Sealing gas pipe

[bikerbas]

Our college tutor told us when passing a gas pipe through a cavity wall to outside through a sleave you seal the end on the outside so any gas escape can be smelt inside the property,he said if you did it the otherway you wouldnt know if you had a gas leak.
I said to him in the BPEC gas book it states the over way round
What do you guys think
Cheers

 

[oldplumber]

your correct seal the inside so leaks to outside, always has been the routine to follow, and you have it in writing from your bpec book.

 

[bikerbas]

Cheers thought so

 

[Billy Bob Bob]

its common sense when you think about it,you would not want to smell gas inside the propety

 

[Mbear]

does This rule change all the time?
I'm sure it's inside then outside then inside again.

I would never say for sure which way it is

 

[Plucky]

Just to throw a spanner into the works whats yor views on sealing a sleeve that passes from a cupboard under the stairs (where the meter is) into kitchen?? Seal it cupboard side or kitchen side.

 

[kirkgas]

[FONT=CenturySchoolbook,Bold][FONT=CenturySchoolbook,Bold]

the following in copied straight from BS6891
"8.10 Sleeves
8.10.1​

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[/FONT]​

[/FONT]Sleeves shall be of a material capable of containing gas, e.g. copper, steel, polyethylene or polyvinyl
chloride (PVC).​

[FONT=CenturySchoolbook,Bold][FONT=CenturySchoolbook,Bold]

8.10.2​

​

[/FONT]​

[/FONT]Sleeves shall pass through the full width of the wall or the full thickness of the floor. Sleeves shall
not impair the fire resistance of a building. The annular space between the pipe and the sleeve shall be
sealed at one end to the pipe with a flexible fire resistant compound. Where a sleeve passes through an​

exterior wall, the seal shall be on the inside of the wall."

Just to throw a spanner into the works whats yor views on sealing a sleeve that passes from a cupboard under the stairs (where the meter is) into kitchen?? Seal it cupboard side or kitchen side.

i tend to suggest a sensible approach to which side of an internal wall i seal, ie if a gas leak appears which side would identify the leak quicker, if eachy peachy, i then decide to seal on the side that can be inspected, as i know all engineers are very good at their job and may question my pipe not being sealed in the sleeve if they cant see it, if both sides are accessible i simply seal on whatever side i find myself on when i go back round sealing the pipes after TT

 

[Kip]

This one is one of those rules that kind of contradicts itself.

Rule of thumb is if your going through a cavity you seal the inner side but then again if your going through a meter box into the home you then seal the outer of it which is in the meter box.

 

[kirkgas]

This one is one of those rules that kind of contradicts itself.

Rule of thumb is if your going through a cavity you seal the inner side but then again if your going through a meter box into the home you then seal the outer of it which is in the meter box.

there isnt a contradiction in the two scenarios you gave, if a gas pipe enters a property inside a meter box and is sealed in the inside any escaping gas from a major gas leak at the meter will enter and fill the cavity of the house, therefore you seal the pipe inside the meter box, a normal gas pipe is a far less risk of leaking and forcing gas into the cavity as 1) there are less things to leak as there is no meter, 2) the escaping gas is not confined inside the box and therefore less likely to be forced into the cavity 3) the meter could be medium pressure and therefore amount of gas could be seriously high inside box

 

[Kip]

The contradiction is that the the in both cases the pipe goes through the cavity.

 

[kirkgas]

The contradiction is that the the in both cases the pipe goes through the cavity.

it is different because of the potential of gas forced into the cavity from both scenarios is vastly different

 

[princegoose]

Seal pipe INSIDE meter box

seal pipe on internal side in all other occasioans.

when going through one room to another seal in room with smaller volume