Gas Pipe Size (1 Viewer)

Aug 11, 2013
440
325
Plymouth UK
Funster No
27,435
MH
Adria Compact
Exp
Since 2015
hi.... can anybody tell me how to tell if the pipe from regulator to gas distribution manifold is 8mm or 10mm. Mine is plastic coated copper.... do you measure the diameter including the cover, just the copper, or the internal diameter?

TIA

Chris
 

Silver-Fox

LIFE MEMBER
Sep 5, 2014
7,630
19,443
Cheltenham Spa
Funster No
33,201
MH
Rapido
Exp
im a not so newbie
You could just cut a bit of the plastic of and measure the od. If it’s 10 mm then it’s 8 mm pipe.
Or just measure with plastic on if it’s 11 ish mm its 8mm pipe
 
Jul 6, 2016
1,535
1,244
West Sussex
Funster No
43,954
MH
Carthago Chic A clas
Exp
Since 1990
You could just cut a bit of the plastic of and measure the od. If it’s 10 mm then it’s 8 mm pipe.
Or just measure with plastic on if it’s 11 ish mm its 8mm pipe

I always thought the size of the copper pipe was related to the outside diameter (without the plastic protection layer, if present).

The reason being, any couplings or olives are sized to fit the outside diameter of the pipe.

Subscribers  do not see these advertisements

 
Oct 29, 2016
3,482
29,078
Surrey
Funster No
45,842
MH
Carthago C Tourer
Exp
Motor Homing 4 years, caravan previously
I thought the gas pipes on our Carthago were plastic coated copper pipe also. However closer inspection revealed they were steel pipes with a plastic coating. The end of the 3 way Truma gas manifold valve under the worktop supplying all the appliances had an end plug which I have used to feed a new external BBQ point. On removal of the end plug I discovered that the pipe outlet was 10 mm, not 8mm as I thought it would be. This led to me having to get hold of 10mm to 8mm reduction olive kits, when having fitted I was not happy with.
I then had to have a brass reducer pipe manufactured only 65mm long but going from 10mm to 8mm OD size.
Lesson learned, Truma make distribution manifold valves with 8 or 10mm outlets with the main feed being 12mm in some cases. Carthago fit the 10mm outlet size due to the pipe length to supply heavy usage items like boiler and FF.
Good luck with your install, I was pulling hair out with mine at the time as I could not get to the manifold to fully remove it and replace with a 4 way, which would have been the simplest method.
Les
 

eddievanbitz

Trader - Funster
LIFE MEMBER
Oct 4, 2007
7,241
31,829
Taunton Somerset
Funster No
540
MH
RV
Exp
since 1989
hi.... can anybody tell me how to tell if the pipe from regulator to gas distribution manifold is 8mm or 10mm. Mine is plastic coated copper.... do you measure the diameter including the cover, just the copper, or the internal diameter?

TIA

Chris
What are you trying to do?
 
Dec 12, 2010
4,374
15,041
Cumbria
Funster No
14,651
MH
C Class
Exp
since 2011
As an aside, "pipe" is generally measured and specc'd by it's outside diameter, whereas "tube" is usually specc'd by it's internal diameter or bore.
 

Silver-Fox

LIFE MEMBER
Sep 5, 2014
7,630
19,443
Cheltenham Spa
Funster No
33,201
MH
Rapido
Exp
im a not so newbie
I always thought the size of the copper pipe was related to the outside diameter (without the plastic protection layer, if present).

The reason being, any couplings or olives are sized to fit the outside diameter of the pipe.

You are correct (y)

Must of had brain fade earlier :rolleyes:
Apologise for the misinformation.
I’m off to put the dunces hat on and stand in the corner :(

Subscribers  do not see these advertisements

 
Apr 22, 2018
4,452
8,621
Herts.
Funster No
53,503
MH
Adria Coral lowline
To reduce size from 10mm to 8mm I would have just used a solder fitting. Solder fitting are available in all the above mentioned pipe sizes.
 
OP
chrisinplymouth
Aug 11, 2013
440
325
Plymouth UK
Funster No
27,435
MH
Adria Compact
Exp
Since 2015
Ah Thought that you were cutting the pipe to add something, which I was going to advise you against lol
@eddievanbitz No just a spare regulator this time, but in the future was going to get a bbq point fitted. Would this involve a manifold change then? Existing one is a 3 way with no spare outlet.

Subscribers  do not see these advertisements

 

eddievanbitz

Trader - Funster
LIFE MEMBER
Oct 4, 2007
7,241
31,829
Taunton Somerset
Funster No
540
MH
RV
Exp
since 1989
@eddievanbitz No just a spare regulator this time, but in the future was going to get a bbq point fitted. Would this involve a manifold change then? Existing one is a 3 way with no spare outlet.
It would be easier and safer in my opinion to change for a four way manifold so you have safe and easy shut off for the BBQ point. Having said that I have given up fitting external BBQ points as I always find that they end up in the wrong place.

I use my BBQ under the awning sometimes, sometimes in the Sun, sometimes in the shade of a tree, sometimes carried around to my mates van, all over the place, determined by the weather, what I am cooking and the company. Gas pipes are only supposed to be 1m and even if you double or triple this, I found the BBQ always in the wrong place

So I am back to carrying a small lightweight bottle, so I can BBQ where I want not where I have to be!
 
OP
chrisinplymouth
Aug 11, 2013
440
325
Plymouth UK
Funster No
27,435
MH
Adria Compact
Exp
Since 2015
It would be easier and safer in my opinion to change for a four way manifold so you have safe and easy shut off for the BBQ point. Having said that I have given up fitting external BBQ points as I always find that they end up in the wrong place.

I use my BBQ under the awning sometimes, sometimes in the Sun, sometimes in the shade of a tree, sometimes carried around to my mates van, all over the place, determined by the weather, what I am cooking and the company. Gas pipes are only supposed to be 1m and even if you double or triple this, I found the BBQ always in the wrong place

So I am back to carrying a small lightweight bottle, so I can BBQ where I want not where I have to be!
Actually...... that’s a very good point.....
 

Funsters who are viewing this thread

Top