What is included/excluded when I buy a geyser?

You get the geyser, with a drain valve(drain cock) and a TP valve (safety valve).

If the geyser is in the roof, you will need the following items:

• A geyser tray the\at fits the size of the geyser you buy.
• A pressure control valve that is rated to the same pressure of the geyser.
• Two vacuum breakers and the pipes and fittings you will use to connect the geyser to your plumbing system.
• You will also need an isolator switch and some wire for the electrical connection

If the geyser is to be installed on the wall outside, you will not need a geyser tray