Plumbers overspecifying boilers

[Balenza]

Doitall wrote

The expansion vessel cannot fail, unless some clever idiot decides to weld it together.

Or isolate it from the system as an incompetent would do. Then you have the potential for failure.

Not one persons alive or dead has been killed by an un-vented cylinder in this country

Well it would be pretty difficult to kill them if they were already dead.
The fact remains it has happened and will happen again.

 

[Doctor Drivel]

Doitall wrote

The expansion vessel cannot fail, unless some clever idiot decides to weld it together.

Or isolate it from the system as an incompetent would do. Then you have the potential for failure.

Or use a Megaflow which doesn't have an expansion vessel.

 

[doitall]

Quote:
How many people have been killed by an un-vented cylinder in this Country.[/quote]

Answer None

Incorrect. See below..............

If pressure equipment fails in use, it can seriously injure or kill
people nearby and cause serious damage to property. Each
year in Great Britain, there are about 150 dangerous
occurrences involving such unintentional releases. Around six
of these result in fatal or serious injury.

They are not talking about un-vented cylinders and you know it.

No-one has been killed by an un-vented cylinder in this Country, if you know different then prove it. because you cannot.

Well it would be pretty difficult to kill them if they were already dead.The fact remains it has happened and will happen again.

As above no-one has been killed by an un-vented cylinder in this Country.

The weld by the way is the strongest part of any mechanical joint.

 

[Doctor Drivel]

and if you want to add an sludge bucket, with yet another PCB that goes wrong for a pastime, then good luck and I hope I'm wrong.

Your ignorance never fails to amaze.

 

[doitall]

Or use a Megaflow which doesn't have an expansion vessel.

The boiler does Drivel.

And not even you can belief an DIY would take the boiler to bits so he could doctor the expansion vessel.

 

[Balenza]

Diyitall wrote

The expansion vessel cannot fail, unless some clever idiot decides to weld it together.

This one is interesting. Note the expansion vessel is isolated from the cylinder via a filling loop and the isolating valve is in the Off position.
Very clever. One of your installs perhaps Doitall ??.
I wonder what else has been isolated or not fitted.

 

[Hugh Jaleak]

Im with Doitall on this one. The fact is no-one is able to provide evidence of a case where an Domestic Unvented Hot Water Installation has failed causing injury. Repeated quotes of the same passage lifted from the HSE do not supply this evidence. Pressure equipment is a generic term and can equally apply to any apparatus thats works under pressure, be it air, steam, hydraulics et al.

Maybe rather than putting down anyone who doesnt share your opinions, you could help the OP with his original query, and use your obviously superior intellectual abilities to help him design his system.

 

[doitall]

ballski This one is interesting. Note the expansion vessel is isolated from the cylinder via a filling loop and the isolating valve is in the Off position.
Very clever. One of your installs perhaps Doitall ??.
I wonder what else has been isolated or not fitted. icon_rolleyes.gif

Interesting choice of pics balski

You are aware thats an store and not an un-vented cylinder, that pipe with the filler loop is to fill the outer chamber.

 

[Doctor Drivel]

Im with Doitall on this one.

You are. Another one who wants to see bodies because he has no analytic abilities.

 

[Doctor Drivel]

Or use a Megaflow which doesn't have an expansion vessel.

The boiler does Drivel.

I can't believe this! This Weshy/Wurzle doesn't know that the boiler circuit and DHW circuit are separate! My God!!! Appalling!

Just as well I don't like rugby.

 

[Corgigrouch]

Some silly bugger has put it in on it's side...Drivel, is this one of yours?

 

[doitall]

The heat source Drivel.

Even an DIYer knows you have to have an heat source or it cannot overheat

 

[Doctor Drivel]

...

 

[Doctor Drivel]

Some silly b*****r has put it in on it's side...Drivel, is this one of yours?

It think is best to put unvented cylinders upside down - in the skip.

 

[Doctor Drivel]

The heat source Drivel.

Even an DIYer knows you have to have an heat source or it cannot overheat

You are confused and laughing a lot. Have you tried therapy?