changing air vent on rad

[helptavner]

if i changed one would i need to turn off the rad on the valves (either side) if i didn't would i get loads of water from undoing it??? (if i did it quickly)

reason i ask as soon as i touch our valves they leak, so dont want to end up with another leak, and that would mean taking the cover of the valve, of which i wont be able to get a replacement

thanks

 

[RickMoore]

Yes turn the valves off or you will get loads of water flying out. It's worth draining some water off the rad as even with the valves off the water inside is still under pressure until it's relieved.