Kit 2 Petrol Filters Fiat 500 Period NDFLR 126 and other Excellent Quality
The petrol filter of the Fiat 500 was not foreseen, therefore it is not in the original manual, not even some modern cars have it, they only have a micro filter on the tank outlet, which can be replaced in exceptional cases.
However, the filters that 500line offers help the fuel system and prevent any damage, sometimes caused by the walls of the pipe itself which release fragments, and being transparent, they also have the function of a visual indicator (see the flow of petrol).
In the kit there are two sizes but with the same connection diameter of 8mm (all petrol pipes), of which the first smaller one should be mounted about 10cm from the tank outlet as it must absolutely be visible and easy to access, since the space it doesn't allow it.
The second filter should be fitted before the petrol pump as explained in the photo, although we do not exclude the possibility that it may also be useful to install it between the pump and the carburettor as it could be useful for checking the passage of petrol: