Unvented Mains Pressure Systems (AKA Heatstores)

[clockmanFR]

Solal,
I have now fitted about 6 French systems, (wife's houses) all are closed systems, where a closed circuit is concerned then there is the red balloon expansion vessel but this is used as a separate pressurization system as well. Sorry to say i have not yet seen a proper installation manual just a sheet of A4 with installation instructions printed both sides.

Okay as i originally said the more limescale the more it leaks as the needle clogs.

When you install a French tank you must also install a 32mm or 40mm drain waste this is for the valve. You can manually override by twisting the knob and this allows the tank to be drained.
 
French tanks have internal tank that is heavily insulated then the whole lot is covered in a steel enamelled outer covering that have anchor points attached, for fixing to a wall and a special cradle for it to sit on. The heating element is air type, that is inserted into a formed recess within the base, so you can remove the element assembly without draining down.  

Pic 1, Cold feed and pressure release stem, the knob is the manual override for draining down, the green pipe is the drain away pipe this goes to the cellar drain, yes its normal to fit these tanks in the cellar.

Pic 2, New replacement valve and New pressure regulation valve, i have to much pressure about 6 bar, hence my other leaking continuously. The 3kw ceramic heating element.

[asorton]

asorton,

I stated the facts as they are here in France.
 
I think you need to actually see a French system, before jumping to spurious conclusions, it is nothing like the English rubbish.

I have fitted English in UK but the French stuff is something else and designed for rough and tumble. I like working with the French stuff where copper pipe is 0.5mm wall and comes annealed, all joints have to be brazed/silversolder because most water pressure is around 5 bar and soft solder is a no no.



 

All well and good but you are giving advice to people in the UK and that should not be based on French systems unless you are making it clear you are stating facts and not giving advice.

I don't need to see French systems, I have an unvented ticket and install unvented in the UK to UK standards and stand by what I said, giving the kind of advice you have given to UK home owners is irresponsible.

[clockmanFR]

asorton,
My original comment was, "I have noticed this last few months that the European hot cylinders are starting to make inroads into the UK."

The French web site i pointed at, is owned by the UK Kingfisher Group who I believe own B&Q and Screwfix, and these French systems may/will begin to appear in the UK at some time.

If you think that I am irresponsible, then fair enough. But do remember there is a bigger world out their with many possibilities. Scary.

Having a bit of paper and telling me off, oh dear.

[asorton]

Oh dear Clockman you really do need to be more careful what you write if you think thats all you said.

Your post were very clear in saying you felt it was fine to overheat an unveted cylinder and allow the excess heat to run away via the T&P relief.

Apart from the danger, its a waste of energy and water and very easy to avoid my correctly fitting in the first place.

Your comment was irresponsible and the practice dangerous end of...

Nobody is waving paper at you, you are in France which is covers by totally different regulation, thankfully in the UK people like you are prevented from fitting unvented and that thought certainly makes me sleep better.

[clockmanFR]

asorton,

Yes, It is standard practice here for unvented and yes the tanks get hot and the valve gear is designed to allow pressure release continuously.
Since you are not interested in other systems and you do not want to know, then that's fine. But please do not assume that French Unvented tanks are fitted incorrectly. What i show in the pics is standard fitting and standard practice here.

And you keep going on about "danger" and "its a waste of energy" but if your not willing to learn or understand other systems then please keep your ridiculous and unwarranted comments to your self.

Note, European Norms you know, so will possibly intstall the French system in my house in the UK.

 

[Solal]

the green pipe is the drain away pipe

Looks like a garden hose. 

[wookey]

Given the general lack of tanks in the rest of europe blowing up, the UK regs paranoia about unvented tanks could be deemed to simply be overkill.

[clockmanFR]

Solal,
I inherited this particular system. The original plumber used a 25mm dia hose to drain to the cellar drain that is in the centre of the cellar floor.

If you accidentally stand on it, then it does not break like a rigid would, and the hose very quickly recovers its shape.

I can not fault the original installers logic, but just typically quirky.

[dimengineer]

Given the general lack of tanks in the rest of europe blowing up, the UK regs paranoia about unvented tanks could be deemed to simply be overkill.

Hooray....