Hello, complete amateur here..

I've just drained about one bucket full of water out of the central heating system in order to replace a valve. That bit done now (fingers crossed) but is it worth topping up the anti-corrosion scale inhibitor stuff as presumably I will have diluted it out a bit now? Maybe this isn't significant?
What say's you?
Cheers

Personally, I'd not bother as I doubt it would make a huge difference, but the professionals on here may advise otherwise.

If I'd had most the water out of the system, then I'd re-do it.

John.

No, dont bother.

Chip

Good news - ta!