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cylinders
A cylinder (from Greek: κύλινδρος, romanized: kulindros, lit. 'roller', 'tumbler') has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. Geometrically, it can be considered as a prism with a circle as its base.
This traditional view is still used in elementary treatments of geometry, but the advanced mathematical viewpoint has shifted to the infinite curvilinear surface and this is how a cylinder is now defined in various modern branches of geometry and topology.
The shift in the basic meaning (solid versus surface) has created some ambiguity with terminology. It is generally hoped that context makes the meaning clear. Both points of view are typically presented and distinguished by referring to solid cylinders and cylindrical surfaces, but in the literature the unadorned term cylinder could refer to either of these or to an even more specialized object, the right circular cylinder.
Hello!
I'm planning to replace my bathtub mixer, but obviously need to shut off the water before I begin. There are no valves for the hot/cold water pipes in the bathroom.
The problem: I'm in an apartment and my water tank is old (circa late 80s/early 90s). I can't figure out what needs to be...
Hi again.
Exploring options for my bro's flat. One is to convert to a pressurised system.
The preferred location for the new unvented cylinder would be where the current vented one is in his airing cupboard. Problem is, it would be tricky to get a gravity drain from this to the outside (he had...
Hi all,
Not sure if I'm posting in the right place but i have a problem with a new house with 2 hot water cylinders. It is a gravity fed oil fired system and the boiler, heating and one of the cylinders is fine, however the second newer(ish) cylinder installed when the previous owner extended...
simple question but answer not easy to find......
I do not have the unvented qual but what are you actually allowed to work on without the qual. My company thinks that anything apart from the vessel and prv on the vessel cannot be touched but everything else is ok???
hey all,
Looking for a qualified gas engineer to install a new unvented heating system that comprises:
2 x rm 300 indirect unvented cylinders or preferably ACV same size.
2 x vaillant system boilers giving a total of 60kw
Low loss header.
Suitable sized main heating pump
Mixing valve to give...
n141311
Thread
boiler
boilers
cylinders
engineer
gas
gas engineer
install
oil
unvented
wanted
yorkshire
Hi guys i usually i install cylinders .but today i went out and to leaking immersion .which i have to change .but my question is the pressure relief isnt to current regs as it runs upwards and downwards beforw gets to tundish ....do i legally have to change it or just adise customer thats its...
Anyone got any views on whether a DHW cylinder having an internal expansion 'bubble' e.g. TribuneXe is better or worse than having a cylinder with an external expansion tank e.g RM Prestel. It strikes me that if there is air in the new water entering the cylinder, it will rise up to the...
Hi, I moved into a new build house few months ago, there have was a problem of radiators going hot whenever hot water was heated up in hot water cylinders. After months of visits, this has been solved by installation of valves under floor which stopped the problem, it took about 10 visits...
cattlady
Thread
always
boiler
cylinders
hot
hot water
oil
pump
running
water
Have 2m height and require a 500L unvented cylinder. Most will be just under this height so probably best if I go for a horizontal so it's not too tight.
Question is, is there an unvented cylinder with solar (future proof if I install solar), indirect (heated by gas boiler), horizontal and 500L?
DesDixon
Thread
cylinder
cylinders
height
horizontal
solar
unvented
unvented cylinder
Hi all just wondering what people are charging these days to service unvented cylinders? May have one to do for a management company of retirement apartments so want to give them a price? Cheers
baldyb220
Thread
charging
cylinders
price
service
servicing
that's
unvented
Hi Guys,
Quick question, can anyone recommend a good manufacturer of a slimline direct unvented cylinder the space I have is about 540 but obviously needs to be smaller than this to get pipework around it. I normally use vaillant cylinders cus I like the design but they don't make one that's...
Hello, Im new to this forum and have a query for you all.
Firstly, I am not G3 trained. I am fully aware of the legislation involved and have worked with G3 qualified plumbers on un-vented in the past. (Its on my list, as I'm currently doing my CCN1, etc)
Secondly, I am not installing any of...
HI
We're buying a house and planning to put in a 2nd bathroom. The only issue is that the bathrooms will be at opposite ends of the house, with the existing HW cylinder directly above the existing bathroom.
The obvious solution is to simply run pipework from the existing setup to the new...
Fitted a few different ones
Telford tempest
Main
Worcesters
Gledhill
Not really sure which ones I prefer, tbh the main was pritty good and reasonable prices but wondering what other
People's personal choice is :)
We had such fun yesterday with the Magnacleanses, that we thought we would play another game or two tonight.
The product is a pair (count 'em, one, two!) of RM Prostel Advantage 210 litre indirect unvented cylinders. We have a limited number, but we aren't saying what that number is. :)
This...
125 Litre Direct Unvented Telford Tempest - cylinders2go
Anyone ordered a cylinder from Trevor
Whats the story? Their price seems very reasonable - too good to be true
Hi Guys
Im sorry to say I have strayed from the flock and have left the great profession of plumbing and am now running a company in the hire industry, its the same $h!t but a without a drain to pump it in to
We have been asked to supply our existing LPG shower blocks for an indoor job in...
StuWalker
Thread
calculations
cylinders
help
help required
required
valves
water
which
Im just in the process of installing 2 300 litre unvented cylinders in a large job am a bit unsure about the secondary return. Do I tee out the pump to both returns or just one ?
I've got a job to price for an unvented hot water cylinder, I have taken water pressures as follows
Standing 4bar
Dynamic 0.5-0.8
flow rate of 22ltr/m
The incoming main is 25mm mdpe.
I know most manufacturers recommend a dynamic pressure of 1.5 bar, what do you guys think?
Thanks
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