Replace Gas Regulator?

RichardandKaren

RichardandKaren

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Joined
Oct 4, 2017
Posts
149
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Location
Leamington Spa
Funster No
50,836
MH
Rapido 786F
I was reading recently about carrying a spare gas regulator as a sensible spare part to have on the m/h. We have had our m/h for a couple of years. It's a 2004 Rapido and the regulator seems to be working fine. I don't know for sure, but I suspect the regulator fitted ( a Cavagna type 924C) is the original. So, I'm in the process of sourcing a spare when I read that it is good practice to replace a regulator when it's between 10 and 15 years old anyway. So, should I just go ahead and replace the existing with a new one ( and maybe keep the old one as a spare)? That Cavagna model doesn't seem to exist any longer - any recommendations for a like for like replacement which can be fitted easily? I have never worked on anything LPG related before - is it an easy process to replace a regulator and do I need any special tools/pastes etc?
Thanks
Richard
 
You'll just need spanners of the right size to loosen and tighten the nuts, usually a screwdriver for removing the old reg from the bulkhead and fitting the new one, you may need to drill new holes for the mounting points as they're unlikely to be in the right place.

Its not difficult but you need to make sure the reg you buy is the right pipe size for your set up, usually 8mm or 10mm, for where it connects up to the existing copper pipe.
 
I wouldnt be replacing it if it working.. as for carrying a spare i think any of the commonly available bulkhead regulator will suit..i think yours is rated 30mb and 1500g/hr and that seems fairly standard.
Only other point is what are the connectors... usually either 8 or 10 mm.. just make uure the spare is the same as existing..
Andy
 
Hi,
Some years ago our regulator packed up, it was a Truma and there seemed to be a spate of that brand failing.
I replaced it with a Clesse which worked well. You need to know what size of pipe, Mel is quicker than me.(y)
 
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We have only changed one blocked regulator in 11 years. (y)
So no we don't bother carrying a spare. :LOL: Bob.
 
Have carried a spare regulator for years. At the last hab check Dave fitted it on the basis the original was 12 years old and I've just kept the old (but still serviceable) regulator as a spare.
 
While on the subject of regulator spares/replacements, I have a 37Mb regulator screwed directly into my Gaslow. I keep this as I also have a Calor cylinder as back-up, but unused in 10 years, but changeover would be easy if needed.

Are these 38Mb regulators with 21.8mm LH threads still readily availabe?

If not easily obtainable maybe I should get one now. And maybe fit it and keep the existing one as spare - it must be 16 years old.

Geoff
 
With the bulkhead regulator in place, how do you tell whether the pipe is 8mm or 10mm? With only 2mm difference, a visual guess is risky.
 
If a 8mm open ended spanner fits round the pipe it should be 8mm and if it doesn't you know what.:)
 
raysalaugh said:
If a 8mm open ended spanner fits round the pipe it should be 8mm and if it doesn't you know what.:)
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Understood. Thanks. Easy when you know!
 
bobandjanie said:
We have only changed one blocked regulator in 11 years. (y)
So no we don't bother carrying a spare. :LOL: Bob.
Click to expand...
We’ve only had one regulator fail in 15 years !
But that’s exactly why I do carry a spare bulkhead regulator and a couple of different bottle regulators too (y)
 
I know it doesn't have to be age related to fail, ;) but ours on this motorhome is only 2 years old. :LOL:
We have been using refillable bottles since 2007 and not had any problems since the regulator has been as high as possible and pig tails as short as possible, then if there is any oil it will not lay in them. :LOL:
I left one refillable on the last van, and have one and a spanish Propano. (y) Bob.

20190212_111216.jpg

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I carry a bottle top regulator as a spare with a hose that allows me to bypass the Truma bulkhead regulator if it ever fails.
 
Lenny HB said:
I carry a bottle top regulator as a spare with a hose that allows me to bypass the Truma bulkhead regulator if it ever fails.
Click to expand...
How would you connect it up Lenny if you need to use it?
 
peterc10 said:
I have rupture protected hoses with the green buttons you have to push down when you open the valve as show in the photo in the post by @bobandjanie . Can these be used with the Ebay auto change regulator, as linked to by Mel, @Minxy Girl ?
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They can be used with any bulkhead regulator assuming the connection thread is compatible, I think they all use the same thread.

