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where to buy iron fittings for gas???

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Yes. Use a little jointing paste on the face to aid the seal. But the copper faces will seal better than iron only
 
You will still need a few mm of play between two fixed points with those unions.
 
Yes a little bit of play, a couple of mm am sure they can get. better than the other unions. And it was only £19 from Harris & Bailey. (Big thank you from heliotrope for pointing me to them). What paste do you guys use?
 
Jet blue all the way. I use straight wrought unions, no bother with a bit of paste!
 
straight, as in common or garden. I actually have more trouble with flat faced unions.
 
I get you now cropster. Don't know about having trouble putting them in, but, trying to get hold of those flat faced unions is a nightmare. I hope the above one will judt manage it. Otherwise it is off to plumb centre for a £66+vat wrought flat faced.
 
Are you not able these days to just thread the pipe a bit longer and then use back nut? With paste it wouldn't leak like ptfe does if you unwind it a bit after tightening it up too much
 
Use loctite 55 on your threads mate with bit of gas paste ,

like simon says i use bit of paste to aid the seal gas paste on gas but each to their own
 
Am getting quite a bit of commercial work now. Mostly due to churches passing my name on.

For the 2 for the day £500. Which I think is reasonable. then £90 for nitrogen to purge system. It is a bigger job than I realised really. Plaque heaters with pilots that need to be re-lit and that requires scaffold. Will remember next time though to add more to my quote.
 
remeber commercial means ££££££'s

am getting offered fair bit so looking at booking my tickets as getting fed up subbing it
 
hammers4spanner said:
Use loctite 55 on your threads mate with bit of gas paste ,

like simon says i use bit of paste to aid the seal gas paste on gas but each to their own
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It's very late, I'm quite old and I have quaffed getting on for a litre of the red stuff but without
resorting to the regulations I am fairly sure that you can only use one or the other on gas threads
but not both.
 
The fm companies have the good stuff signed up. Most of what is left is the dross with the odd good one here and there It depends what you are being offered. The money isn't really any better you're just not knocking your pan in to make it.
 
heliotrope said:
It's very late, I'm quite old and I have quaffed getting on for a litre of the red stuff but without
resorting to the regulations I am fairly sure that you can only use one or the other on gas threads
but not both.
Click to expand...

Thats what i'd say too. And, only hemp on joints 3" and over which is now all welded anyway!
 
As far as I am aware you dont need to paste loctite but not read anything saying either but then never seen nothing on pack olives saying same I do it because always have
 
Well, that was an interesting day. After all that effort sourcing pipe and materials I turn up to the job excited to get started. As soon as the commercial guy turns up, he looks at existing pipe and mine and says, that's too big. This is inch and a quarter and I have inch and a half. Luckily the pipe has play on it and he has fittings on the van.

Then off to look at the meter, the meter does not have a purge point on it. And, there is no chance we can purge job just by air, so need to use nitrogen, but no place to connect it to.

Then were off looking for another plan. Go upstairs and he spots plaque heaters with no ventilation. Says, that's not good. So we ask to look at cp12 of the commercial type. Plaque heaters not listed on it.

So we find an iso valve at kitchen which is inch and a quarter reducing down to 28mm. He says that is your best option. So that gets tee'd into and another valve and test point put in.

I am wondering, from this iso we put in, could I bump the diameter upto 32mm if I needed? As we all know gas compresses.

Oh the joys of being a plumb bum.
 
The guy said he would never be able to get all the air out without nitrogen. Something to do with all the plaque heaters and nightmare runs of pipework
 
tamz said:
Every riser in the country is galvanised
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And LPG has to be in galvo, not wrought. Because of the moisture content of the decompressed gas.

tamz said:
Thats what i'd say too. And, only hemp on joints 3" and over which is now all welded anyway!
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oooo hemp! no no no! Anything up to 1" with any pressure can be screwed or welded, Up to 2" and 500mbar can be screwed, anything over 2" or over 500mbar welded only.

I've just corrected Tamz! I'm going to that special corner of hell reserved for people that dare do that!

hammers4spanner said:
purge commercial pipes with air??
5-15% explosive ratio ?
isnt that dodgy?
Click to expand...

Aye. indirect purge through a stack! doddle!

Mind you, I don't do any calculations, I connect the compressor and give it stacks!
 
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