Temporary Inhibitor?

[DanDare]

I've just drained and refilled my heating system - water only so far.

I've got to drain it down and do more work on it in 2-3 weeks time.

Should I add inhibitor? Or will a few weeks au naturel not do too much harm?
Thanks!

 

[ChrisR]

Mosts systems go for years with nothing in apart from old acidic flux residues.
WHen you drain down you can shut the rads to reduce water/ inhibitor loss and new oxygenated water input.