There are a number of reasons why your unvented system is not functioning correctly and a competent registered G3 engineer should be able to resolve the problem(s) so please follow the previous advice and get it looked at by a G3 certificated plumber.
Unvented hot water storage systems are...
The Rubi kit from screw fix is pretty good...don't try using the drill adaptor.. put them on the M14 thread on your grinder... start your holes at 45 degrees and don't force the bit or it will burn out. If I'm drilling more than 1 or 2 holes then I cost a set into the job to allow for
fixing...
If you are covered for hot water and heating call your provider and tell them to send a G3 qualified engineer. If the system has been correctly installed then water discharging through the tundish indicates a fault/failure of one or more safety components. A G3 qualified engineer should have no...
Fit the fill valve into the cistern and before you put the plastic nut on and tighten it run a bead of clear silicone into the gap between the hole in the cistern and the thread of the fill valve. Fit the plastic nut and tighten sufficiently to compress the washer at the base of the fill valve...
Your original post asked whether as an unqualified DIY'er you could replace a blown immersion element on an unvented cylinder...The overwhelming response was NO and you were advised to have the work done by a G3 qualified engineer..You've confirmed the element has failed, told us how much you...
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