Boiler condenser pipe/overflow curved inwards?

[Uncle Peter]

Childish pedant.

[Tim Streater]

No, just noting your habit of talking c*ck.

[Uncle Peter]

My habit of not being childishly and unnecessarily precise.

[Vir Campestris]

Depends.

If you tell me there's a one in 100k chance I'll die on the way to work, and I'm going to do that trip for the next 10 years - that suddenly becomes about 1 in 40...

Andy

[Jeremy Nicoll - news posts]

That's right. When a surgeon tells you that some op that you're being offered has, say, a 10% mortality risk, it doesn't mean that 1 in 10 will die but not to worry because it won't be you.

The choice needs to be made by comparing one's outlook with no op (eg imminent expiry anyway) against the possibility that the op will go ok.

[Uncle Peter]

The chance of the pipe will be even less than 1 in 100K.

And I've now seen three of them that have vented, onto the wall, leaving an unsightly stain. And all of them showed with the pattern of water that it was not at any pressure at all.

[Uncle Peter]

But someone has to be stood next to the pipe, have pathetic reactions speeds, not be wearing jeans, and be bothered by getting a hot ankle.

[Uncle Peter]

Oh, I have a traditional heating system, just the boiler is in the boiler housing. The pump is in the loft. I have a header tank and a hot water cylinder with a cold tank above it. I thought this was called a system boiler. What is mine called then?

[John Williamson]

Or, in the case of most of the ones I've seen, a hot head.

[Uncle Peter]

Well since the three I've seen showing evidence of operating have shown evidence of a slow flow rate, then no.

[Uncle Peter]

Ah. I can't run mine more than halfway round the thermostat dial on the boiler or I hear worryingly loud bubbles and vibrations. Of course the boiler is very old so it may be the thermostat is actually sensing hotter than it shows on the dial.

[Richard]

Fuckwit's boiler.

[Uncle Peter]

It's a tried and tested simple system that doesn't go wrong or cost much to fit.

[John Rumm]

Yours sounds like a "heat|heating only" boiler with a vented primary. Definitely not a system boiler.

Heating only boilers were traditionally designed for use with vented (i.e. header tank) installations, although some can be converted to sealed operation.

[John Rumm]

I suspect the comment was in reference to the particular owner in this case rather than the boiler.

A vented system typically costs more to fit than a sealed system. Its more labour intensive, and typically uses more materials.

[Uncle Peter]

Fuck how much maintainence in the future eh? Mine is very simple and never goes wrong.

[Uncle Peter]

What do you mean by "only"? There are two (I changed it to three to heat the garage) valves in parallel, allowing it to heat the hot water tank, the radiators, or the garage radiators.

[John Rumm]

A heating only boiler is one that contains only the components required to heat the primary water - i.e. no pump, no valves, and limited controls and interlocks.

You need to assemble parts external to the boiler to make it do anything useful.

In comparison, a system boiler contains most of the parts in one box required for a rudimentary system.

[Uncle Peter]

Which is one of the reasons I prefer the heating only boilers. Less to go wrong in one box. The pump in my loft is not in my way or taking up any room I would have otherwise used. Neither are the valves. And they're far easer to get to than inside the would be larger boiler that is in the kitchen.