How to tell the type of hot water cylinder in my home

Question

How can I tell if my hot water cylinder is vented or unvented? I also have a boiler but I'm confused about how or if they work together. I've just moved into a new house and it's not what I'm used to.

Paul · Answer

Basically if you’re cylinder has a big tank above it then it’s open vented , same with the boiler that would have a smaller header tank, however there are also many variations out there such has primatic, heat store’s cylinders , contact a plumber/ heating engineer to have a look

Mihai-vasile · Answer

Hi, if you have a big plastic thank in the loft, and if it is functional, you have most likely an vented hot water cylinder. You can also tell that if your cylinder is covered by red or black sheets of insulation that you can remove, or it has foam stick on to it usually yellow, green or blue.
If your cylinder has no pipes going into the loft, and usually is white plastic covered un removable  it’s an unvented cylinder. This works with no thank in the loft.
Any cylinder you have, is getting heated by the boiler at certain times given by the programmer and certain temperature monitored by the cylinder stat attached to the cylinder.
Hope that helps.

Kevin · Answer

A vented cylinder is a simpler set up with a cold water tank in loft, plus a small header tank for heating if indirect heating. An unvented cylinder has an expansion vessel with extra safety devices as cold water is fed directly of the cold water main.
These require more maintenance but give greater hot water flow rates.

Laura · Answer

If it is a relatively new build it will no doubt be unvented - these are typically (but not always) white in colour with a pressure gauge close by and there won't be a pipe going into the loft. Vented cylinders are copper or stainless steel with an insulation jacket or foam on them, and are fed from a tank in the loft or on top of the cylinder. Unvented cylinders are high recovery and provide much better water pressure as they are mains fed.

Kenneth · Answer

Send a picture to a qualified plumber  and he can tell you what it is

Muhammad · Answer

Hi for the vented system you have a header tank in loft also you don't need to fill the system its filling by header tank and for unvented you don't got any header tank also there is feeling loop to fill the system

Chas · Answer

If unvented it will have gauges, expansion vessel blowoff pipe with tundish and pressure reducing valve and balance if vented it will have pipe from top branching off and going up to tank in loft some u 
 vented normally in flats  have tank and cylinder in one with supply coming from top of tank

How to tell the type of hot water cylinder in my home

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