what size blank nut for radiator

longwalks1

I need to remove a radiator to decorate behind it, strip wallpaper off and get it plastered so it'll be off the wall for a week or more, want to blank off the pipes, what size blanking caps will I need please?   1/2" BSP or 3/4" BSP?

EssexExile

Surely you just turn off the valves at each end?

jefaz07

britishboy said:

I need to remove a radiator to decorate behind it, strip wallpaper off and get it plastered so it'll be off the wall for a week or more, want to blank off the pipes, what size blanking caps will I need please?   1/2" BSP or 3/4" BSP?

You can get both 1/2 and 3/4 so can’t tell you without seeing. 

But as mentioned, why do you need them? Just turn the valves off. 

longwalks1

just wanted to be extra safe, if you think not needed then ill just turn the valves right off?  (always worry about a flood)

452

britishboy said:

just wanted to be extra safe, if you think not needed then ill just turn the valves right off?  (always worry about a flood)

You'll not know for sure whether you need them or not until the rad is off. 

nofoollikeold

If the immediate connection from valve to radiator tail is a compression nut, you would need 1/2" BSP stop ends.
If the connection is flange to flange, you would need a 3/4 BSP blanking cap.

longwalks1

Thanks all, am going to bag the ends up too so the plasterer doesnt cover them in muck this weekend

Last question (I promise), if im going to be leaving the radiator off for about a week (drying time plus decorating time), can i just leave it rested against a wall upside down to prevent spilling any water? Or is there a preferred way to store it? Someone at work mentioned not exposing it to the elements for too long in case it oxidises???

Kiran

Corrosion requires moisture and air. If you leave the rad off upside down its going to be exposed to both. Personally Id empty the rad out but that's just because its lighter to move and you can't spill rad water everywhere.

It's also a good time to give it a flush out