Using one boiler instead of two.

[bengasman]

Quoting some lines from a document that you have googled proves very little about having acces to cc, let alone being an experienced RGI.
Any fool can quote. Understanding what you quote is a different story.

The numbers ARE arbitrary.

They may be supported by a theory, but that doesn't change the facts that the numbers BY THEMSELVES are simply chosen.
The calculations are also based on numbers that are simply CHOSEN as a limit for what is safe and what is not.

120 seconds for a let by test could just as easily have been set at 100 or 150.

The amount of gas that escapes from a 4 mb drop is not so much different from what escapes at a 3 mb drop or a 5 mb drop.
Apart from that, none of the three has a realistic chance of building up to a dangerous concentration in a normal dwelling.
If it was, the old fashioned bypass would have had a compulsory ffd of some sorts.

 

[bengasman]

Thats not Dicks style,he normally takes the mickey with a bit of style,This person is definetly not Dick Puller

Am I getting the trolls mixed up again?

 

[Happyplumber]

Yep remeber dicky very well ,he is probably around somewhere but this geeza aint him

 

[bengasman]

It looks like I am loosing track of which troll is which, might be the onset of senile dementia.
With a bit of luck, I'll soon be able to grab girls' bottoms, and all they will say is: "Oh don't mind him, he doesn't know any better."

 

[commercialman]

************

 

[Biggles..]

Fight.

 

[bengasman]

Oh, just let him Mod10, he doesn't know any better.
"spot the troll" can be quite interesting; they all have their own manerisms that they can't get away from. Even if you loose track of who is who exactly, it's amazing how easily they fall in the same traps.

 

[commercialman]

Fight.

Not possible , some have lie down & take the beating or be thrown off the site.

 

[Agile]

It looks like I am loosing track of which troll is which, might be the onset of penile dementia.

With a bit of luck, I'll soon be able to grab girls' bottoms, and all they will say is: "Oh don't mind him, he doesn't know any better."

 

[commercialman]

.

The amount of gas that escapes from a 4 mb drop is not so much different from what escapes at a 3 mb drop or a 5 mb drop.
.

That will be dependant on meter volume , hence the reason maximum permitted leak rate differs (appliances connected) when different type meters/pipework are installed , 1 mb pressure drop on an E6 installation would be negligible compared to a 1mb drop on a U16/G10 installation , this is the reason these figures are not arbitrary , the 'powers to be' have already done the maths for us (IGE/UP/1B) , if a domestic installation were tested in accordance with IGE/UP/1-1A it would be clear to see MPLR figures were not just 'pulled out of a hat'.

 

[bengasman]

.

The amount of gas that escapes from a 4 mb drop is not so much different from what escapes at a 3 mb drop or a 5 mb drop.
.

That will be dependant on meter volume

No it is not.
Read my post 4 more times, with the telly off, maybe you'll understand.

 

[commercialman]

.

The amount of gas that escapes from a 4 mb drop is not so much different from what escapes at a 3 mb drop or a 5 mb drop.
.

That will be dependant on meter volume

No it is not.
.

Yes it is , i wonder how many assessors would take a dim view of this?

MPLR= 1mb drop on a U16 , 8mb drop on an E6...............................

 

[doitall]

.

The amount of gas that escapes from a 4 mb drop is not so much different from what escapes at a 3 mb drop or a 5 mb drop.
.

That will be dependant on meter volume , hence the reason maximum permitted leak rate differs (appliances connected) when different type meters/pipework are installed , 1 mb pressure drop on an E6 installation would be negligible compared to a 1mb drop on a U16/G10 installation , this is the reason these figures are not arbitrary , the 'powers to be' have already done the maths for us (IGE/UP/1B) , if a domestic installation were tested in accordance with IGE/UP/1-1A it would be clear to see MPLR figures were not just 'pulled out of a hat'.

Don't get too many domestics on a U16 with gas pipework 35mm or below

 

[commercialman]

Don't get too many domestics on a U16 with gas pipework 35mm or below

Thats not the point doitall.

 

[doitall]

Don't get too many domestics on a U16 with gas pipework 35mm or below

Thats not the point doitall.

It is a good point, 35mm and above is a different set of rules for gas.