Putting inhibitor in header tank

[garyo]

On a vented central heating system, if I pour inhibitor directly into the header tank? Will gravity and thermal movement mix it in to the main system over a few weeks or is that unrealistic?

Thanks

 

[SandyLyon]

Think you’ve answered your own question.

Turn ball valve off (or tie up) part drain, add inhibitor, top up and run, that way you know it’s all in the system and not sat in the F & E tank

 

[DaveHerns]

Better to use a funnel and a bit of tubing to pour it into the f & e pipe

 

[Daveydub]

Better to use a funnel and a bit of tubing to pour it into the f & e pipe

That won't really work. Turn off & drain a rad, remove plug & vent, tip inhibitor in. Usually just screw a fitting in to form a funnel. Replace plug & vent, turn rad back on & vent, job done. Or as Sandylyon said.

 

[ReganAndCarter]

As above, any pouring of inhibitor into f&e tank will mean that it mostly stays in the tank. Funnel and tube down outlet in bottom of tank would only work if system is at least partly drained. Easiest to drain a rad and add through the plug in the top of rad if you have modern rads with large bleed plugs.

 

[DaveHerns]

Funnel and tube down outlet in bottom of tank would only work if system is at least partly drained.

Agreed. That's how I've done it.