Draining, capping off & removing a one pipe system.

[Swell1]

Hello, we have a combi boiler and a one pipe system.
I plan to drain the system inorder to remove all rads and pipes as all pipes are on the skirting right around the bungalow and replace with a 2 pipe system and new rads in new locations.
I wanted to see if I could save some money and do the first part (removal) myself as we are fine without heating.
I plan to turn off the water, drain the system from the drain valve I can see on the pipe, then chop the flow and return pipes in the loft (with a bucket under them) and fit an end cap on each pipe then remove everything?
Is this basically it?
Any advice/tips appreciated.
Many thanks

 

[muggles]

Make & model of boiler? Some combi boilers need the system to be filled in order to generate hot water

 

[Swell1]

Ahh sorry it's a Worcester Greenstar 28i Junior.

Many thanks

 

[muggles]

You'll need to have pressure in the heating circuit for that to generate hot water, so you'll need at least one radiator connected and a filling loop. They overheat quite easily so you also need to make sure the heat exchanger is properly vented before firing it up again