LPG Autogas Filler Point


A brief run-down on rules governing the type and positioning of filler points;
1. Fillers can only be mounted on the outside of the car's body. * (See note at foot of page)

2. Fillers should be mounted horizontally (not facing upward) or pointing downward so that water and debris cannot collect in the orifice.

3. Recessed Box Fillers mounted in a body panel must be vented to atmosphere on the back face. * (See note at foot of page)

4. Only a 'fixed bayonet' type filler point can be fitted if LPGA (UK LPG ) certification is required.

5. Filler points should be at least 10" (250mm) from any exhaust tailpipe.

6. Fillers must be securely mounted. If mounted on a flexible bumper, that area will have to be reinforced.

Fixed Bayonet Filler

LPGA (UK LPG) regulations call for the use of fixed bayonet filler points which need no adapter for use in UK, effectively banning the use of adapter/filler arrangements.

The recommended Fixed Bayonet Filler (centre of picture) is mounted on a bracket fitted to the rear bumper on this car. This is one of the only positions that will conform to regulations but remain easy enough to use. A coil is put in the pipe to prevent it rupturing during a rear - end shunt, but even if it pipe where completely severed the multi valve would stop any significant (large scale) leakage. All that can happen in that case is the escape of pipe content since the last fill, rarely more than 30 or 40 millilitres.

NOTE that filler points have to be mounted no less than 250mm (10") from any part of the car's exhaust system. This means that cars with twin exhausts cannot have a filler mounted on either side of the rear bumper.

Towbar mounted Fixed Bayonet Filler

A fixed bayonet filler may be mounted on a towbar or bracket as shown in the picture on the left. This can be a neat solution and can be used with a filling pump on either side of the car.

Recessed Box mounted Filler

Here is another way of mounting the same 'fixed bayonet' filler point. It can look quite neat and is easier to reach but it does involve cutting a huge hole in the vehicle's body, something which we are not overly keen on doing!

Also note that there is a hidden disadvantage in having a filler mounted on one side of your car - You may have to wait to get to an LPG pump on the same side as your filler. If you have a rear mounted filler like the one on the bumper above, it is likely that you can use a pump from either side. This can be a great benefit on a tight garage forecourt.

Adapters for the fixed bayonet filler are available for filling up in other Countries. See Adapters

Filler Points - Potential Problems

Color 'coding' or matching to bodywork.

The type of plastic that is used to make the Recessed Filler box does not provide a good 'key' for paint. It doesn't matter how much the surface is abraded (sanded), nor what kind of paint is used, it will not stick properly. The addition of plasticiser to the paint is meant for application to a different type of plastic (that used to make bumpers etc.) and is not successful on a polypropelene filler cap. In addition, the plastic will expand and contract with temperature changes which will make the paint crack and seperate.

Go LPG are a professional company and do not offer things that cannot be delivered, hence we do not offer painting of this kind filler cap. It might be better to leave it plain black instead of ending up with it looking like this after 3 months or so.

The type of Filler Pump to avoid....

...if you have a recessed box filler.

The constant pull of the retractible safety cable can easily bend the bodywork around the filler point.

Corrosion of fittings on a vertically mounted Filler pointing upward

Here is a filler point that had been mounted vertically, pointing upward. Rain and car washing water had been going down the vent hose since installation, and when it blocked with debris the water stayed there. The outer filler cap does not stop water getting in and corrosion of this nature is inevitable.

Worse still, this connection was so badly corroded that it eventually resulted in a leak when the tank was filled.

This is the reasoning behind Rule 2 and explains our insistance on only horizontal or downward pointing filler mountings.


* It is not permitted to mount an LPG filler inside the boot, nor anywhere else inside the car.

This is because the gas released when removing the filler gun will sink to the lowest part of the body. It will stay there for months or even years (LPG vapour is heavier than Air).

Later, it could be that someone were to change a battery, connect up jump leads or make a spark in other ways and BOOM!

Many pleasure boats have been destroyed this way, any escaped gas will lurk in the bilges just waiting for a spark or flame.

The LPG filler MUST go on the outside of the vehicle.

* The above also shows why body mounted recessed box fillers must be vented at the back face.


Click here to return to FAQ choices


Contact us to arrange the conversion of your vehicle

(Link is currently available only when using Outlook Express browsers).

LP Gas burns cleanly.....

We accept Mastercard We accept Solo cards We accept Visa cards We accept Switch cards


Click here to get a quote for the conversion of your vehicle