Unvented hot water cylinder problems

Unvented Hot Water Cylinder Problems And Cures

In this months blog we're talking about unvented hot water cylinders and the common problems we come across as Emergency Plumbers in MIlton Keynes. It is important that only qualified engineers carry out work on these systems, illegal work can come with large fines and prosecution from the HSE. Don't cut corners!




Why am I getting no hot water from my unvented hot water cylinder


If your not getting any hot water from your unvented hot water cylinder, then this is most likely going to be due to the immersion heater that is faulty, you may need the complete immersion heater replacing or just a stat.


Why am I getting no water from my unvented hot water cylinder


If your getting no cold or hot water at all via the hot water tap, then this will most likely be due to the filter being blocked up.



My water is too hot on my unvented cylinder, why is this?


If you have water that is getting too hot, it may be because the stat is set too high instead of 60 to 65° or the stat has become faulty and needs replacing.



There is water dripping from the plastic pipe, do I have a problem?


If you have water dripping from the D1 to D2 pipe via the Tundish which is the overflow pipe the runs from the unvented cylinder to the water waste and to the outside. Then you have a problem, in most cases, illegal fitters tend to think it’s the PRV at fault but it isn’t. A qualified engineer will be able to diagnose the problem.



I can see water pouring through my pipe of my unvented hot water cylinder, what can I do?


If you see water coming through the Tundish of the plastic overflow pipe, then the first thing to do is to turn the electric off to it and then the mains water afterwards. Do not attempt to fix it yourself and call a qualified engineer.



Do I have to get my unvented cylinder serviced annually?

It's not a legal requirement to have you cylinder serviced annually, however most manufacturers will require you have had the cylinder, pipework and safety devices checked to to keep it within the warranty. Most home insurances will also require you have it checked annually, so keep this in mind.


If your still having unvented hot water problems in Milton Keynes, you can call our office on 0333 5778 247. Before any engineers caries out work on your unvented system ask to see their i.d card with their qualification. If they cannot provide this do not let them carry out any work on your system. Watch the video below when an unvented cylinder explodes.


Receive £10 off your annual unvented hot water cylinder service when quoting "November Blog"