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Lenny HB said:
They can be used with any bulkhead regulator assuming the connection thread is compatible, I think they all use the same thread.
Click to expand...
Lenny, I am not that stupid!!!!!!!!!! :LOL:

I was thinking would you have to still have to press the green button when it automatically changed over to make it work.
 
I think that green button only pops out when the pressure drops so hopefully only the empty cylinder would need resetting but the changeover process might trigger something if the pressure dropped. You would lose the crash protection of the Truma regulator and they say you need both to travel with the gas on.
 
Pausim said:
I think that green button only pops out when the pressure drops so hopefully only the empty cylinder would need resetting but the changeover process might trigger something if the pressure dropped. You would lose the crash protection of the Truma regulator and they say you need both to travel with the gas on.
Click to expand...
I always travel with my gas on so that is why I am trying to decide to replace my single entry point Truma regulator with a cheaper twin version from another maker, or to use the Truma twin one. The problem with the Truma is that mine is mounted horizontally at the top of the bottle locker, but at that point the locker is narrow (front to back) and I don't think I have enough room to squeeze the twin one in. That would mean the more difficult job of trying to get the the vertically mounted one at the back.
 
I think only Truma do the regulators with crash protection, though I would like to be proved wrong. If I am right this rather limits your options.
 
Not wanting to hi-jack the thread and please move this post if necessary but is fitting a new bulkhead regulator a job for an amateur like me? I ask because on the Truma site, it says after fitting (which seems easy enough) a technician must carry out leak tests.
I have had a Truma mono control fail and a new one fitted. However, I would like to carry a spare but wonder about fitting it if and when it fails.

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Ingwe said:
I have had a Truma mono control fail and a new one fitted. However, I would like to carry a spare but wonder about fitting it if and when it fails.
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Im in the camp that says do your research and give a job a go.. be prepared to make mistakes and learm..
On the fitting of a gas regulator it is really that easy.. and the connections can be checked with leak detector spray very easily.. you could even install a leak detector device close to the regulator to monitor your system downstresam of the device..

Theres a few points that im still trying to get to the bottom of... the truma regulator with excess flow shut down facilities used to have to be installed with the correct hose to be effective.. or thats what i thought... pressing the regulator green button simply allowed the pressures set by the springs of the regulator to be restored..

Looking at their site now and seeing that they now call their device a crash protection .... that is a completely different device by the looks of it.. ie that will shut your supply in the event of a bump but looking at the way it operates it wont protect against excess flow.. ie a split hose etc.. now pressing the green button simply allows a ball to re seat and the inline valve to open..
They mention brifely hoses with rupture protection so i assume you would need to install that with the crash protection to get full protection..
Sure someone can enlighten me as im curious..
Maybe dave newall.. @dave newell lvs
Thanks
Andy.
 
My understanding is you need both bits. The rupture protection device only covers the high pressure side from the bottle to the regulator but would not be triggered by anything that happens beyond the regulator. The crash protection regulator shuts of the low pressure side i.e. everything downstream of it, in the event of a bump. If I have got this wrong I have no doubt It will be corrrected by one of the professionals.
 
The van came with a Truma Monocontrol CS bulkhead regulator fitted. It had an orange/brown pigtail with a green button connected.

When the Truma dealer fitted the replacement (identical to the original) the new pigtail (black) didn't have the green rupture button as fitted to the original. I asked about this and he told that the anti-rupture control was in the regulator (which has its own little green button). So, you pays your money.....
 
Ingwe said:
The van came with a Truma Monocontrol CS bulkhead regulator fitted. It had an orange/brown pigtail with a green button connected.

When the Truma dealer fitted the replacement (identical to the original) the new pigtail (black) didn't have the green rupture button as fitted to the original. I asked about this and he told that the anti-rupture control was in the regulator (which has its own little green button). So, you pays your money.....
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I think he is talking nonsense. The green button on the regulator simply cannot protect you if the hose to the regulator splits or comes off for some other reason.
 
peterc10 said:
Lenny, I am not that stupid!!!!!!!!!! :LOL:
Click to expand...
Are you sure?:ROFLMAO:

peterc10 said:
I was thinking would you have to still have to press the green button when it automatically changed over to make it work.
Click to expand...
No, it's just a pressure switch in the hose independantof the regulator.

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