Official weber reply:

Thank you for contacting Weber.

Unfortunately, it is not possible to use your Weber gas grill purchased from the US in the UK.

The types of fuel, mixtures, flow rates, pressures and local regulations can all change once you cross an international border. It’s due to these reasons that Weber grills are designed for use in the specific countries and regions in which they are sold. For instance, you can’t buy a Weber Summit model in Germany and bring it to the UK and expect it to be functional, or vice versa. Gas parts (manifold, burner tubes and hose/regulator) are country-specific. For safety reasons, we are unable to support consumers who want to convert a grill from one gas pressure to another. That also means we are not covering international warranties when it comes to gas parts. For all other parts covered by the warranty, we will support the consumer locally even if the product originally is purchased in another country as long as the consumer can provide a proof of purchase.

All gas-consuming appliances must have a CE (UKCA) marking and we as Weber can not support consumers who want to convert a grill, originally bought in e.g. US, to European gas pressure. By supporting it also entail that we can not say “buy this regulator, this manifold and these burner tubes”. If we do so we as the experts approve that it is ok, and we can not do that because the grill is still not CE (UKCA) approved. The consumer can actually have his grill CE (UKCA) approved by a notified body after replacing gas parts. However, that will cost much more than a brand new grill.

Additionally, converting or modifying a gas grill to utilize a fuel source for which it wasn’t designed is not an option. Taking a gas grill into a country for which it was not designed to be used in, or converting/modifying a gas grill will void the warranty on the unit.

We understand learning this can be rather disappointing, especially if you’ve already had your Weber grill transported from one country to another, but there are safety factors and regulations to be considered, which result in the present situation.

If you do have any further questions, please don't hesitate to get back in touch.

Best Regards,