Sime gas pipework can be separated into 2 categories. The first would be the pipework that is external to the appliance and is connected to the wall jig which allows gas to flow in. The second category would be any pipework within your unit that transports the gas to, from, and between the different mechanisms within the boiler that require it.
Fits multiple appliances
Technical specification
Waist Sizeac62ci94gsToilet Cistern CapacityFTW--Supplier Part Number6264748Brand NameSime