You simply launch the installer by double clicking on the file that you downloaded to your computer.
You may have to get a qualified locksmith or the installer to fit locks to replacement PVCu or metal frame windows.
The family consists of a double solvent socket, solvent socket spigot and push-fit socket spigot versions to suit any application or installer preference.
If you don't have the knowledge or time, calling a professional installer can be worth your time and money.
If there are no leaks the tank is filled and the installer lights all necessary pilot lights and makes sure that all appliances are in proper working order.