LPG adaptation

ga002 without side connection [184x320px]In this article, I will explain to you how I proceeded to adapt my Motorhome to LPG ( the gas is used for the refrigerator, the 3-burner hob, the oven, the production of hot water / air heating pulsed ), with some pictures of my installation ...
I first ordered an LPG tank here 1 . this is a 27L Alu LPG cylinder with pressure gauge, of which here are some characteristics:

  • Total content: 27 L
  • Gas content: 21.6 L ( 80% fill )
  • Empty weight: 6.6 KG / filled 17 KG
  • Dimensions: height 625 mm ( sleeve included )
                         diameter 300 mm
                         Height without sleeve: 570 mm
  • The manometer is a real level gauge because it has an integrated float
  • High security valve only allowing filling up to 80%, or approximately 21L
  • No need to wait until the bottle is empty to refuel
  • No deposit or brand problem
  • No conversion of the motorhome ( as in the case of a vehicle running on LPG ... )

It is obvious that the whole is quite expensive, but there is no more handling of the bottles, and the back suffers too.
A propane refill costs around € 30 ( still for ~ 21L because it is 80% full ... ) while the liter of LPG is around € 0.6.
The difference in weight is far from being negligible, because it is about 11Kg of gained on a single bottle, whereas a classic steel bottle weighs about 17Kg according to the brands ( empty ... ).

punctuation iconBefore reading the following, please know that I can in no way be held responsible for any damage that your equipment may suffer during or / and after this type of intervention.


As the GAZ gate is not solid because it is made of thin polyester ( Image 1 ), I was forced to drill the outer wall composed of wood panels and polyester + insulation
( Image 2 ) to place the filling connection.
It is in fact better that the connection be made on a rigid surface, the weight of the filling gun for LPG pumps being relatively heavy.

Position of the external filling connection ...
Image 1
DSC 2016 0006 [320x180px]
Image 2


For drilling the Ø28mm hole, I used a simple Ø25mm trephine ( also called a " hole saw" ... ), having taken care beforehand to place the self-adhesive drilling guide supplied with the kit,
then I enlarged clean the hole with my DREMEL equipped with a polishing drum . I then drilled the 4 Ø5mm holes.
When assembling the filling connection used, I have a white Silicone gasket ( for indoor / outdoor use ... ), between the outer face and the black plastic valve support, in order to avoid water infiltration. ..
The filling connection is not fixed with the screws supplied ( too short ... ) but withØ5x50mm stainless steel screws with countersunk head .

Housing of the 2 bottles in the gas box ...
Image 3
View of the lyres connections on the AluGaz bottle ...
Image 4

I had to remove the original sleeve present ( Image 3 ) at the top of the AluGas bottle because my trunk is cramped, and the handling of the valve on the bottle was painful. In addition, this is required by the regulations in force.
Of course, I kept my ( full ) Propane bottle so that I could use it just in case ( it's well known, gas failures always occur at night, or during meals and on a Sunday in addition ... )
To do this, I only have the bottle inverter lever to handle, since the lyres are permanently attached ...

The following photo ( Image 4 ) shows a particularity of the assembly which apparently depends on the date of manufacture of these LPG tanks:
Between the outlet of the AluGas bottle and the filter( not compulsory but recommended to avoid the rise of fatty deposits of all kinds ... ), I inserted the adapter for French gas installation( ref: GS058-4 ) delivered automatically with the filling adapter kit.
In fact, I had to remove the fitting ( ref: GS058-4), due to a large leak at the junction of the filter inlet. So be careful, it seems that all the bottles are not the same ...
To detect a possible leak, I used an aerosol leak detection canister for any type of gas, GAZINOX.
To be expected, this is the ( low ) price of tranquility!

Regulation 3 :

Regarding distribution  :

  • French regulations strictly prohibit the filling of cylinders from an LPG fuel dispensing station.
  • It is forbidden to charge a gas bottle if it is not a rrimé permanently to the camper and if its filler is not directly fixed to the body.

Concerning the tank:

  • The latter must be installed in a sealed box opening to the outside, equipped with top and bottom vents.
  • Fixing must be ensured by a metal strap bolted to the wall of the trunk .
  • The tank must not have handles for carrying it .

Regarding fire resistance  :

  • The tank is fitted with a high flow safety valve (17.7 m3 / hour).
  • It is required to have a limiter blocking the filling at 80% of its capacity.
  • A gauge should indicate the level of gas remaining in the tank.

N European elm

  • The use of LPG fuel for the supply of household appliances has been authorized and regulated in France since April 1992 , the date of publication of the CFBP 107 prescription , supplementing the NF S 56200 standard , relating to the fitting out of campsites. cars.
    This prescription has been updated (under the reference R 6701) to be in accordance with European regulations.

French law (R67-01) requires that the LPG cylinder be permanently fixed, cannot be easily disassembled and in fact becomes a fixed tank.
To do this, I used a 5mm threaded rod ( Image 6 ) cut to the right length ( it depends on the holes already present in the floor of your trunk, or not ... ).
I used two ( impossible to put more, no access to the back of the trunk, very cramped ... ) and I kept my original strap ( Image 5 ), because the wall of the trunk in too thin wood did not allow a reliable and resistant fixing, the standard specifying that the fixing must withstand a shock of 20 G.
Efficient, I can no longer dismantle my bottle in less than ... pfouhhh, at least 30 minutes eh ...
It was already painful to install given the little space available ...

View of an anchor point on the ground of the bottle ...
Image 5
View of an anchor point on the ground of the bottle ...
Image 6

Evaluation of the gas level:

The bottle is, as I specified above, equipped with a level float as well as a pressure gauge. In this specific case, the level of liquefied gas is measured and not its pressure at the outlet of the bottle, a method which is too imprecise.
As I write, the " mountable mirror for 3 or 4 point LPG cylinders"( ref: GS067 ) allowing an" angle transmission "is not available.
Also, to control the level of my bottle, I simply use my Smartphone by taking a picture. Simple but effective, usable at night, not expensive and more the reading is not reversed ...
There are also remote electronic gauges( GS025klok ) but the price of this type of accessory is significant!
In this case ( Image 7 ), the bottle is full ( 80% full ) ...

reading the level indicator manometer ...
Image 7

There you have it, this is the end of my personal explanation ...
Good walks to all, best
regards, Philippe

Sources :

[1] The Gas Shop [ Edit of 10/22/19 : the site http://www.laboutiquedugaz.com/ apparently no longer exists]       but this site exists: https://www.laboutiquedugaz.fr/categorie-de-produit/ motorhome-and-van / LPG-cylinder / [2] Camping-Car-Webzine [3] Le Forum-Camping-Car.fr

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