Wrong way round. .

[townfanjon]

Ehup Chaps . This was always on the cards , the customer was warned . Commissioning a boiler this morning , gas pressure miles off , commissioning aborted , back Monday to upsize gas pipe.
The first , say 10 meters of gas pipe ( 22 mm )is under, fecing 2 laminate floors Pffftttttt but I can get to the last 4/5 meters , can I put 28mm on the last section to the boiler to make sure it makes the required pressure, I have never done it but heard it can be done .
Thank you in advance

 

[ShaunCorbs]

Yes you can never done it myself

 

[Scott_D]

Have heard it works but I can’t see how

 

[Riley]

I’d be intrigued

 

[ShaunCorbs]

Have heard it works but I can’t see how

Volume it’s like an accumulator ish it’s hard to describe

 

[Riley]

Totally get the practicality side but anything you can’t see is absolute guesswork

 

[Harvest Fields]

Never done it but have seen it done before.

 

[Scott_D]

If you already have a 2mb drop on your gas run, upsizing at the end won’t get that back.

 

[Millsy 82]

I've done it just before Christmas. First 5mtrs was a pig but about 15mtrs was outside then the last 4 mtrs was a pig.

We changed the 15mtrs to try and get it as good as possible for Christmas then comeback in the new year to put 100% right. When I tested it we had less than 1mbar drop so was happy to leave it. I was quite happy to leave it permanently after that.

 

[Darren Jackson]

Upgrade as much as you can and see if you get the <1mbar drop. Even just changing the meter union to a 28 and 10" of 28 from meter makes a big difference.

 

[townfanjon]

Thank you for your comments so far guys , at the moment I have no idea what I am going to do , customer has been warned and is fine .

 

[Aire]

If you already have a 2mb drop on your gas run, upsizing at the end won’t get that back.

It can do, I've never done it but the logic is there. By increasing the pipe diameter anywhere on the circuit your reducing the resistance while increasing the volume.

 

[firemant]

Upgrade as much as you can and see if you get the <1mbar drop. Even just changing the meter union to a 28 and 10" of 28 from meter makes a big difference.

If you look at the bore of a 28mm meter union, you will find it is the same as 22mm!

 

[Last Plumber]

Ehup Chaps . This was always on the cards , the customer was warned . Commissioning a boiler this morning , gas pressure miles off , commissioning aborted , back Monday to upsize gas pipe.
The first , say 10 meters of gas pipe ( 22 mm )is under, fecing 2 laminate floors Pffftttttt but I can get to the last 4/5 meters , can I put 28mm on the last section to the boiler to make sure it makes the required pressure, I have never done it but heard it can be done .
Thank you in advance

You can do if there's no better way. I have see BG do it but to be fair it was impossible to do it any other way in that case. I would badge it up as that at the Meter so that future Engineers are aware of it being enlarged contrary to what is expected.

How far out is it and were other appliances affected?

 

[townfanjon]

You can do if there's no better way. I have see BG do it but to be fair it was impossible to do it any other way in that case. I would badge it up as that at the Meter so that future Engineers are aware of it being enlarged contrary to what is expected.

How far out is it and were other appliances affected?

I never did it in the end pal , just a huge job pulling the floors up , 2 laminates , bottom one glued , 8’ x 2 ‘ caber floor floor . Gas pipe in plastered wall , the house is full of furniture and bleeding nic-nacs , bloody nightmare job . I have spent all day running a 28 mm copper pipe round the house and through the garage , should finish it tomorrow lol , god I hope so .