Are unvented water cylinders safe?

Unvented cylinders are designed to withstand considerable internal forces and are extremely safe to use when fitted with all the correct pressure equipment. They are usually made from stainless steel due to the high tensile strength that can be achieved from a fairly thin sheet.

Can a hot water cylinder explode?

While rare, residential water heater explosions do occur and can be deadly. Explosions are possible with both gas and electric tank water heaters, primarily those that are poorly maintained.

How does a water cylinder explode?

Anything that causes excess pressure on your water heating system, such as a poor anode rod, or a lot of sediment buildup, can all cause your water heater to explode. A gas leak can also cause your water heater to explode because it is a tremendous fire risk.

How long do unvented cylinders Last?

And because they are so simple, the average length you can expect your unvented cylinder guarantee to last for is 25 years. Although you can usually expect a guarantee to cover you for 25 years, there is one company called Santon which actually offers a 30-year guarantee.

Do unvented cylinders need servicing?

The simple answer here is “yes”. You should have your unvented water cylinder inspected and serviced every year. The reason for this is that unvented cylinders, while offering better performance and reliability than vented cylinders, do have inherent risks. They are pressurised metal cylinders.

Why do unvented cylinders explode?

An uncontrolled/uncontrollable heat source putting heat into a sealed system, without any means of removing the heat or releasing the pressure will eventually result in a bang-type pressure release. Domestic cylinder explosions in the UK have mostly been vented types (frozen, blocked OV, incorrectly installed).

Are Gledhill unvented cylinders any good?

Gledhill. The StainlessLite Plus Indirect by Gledhill is a highly efficient unvented cylinder that’s available in a range of capacities to suit various property types. The Stainless Lite Plus cylinder is the lightest on the market.

How much does it cost to service an unvented cylinder?

We charge a fixed price of £95+VAT to carry out a service of an unvented hot water cylinder or Megaflo.

Are GledHill cylinders any good?

Best overall value unvented cylinder: GledHill My top pick for the best overall value unvented cylinder is without a doubt, Gledhill. They’re manufactured in The UK which is a huge plus as I can always get hold of them when needed, and they also have a great guarantee.

How much does it cost to service a cylinder?

Silver Saints will send you a qualified unvented cylinder engineer to carry out an annual service to your unvented hot water cylinder or Megaflo. We charge a fixed price of £95+VAT to carry out a service of an unvented hot water cylinder or Megaflo.

How much does an unvented cylinder cost?

Unvented Cylinder Replacement A cylinder could cost anywhere from £500-1000 and costs associated with labour will be £275-450 depending on the ease of the install.

Can a unvented cylinder cause an ocasional explosion?

Something like that happened in the case of the Fleur-de-Lys, a UK fishing boat sunk by an exploding cylinder, in that case a domestic vented cylinder installed without a vent. There are ocasional explosions, most of those I’ve heard of were in the US where unvented systems are common.

What’s the difference between a vented and unvented cylinder?

With a vented cylinder, you rely on the water being gravity fed from within the property, where with an unvented cylinder, you are relying on the water pressure from the mains water pressure and flow.

Can you have an unvented cylinder with poor water pressure?

If you have poor water pressure, then you will be unable to have an unvented cylinder unless you can find means of a way of getting better water pressure. To find out if you have good enough water pressure and flow, you will need a Weir gauge and a pressure gauge.

Why are unvented cylinders sealed from the atmosphere?

Because the unvented cylinder is ‘sealed from the atmosphere’, the hot water temperature, water expansion and water pressure have to be monitored and accommodated (taken up safely) in normal operation, and, in the event of a problem, be capable of discharging any excess pressure and hot water safely.