Slackening hot water nut - will i get a dribble?

[jacobball]

Hi all

I am going to slacken a nut at my hot water cylinder (primary flow connection) to try and shift some air that has made its way into the system and I can seem to ****. Have tried venting everything!!

I have read that this is OK on this site, but if i do this when tre-tightening will i get a leak or slight dribble? If so how can i overcome this.

Just want to be sure ....

Thanks for your help.

 

[steved101]

You may do if the nut is very old and stiff when loosening. Should be OK though. Have an old cloth/towel ready when loosening.