. where can i buy one. i cant seem to find one anywhere.
any help much appreciated
mark
My friend has had a radiator removed around 6 years ago from the dining room, apparently the pipes were cut and capped off inside a wall. she now wants the radiator put back and has asked me to take a look at it. the pipes are going to be full of crap arnt they?:D
that bloke.
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adding
checkvalve
combi
flow
flush
flushing
inside
main
mains
micro
pipe
pipes
power
radiator
sludge
system
valve
wall
water
work
looking for some advice before I decide how to get this resolved.
We had an extension added to our house last year, and one of the main things we requested up front was a garden tap. Towards the end of the job, we noticed it wasn't there, so asked again for it to be put in. The result is, we...
Celia Newlands
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bits
bleed
checkvalve
cold
drain
fitting
frozen
inside
insulation
job
kitchen
outside tap
pipe
screw
sink
tap
taps
valvevalves
wall
water
weather
just been round a friends house to replace a kitchen tap , no drain off valve on hot or cold anywhere in the house, looked at the feed for the out side tap and it had no stopcock or check valve , just straight into the mains.
apparently all the plumbing was done by a very well established...
that bloke.
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checkvalve
cold
drain
drain down
find
fitting
funny
heating
hose
hot
job
kitchen
leak
mains
monobloc
plumbing
stop cock
system
tap
taps
valvevalves
wall
water
work
This is my dilemma, I have a macerator with all inlets on the left hand side (my client purchsed of ebay and can't send it back) and makes it very hard to get all 3 wastes to the left hand side of the macerator. WC and shower are fine, its just the basin - very tight bathroom.
Is it possible...
Hi all,
This might be really obvious but would appreciate your thoughts. Over the last few weeks I have noticed an increase in pressure on the primary circuit of my Halstead Finest. Reset a week ago and still increasing about half bar/week. I'm assuming that the likely candidate is the filler...
Thesub
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bar
boiler
central heating system
checkvalve
cold
dhw
filling loop
flexible
halstead
hose
increase
pressure
primary
remove
reset
safe
safety
system
tap
valvevalves
water
work
Hey just looked at a shower steam unit there and looking for any advice from people that have done it before, usual hot+cold manifold (pump added because pressure is grim atm) however i want to take the steam unit off from the mains just to prevent any lapse in pressure or too much from the pump...
Twinhawk
Thread
advice
checkvalve
cold
damage
enclosure
free
hot
mains
plumbing
pressure
pump
shower
shower enclosure
steam
type a
valve
hi Guys
i have hust had this new unit installed...and any time the cold tap or washing machine or dishwater takes cold water and stops ...the hot water side of the boiler starts up...it stays on for about 30 secs then switches off
im worried because with the dishwater and washer on at the same...
JOHNNIE7
Thread
boiler
checkvalve
cold
cold water
combi
gravity
hot
hot water
pipe
pressure
problem
tap
turned
valve
vent
vokera
washer
water
water tap
Hi,
I'll be installing a (vented) buffer cylinder above a woodburner and will have a 28mm connecting copper pipe for the convective heat transfer. The vertical distance is about 3m. Two questions: Is it best for the connecting pipe to enter at the top or bottom of the buffer cylinder? (I think...
jbolland
Thread
28mm
between
boiler
checkvalve
circulation
connection
copper
cylinder
gravity
oil
pipe
pumps
storage
tank
travel
valve
vertical
Hi I got called by a customer today to try and fix low water pressure on his hot water bath tap (its a shower mixer type fed from a water cylinder). All the pipework looked ok to me. So I disconnected the flexi pipe connected to the tap. I checked the pressure going in and the pressure seems ok...
bath
cause
cheap
checkvalve
cold
cold water
cylinder
faulty
fix
hose
hot
hot water
low water pressure
mixer
pressure
problem
shower
shower mixer
tap
valvevalves
water
water pressure
work
Help!
A customer of mine has the following problem:
The shower pump in the loft comes on, just for an instant, when any of the hot taps in the house are turned off.
It's a vented hot water tank system using a Warwick flange and now with a check valve / non return valve just after the hot...
Brooksie1963
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checkvalve
flange
hot
hot water
loft
pipe
problem
pump
shower
shower pump
switch
system
tank
tap
taps
tee
turned
valve
water
hi,When I click on Whats New,New Posts,Tiling,I get the dreaded Internet Explorer cannot open the site.Operation aborted.I have googled for possible solutions to this but quite honestly I don't have a clue about what they want me to do as possible solutions.Help!!!!!!
Hi,
I have a Vokera Linea combi boiler.
Every half hour or so it fires up for about 30 seconds.
Also, it fires up when I turn the cold tap on!
Ideas appreciated.
Thanks.
Russ
Russ649
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air
bleeding
boiler
boilers
checkvalve
cold
combi
combi boiler
cylinder
every
flow
hot
hot water
linea
pipes
pressure
problem
switch
switches
tap
taps
valve
vokera
water
There is air getting in a customers system and I can't figure out what it could be. He has to bleed rads once every week or two.
They called a plumber ages ago and he seems to have fitted a check valve?! on the open vent pipe and he seemed to think this would cure it. Customer says still same...
mrlennie
Thread
air
bleed
checkvalve
cold
combi
flow
heating
hose
pipe
pipes
plumber
problem
pump
system
valve
vent
water
We've moved into this house last month and for the first week we were able to drink the cold water from the kitchen tap no problem and we used the washing machine to the left of the kitchen sink that the previous owner left.
Then my new Hotpoint washing machine and dishwasher arrived from...
KLT
Thread
advice
checkvalve
cold
cold water
dishwasher
flow
flushing
hot
hot water
install
kitchen
law
needed
pipes
plumbers
plumbing
problem
remove
sink
tap
test
toilet
valve
washer
waste
water
Hi everyone,
New to this forum but really could do with some advice........
Just had new bathroom fitted. Bath has been moved lengthways so tap end is now on the opposite wall to where is was before.
We have had a Tavistock Cruz bath shower mixer fitted. Initially, the diverter valve...
Shibees
Thread
bar
bath
checkvalve
cold
copper
fix
flow
gravity
help
hot
mains
mixer
overflow
pipes
plumber
pressure
problem
shower
shower mixer
tank
tap
taps
valve
water
work
hi
my hot waters cylinder (pressurized) has started making a noise when my washing machine is spinning,it sounds like the cylinder is contracting and then expanding.as if someone is pushing it in then letting go.I have reasonable plumbing knowledge but not on pressurized cylinders,,what i...
big craw
Thread
air
checkvalve
cleaning
cold
cylinder
element
expansion
filter
hot
hot water
hot water cylinder
making
no water
noise
plumbing
pump
valve
water
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