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cylinder
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.
Fitted unvented hotwater cylinder building control looking forms signed it off job was in england i am qualified northern ireland send out a form to fill in what do u need to sign off in england as building control said they dont give out forms like they do in northern ireland
Hi,
I'm in my new build 2 years and the shower pump has died.
I have an air to water unit downstairs is in the utility which I've been told is unvented and pressurised. The cold water feed into this cylinder is from the attic tank, not the mains as I turned off the mains stopcock to see if hot...
Hi guys, just want to get advice, i want to replace venten to unvented cylinder, is it ok to install D2 pipe to toilet waste pipe see picture? as there is no easy options to get it outside.
Hi, I was hoping to replace an old system boiler with a Vaillant Ecotec Exclusive 627 system boiler, thats the one with the diverter valve so no need for zone valves, controling it with a V-Smart and a VR10. I've spoken to Vaillant Tech and they said you cannot use the VR10 with a vented...
Hi
There was no shut off valve on the tank feed to the hot water cylinder, and I needed to move a couple of hot water pipes, so I shut off the mains water, turned boiler off (Remeha avanta)
and opened the hot kitchen tap to drain the cylinder.
After doing the work etc, Everything up and...
What is/should be the switching differential in the above, installed in a Heatrae Sadia unvented HW Cylinder, set to 60C. Can't find anything in the spec sheet re this.
Hi all. This ‘valve’ is at the bottom of our domestic hot water cylinder.
Anyone have any idea what it is please? It must’ve been there for many years and seems to be leaking.
Good evening,
I'd like your opinion on something that is worrying me please: my landlady's plumber replaced the bottom/night element of my 20-year-old unvented cylinder (an Ariston Classico HE STD 150) 5 days ago and I hadn't noticed that it was leaking. He fixed the leak today but now the...
Hi
I recently did some pipe insulating in my loft.
The only two I didn't do were the vent pipes. Not sure if that is the right term for them? They are the pipes that feed water back into the top of the tanks when there is excess, presumably from steam, expansion, etc. The one going to the cold...
Hi all,
I have an OSO Direct 210 hit water cylinder installed in my home, with 2 switches (on/off; and boost). The boiler is for hot water only (rads are electric).
In the 5 years that I’ve lived at this property, I’ve never once turned the boiler off; however, with soaring energy prices, I’m...
Do most composite valves now for unvented cylinders have a tee on them For the expansion valve connection? The ones I used to fit just had the balanced cold connection coming of it. Them I tee'd off downstream of the composite valve for the expansion
Hi my daughters Ariston Cylinder has started to leak around the Emersion heater. She has never used the emersion heater so I was wondering if there was anyway to take it our and fil the hole with a blank? Or if anyone knows where to find an Ariston cylinder 150L unvented??
Hi
We urgently need to get our h/w cylinder replaced because it's leaking. Our current system is oil boiler feeding underfloor downstairs, radiators upstairs and an unvented hot water cylinder for hot water. We are thinking of moving to a heat pump at some point but aren't ready to do this. My...
I need to change my shower mixer and I have a unvented hot water cylinder. Is it sufficient to turn off the mains? Do I need to drain the cylinder?
Thanks
Hi, hope someone can help with this.
My central heating system has a Worcester gas combi boiler, paired with a nest thermostat and a megaflo cylinder.
When the boiler starts in the morning, the radiators start to warm up ok, but this is accompanied by a loud whining of the pipes attached to the...
Does anyone know of a weather compensation unit that can be fitted to a cylinder? I have an Ideal Logic Max H24 which heats a thermal store. The boiler can take an Ideal weather compensation unit to raise the target flow temperature as the outside temperature drops, but the store temperature...
Hi all
I'm blanking a couple of openings in a hot water cylinder.
The Screwfix Flomasta 1" BSP plugs fit perfectly but no washer supplied or listed.
Given that the element has a washer and everything else is a compression fitting I'm concerned these should have one. The alternative is PTFE...
I have a vented hot-water cylinder that was installed when the house was built - 38 years ago! It has a header tank in the loft and the cylinder is located directly above the ceiling of a new and expensive kitchen. It does not leak and causes no obvious problems. Should it be replaced?
Advice...
My heating system comprises an Ideal Logic 12 boiler located downstairs and a Gledhill OV SOL cylinder located upstairs . The problem is that when the Gledhill controls for the “hot water” and “central heading” are turned on the Ideal boiler makes a constant “clicking” noise and tries to start...
I was told by the plumber to keep an eye on the pressure, to ensure it stays above 1.0.
The red one is… but the black one is not…. What do the two mean?
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