Unvented cylinder cost
Discussion
My plumbers imploded a solar thermal HWC on mine when they drained the system without opening a tap to let air in (thread on here about 5 years ago).
We compromised (because of course some how this was my fault) that I would pay for the parts to replace and he would do his own labour at no cost.
I paid just under £1000 for the Vaillant tank (big unit too) and all the bits.
Can’t really see where your guy is getting £1600 in additional parts…an expansion tank, a PRV, a few isolators and a bit of 22mm pipe even if you’re going all new. The glycol to refill the solar thermal system isn’t that expensive.
We compromised (because of course some how this was my fault) that I would pay for the parts to replace and he would do his own labour at no cost.
I paid just under £1000 for the Vaillant tank (big unit too) and all the bits.
Can’t really see where your guy is getting £1600 in additional parts…an expansion tank, a PRV, a few isolators and a bit of 22mm pipe even if you’re going all new. The glycol to refill the solar thermal system isn’t that expensive.
They also identified a bunch of remedial work to the solar system and the PRV drain gubbins which, given that I know who installed it all, is highly plausible.
We have negotiated a (relatively) agreeable price given I have two annoyed women facing a fortnight of cold showers to deal with
We have negotiated a (relatively) agreeable price given I have two annoyed women facing a fortnight of cold showers to deal with

When you say dead - properly dead how?
It’s a cylinder filled with water - has cold mains in and heated water leaves it when you run a tap - if the solar doesn’t work presumably there is an immersion back up or a boiler facility to heat an internal coil
Unless it has a massive leak or has been drained down without venting and it’s imploded I’m struggling to think how it could be properly dead
It’s a cylinder filled with water - has cold mains in and heated water leaves it when you run a tap - if the solar doesn’t work presumably there is an immersion back up or a boiler facility to heat an internal coil
Unless it has a massive leak or has been drained down without venting and it’s imploded I’m struggling to think how it could be properly dead
miniman said:
B'stard Child said:
Plumber was not prepared to reconnect and refill it (the top gave way when cutting the outlet pipe to hook up a connection to new shower). Listen to what your plumber tells you.
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