External pipe for new boiler

[Biggles..]

Corgi recently changed the book with regards to sleeveing, any plastic is now suitable where as before if you used pastic it had to be a plastic suitable for carrying gas.

Still use copper myself but 35mm becomes expensive when only using it for sleeves

 

[dan the man]

your supposed to sleeve pipes for gas?

 

[sambotc]

Hi,


Is this a warm front job? i;e grant work.

Only reason i ask is because a) it's an ideal b) external pipework.

When you say there is a smaller pipe going 'into' a bigger pipe, are you sure they are not connected, and just a reducing fitting?

This would then make sense, as the new boiler would require a 22mm gas supply from the meter to within a metre of the boiler, and the ideal's have a 15mm connection so therefore you would have to reduce down in order to connect?

Sam

 

[namsag]

The rules on sleeving are a joke they should say a minimal amount bigger than pipe that is being sleeved. but don`t . Point of sleeve is to contain gas if movement in structure of buildling breaks pipe , but sleeves are generally that tight they would also break.

 

[Paul Barker]

All Ican say I'm glad I wasn't the professional who did this job faultlessly, but has to suffer all this ignorant questioning.

I had a job like this where fortunately I was able to nip it in the bud at the estimate.

"I'll have to run a new gas pipe along the outside wall"

"I don't like that"

" it's the shortest route and safest way to run it"

"I've never seen that" (with a you are an idiot questoining tone)

"I'm glad you are such an expert because you are on your own. Paul walks away relieved of the burden of another install in which the conditions set on us from one side are impossible to negotiate and the moans and groans from the other are downright insulting.OP here is insulting the installer.

 

[namsag]

Trouble is Paul you get one half wit talking to another and they are adamant they know better than you the pro after baffling each other with bull shi#e..

 

[gas4you]

Gas4you Plastic is ok if the right kind

Thanks namsag. I must still be living in the dark ages here

What kind of plastic is suitable, as I too whince when I have been buying 35mm copper just for sleeving. Ouch

 

[Paul Barker]

Trouible with me is I'm having a problem justifying the charity I run to myself and my family this weekend I may have to make some tough decisions which will affect thge prospects of a nice young man who is puting in his best efforts but hasn't the skill to contribute a penny to overheads including his own cost to the business. Another guy who has some skill and has been working alongside on trial is probably not going to be offered a job either, but will be passed on work should he wish to go self employed. Paul in his heart knows the best thing for himself and family is to go it alone again shoulder the excessive overheads already committed to this year and slash them next year to a level a sole trader can supply the effort to make use of.

It's a hard decision because it is noce to offer someone keen an oppoortunity and there is no problem at all geting work, the problem is geting customers who don't think life on Mars is a good example of how it is right to throw yourself off a multi story car park, and finding people with sufficient skill to earn even sufficient to pay their wages let alone contribute to overheads.

 

[namsag]

Gas4you this is wording from the book.

A sleeve should be made of a material capable of containing or disrtributing gas eg copper,steel, medium density polyethylene (mdpe) polyvinyl chloride(pvc) or other suitable plastic.

It then goes onto mention if copper and steel is mixed for pipework and sleeving they should not touch because of possible corrosion by electrolysis.

 

[stumpynut]

Namsag wrote :

Point of sleeve is to contain gas if movement in structure of buildling breaks pipe

Namsag, i'm not nitpicking here but a sleeve should only be sealed on one side (i.e. sealant, denzo etc) so how would this contain gas ? Not having a go here just wondering if i had the wrong idea.

 

[namsag]

Point taken Stumpy. you have correct wording . Was on about when a sleeve goes through a cavity wall one of the original idea`s behind sleeving was to stop gas entering the cavity if building movement fractured pipe allowing cavity to fill with gas. So if sleeve is really tight this could also fracture.

Noticed that it used to say no joints at all in a sleeve now it just mentions screwed and compression no mention at all of soldered

 

[gas4you]

Thanks for looking this up namsag

Also answers point about being the same material to a degree

Stumpynut, I always seal both on the internal side so if there was a leak then it would pass to outside so it can be smelt. At least I got this bit correct

 

[HarrogateGas]

I thought the sleeving has to plastic and its purpose was for protecting the copper (or metallic) gas pipe from corrosion when passing thorough a wall.

 

[namsag]

Harrogate 2 purposes of of sleeve .....A sleeve is required to protect the pipework against any possible movement in the wall and corrosion from cement/mortar.. So your right in your thinking.

Gas4you inside unless it is where a pipe enters from inside a meter box then it should be sealed on the outside

Gas4you i see your in norwich have you or any of your mates had the pleasure of a mr tobin from Corgi

 

[gas4you]

My local corgi inspectors have always wanted it sealed internal to property but open externally to let smell out