Drain System - Grant Vortex 15-21

23 Apr 2023
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Hello, I have a bungalow heated by a Grant Vortex 15-21 external oil burner. I'm working on a loft conversion and need to branch into the existing boiler supply and return pipes in order to feed some new pipework into the loft for radiators to be installed at a later date. I've looked around but can't find any radiators on the ground floor with a drain valve so I'm guessing that I'll need to open the boiler up to drain from there. Am I thinking along the correct lines here, I've done some basic plumbing around the house but never anything like draining an entire heating system.

Any help or guidance would be greatly appreciated.
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Drain off on left hand front of boiler on some of smaller models you have to take burner out to easily access drain cock.
Thanks, I assume this is it? Seems I'd have to remove the burner to get proper access
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