LPG to Propane Supply Conversion Questions

[Boy1925]

I used to have an LPG C/H boiler supplied from a bulk LPG tank about
25 metres from the house. Having dispensed with that boiler (I now have an air-source heat exchanger), I wish to utilise the underground
pipe which is 25mm yellow plastic, to feed propane gas from a smallish
19kg bottle, to my hob, which currently receives its gas from the same bottle through a 15mm copper pipe, the bottle being situated only about 4 metres distant.
How best should I do this?
Can I just connect it all up and expect the pressure to be adequate, or should I be thinking of inserting a smaller bore plastic pipe within the 25mm one so that the pressure drop is less?
Any helpful advice would be gratefully received.

 

[mountainman]

I'd recommend that you get a GSR engineer with an LPG ticket to sort it out for you.

 

[snowhead]

Can I just connect it all up

NO, otherwise you wouldn't need to ask

Any helpful advice would be gratefully received.

See reply in post above.

 

[Boy1925]

Thanks for the encouragement so far!
Actually, an indication of what should be done and how would be helpful.
Suggesting that I should not tamper with things I do not understand
was not what I hoped for from this forum.
I shall happily concede that the responses so far will undoubtedly have been well intentioned.

 

[ecowarm]

Hi boy1925 and welcome to the forum.
We try help with good advice and I think it is a friendly forum.
But you will not get help with DIY gas work, end of.

 

[snowhead]

Actually, an indication of what should be done and how would be helpful.

Do the calculations for pressure drop based on pipe size, length and likely consumption, check the existing pipe is suitable, check the existing pipe is sound.

Using appropriate fittings complete the connection and test.

Suggesting that I should not tamper with things I do not understand
was not what I hoped for from this forum.
I shall happily concede that the responses so far will undoubtedly have been well intentioned.

Would you expect to replace the brakes on your car if you had absolutely no knowledge or training on such a job and would you be happy to drive the car with passengers in if you had managed to fumble your way thro' the job?

If you want advice on how to run waste pipes or fix non gas related problems I'm sure plenty of people will offer advice.

 

[Whn1]

I doubt you'll find help on this subject, we've spent to much money, time and effort to get our gas age quals. Not only that I wouldn't want to advise anyone that I didn't think or know was competent. Good luck

 

[Mike Jackson]

I used to have an LPG C/H boiler supplied from a bulk LPG tank about
25 metres from the house. Having dispensed with that boiler (I now have an air-source heat exchanger), I wish to utilise the underground
pipe which is 25mm yellow plastic, to feed propane gas from a smallish
19kg bottle, to my hob, which currently receives its gas from the same bottle through a 15mm copper pipe, the bottle being situated only about 4 metres distant.
How best should I do this?
Can I just connect it all up and expect the pressure to be adequate, or should I be thinking of inserting a smaller bore plastic pipe within the 25mm one so that the pressure drop is less?
Any helpful advice would be gratefully received.

The fact that you think that using a smaller bore pipe to reduce pressure loss indicates that you don't understand what is involved in the job. Are you aware of the tightness tesing, and testing for let by times with LPG? Are you aware of the fact that some materials used with natural gas are not suitable for LPG?

Just because LPG comes in a bottle does not make it any less dangerous than natural gas. In fact the properties of LPG tend to make it more dangerous because it is more searching and if it does leak it tends to puddle rather than disperse.

 

[Roger Welton]

And the lpg is explosive in much lower concentrations than natural gas.

 

[Boy1925]

Thanks guys. All comments appreciated.
I have actually been waiting for the gas man to call and look over the job for some months and really, I need to chase him up, or get someone else to come out. Unfortunately the job is at a fairly remote site!

 

[ecowarm]

Where are you? someone on here could be close

 

[Boy1925]

Where are you? someone on here could be close

Ardfern near Lochgilphead Argyll.