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asked 2 weeks ago by Anonymous
updated 2 weeks ago by Anonymous
My unvented cylinder is only 8 years old but I'm being told it needs replacing. How do I know whether it really needs replacing or whether one of the valves or other components is faulty?
Admin 16/09/2026 23:51
An 8-year-old unvented cylinder doesn't automatically need replacing. A well-maintained stainless-steel cylinder can often last considerably longer than this, so it's worth finding out exactly (more)
asked 2 weeks ago by Oliver
updated 2 weeks ago by Oliver
The gauge under the red expansion vessel keeps going to zero after its repressured. It only lasts for a few days
Admin 16/09/2026 23:50
If the pressure gauge on your unvented cylinder keeps dropping back to zero within a few days of being repressurised, there is almost certainly an (more)
asked 1 month ago by Michelle
updated 1 month ago by Michelle
What is a combination valve and are they expensive to replace? I have been told I need a new one.
Admin 26/08/2026 21:06
A combination valve is an important component on many unvented hot water cylinders. It normally combines several functions into one valve assembly, including pressure reduction, (more)
asked 1 month ago by Paul K
updated 1 month ago by Paul K
My electric bill is too high and I am trying to save money
Admin 12/08/2026 10:11
For a typical domestic hot-water cylinder, the thermostat should generally be set to around 60°C. This is a good balance between having sufficiently hot water (more)
asked 2 months ago by Admin
updated 2 months ago by Admin
I was told the tpr might be dripping, what is this?
Admin 06/08/2026 15:00
A TPR valve (Temperature and Pressure Relief valve) is the final safety device fitted to an unvented hot water cylinder. Its purpose is to prevent (more)
asked 2 months ago by Claire
updated 2 months ago by Claire
Admin 03/08/2026 16:14
A tundish is a small safety device fitted to the discharge pipe of an unvented hot water cylinder. It is usually made from clear plastic (more)
asked 2 months ago by MP
updated 2 months ago by MP
I have been told I need a thermal store, but its really expensive compared to other cylinders
Admin 01/08/2026 17:57
Although they look similar, a thermal store and an unvented hot water cylinder work in very different ways. An unvented cylinder stores the hot water (more)
asked 2 months ago by Olivia
updated 2 months ago by Olivia
My electric bill is really high, my friend says that leaving the immersion heater on all the time saves money as the cylinder doesn't have to keep reheating from cold. Is this true?
Admin 01/08/2026 14:31
In most cases, no. Leaving an immersion heater on all the time is usually more expensive than heating the water only when you need it. (more)
asked 2 months ago by Eve
updated 2 months ago by Eve
unvented water heater is only producing tepid water and the boost lights won't turn on. Require a provider in South West/ Somerset to fix it! Any contacts?
Admin 31/07/2026 15:26
If the boost lights won’t come on at all, I’d start by checking the electrical supply before assuming it’s a cylinder fault. It could be (more)
asked 2 months ago by Anonymous
updated 1 month ago by Anonymous
Admin 26/08/2026 21:11
A good quality immersion heater fitted to an unvented stainless steel hot water cylinder will typically last 5 years though many last a lot longer, (more)
