Step 1: Positioning the tap

The tap needs to be above the interior floor level, close to the rising main, and above the main stopcock. Ideally, it should be positioned over a drain grid or hardstanding and at a convenient height for filling cans and attaching hosepipes.
Situate the tap and mark the position of the wall plate holes on the wall. Then mark the position above it for the hole through the wall.
Tip: Check there are no electrical cables inside the wall at the drill points, and that there are no other obstructions between the hole and the rising main.

Step 2: Preparing the internal pipes

Close the stopcock and turn on the nearby taps to drain all water from the pipes.
The rising main will normally be 15mm or 22mm (0.6 or 0.9in) of copper piping. Any other types require specialist advice.
Remove a section of pipe and fit a T-connecter (either a compression or soldered type).
Add a small section of 15mm (0.6in) copper pipe, then fit a stop valve so you can isolate the tap in winter.
Install a further small length of pipe then fit a check valve to prevent siphoning back from the outside into the mains system (unless one is already built into the tap).
Fit a drain valve to ensure all the outside parts are completely drained of water when the system is turned off over winter.