Boiling hot water in immersion tank

ptyloch

Hi All,

I was just getting the bath ready for the kids, opened the hot tap which is supplied from the immersion tank behind the bathroom wall and the water was steaming hot. It looked like you could make tea with it. It was really, really hot to touch.

Is some temperature regulator gone or something? It just seems like this water is way too hot.

The water in the immersion is heated by a gas boiler downstairs, is there a safety valve on the immersion in case there is a build up of pressure inside (if I leave the heating on for extra long and the water will start to boil building up pressure inside)

Thanks, I hope someone can make sense out of this.

TheChizler

Have you got a thermometer you can check with? There should be a thermostat on the side of the cylinder that you can adjust.

ptyloch

TheChizler wrote: »

Have you got a thermometer you can check with? There should be a thermostat on the side of the cylinder that you can adjust.

Can't see a thermostat anywhere, I took some pics, maybe someone can see where it is?

brightspark

Problem isn't likely to be with the immersion(don't like the switch hanging in the pic though)

Are there zoned controls on the gas heating circuit?

Be aware that you cannot work on the gas boiler itself.

ptyloch

brightspark wrote: »

Problem isn't likely to be with the immersion(don't like the switch hanging in the pic though)

Are there zoned controls on the gas heating circuit?

Be aware that you cannot work on the gas boiler itself.

Ok, I think this warrants a morning call to the landlord and a request for a plumbers visit. I just want to be sure I'm not calling them for nothing, and it's not a matter of simple adjustment of a thermostat.

There are no controls other than a timer on the wall beside the gas boiler and one knob on the boiler itself, for temperature I think. That is set to roughly 75%.

TheChizler

ptyloch wrote: »

Can't see a thermostat anywhere, I took some pics, maybe someone can see where it is?

Nothing under the lagging jacket?

The_Chap

The thermostat is under the black cover, there is an adjuster there but it sounds like it is stuck, we had the same issue

Don't leave the immersion on too long as it will just boil itself and the pressure will release into your cold tank as steam

I'd say you are looking at replacing the thermostat

John T Carroll

The_Chap wrote: »

The thermostat is under the black cover, there is an adjuster there but it sounds like it is stuck, we had the same issue

Don't leave the immersion on too long as it will just boil itself and the pressure will release into your cold tank as steam

I'd say you are looking at replacing the thermostat

You might consider replacing the immersion itself as well as an added safety precaution, all immersions, as far as I know, must also have a hi level or overtemperature thermostat which is entirely independent of the normal adjustable stat, if the normal stat fails in the closed condition then the overtemperature stat switches out the power at around 95C and has to be manually reset either by pressing a reset button on the top cover or the cover may have to be removed, it obviously shouldnt be reset until the normal stat has been renewed. Yours may be old and does not contain this feature. Can you not just switch off the Immersion for the time being. This will also establish if the problem is in fact with the (electric) immersion and isnt the result of the cylinder being heated to 75C by your gas fired coil due to a failed (or not fitted) motorised valve.

gctest50

ptyloch wrote: »

Hi All,

I was just getting the bath ready for the kids, opened the hot tap which is supplied from the immersion tank behind the bathroom wall and the water was steaming hot. It looked like you could make tea with it. It was really, really hot to touch.
.........

You need anti-scald valves , just an extra layer of safety

23 people are killed every year by being immersed in hot water by mistake by a carer or nurse or by falling in to a bath and not being able to get out quickly enough.(in the UK)

this kinda yoke :

http://www.intatec.co.uk/document/37/inta-antiscald-booklet---summer-2011.pdf


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