Funny nut

[Nozzle]

It's the same size as a Mini drum brake adjuster.. so go to ebay for drum brake adjustment tool. Don't use full leverage available to you though, hold the wrench part way along rather than right at the end
Nozzle

 

[durhamplumber]

Well true but every time I use one I "round-off" the nut.

Jeez...mole grips then....if that fails get some to do it for you.

 

[Harry Bloomfield]

It's the same size as a Mini drum brake adjuster.. so go to ebay for drum brake adjustment tool. Don't use full leverage available to you though, hold the wrench part way along rather than right at the end
Nozzle

Here? https://www.ebay.co.uk/sch/i.html?_...sc=0&_osacat=0&_odkw=drum+brake+adjuster+tool

I think I have one of those in my garage.

 

[Nozzle]

Yup, that one

 

[ianmcd]

that is what happens when the idiot that installed it never removed the innards before soldering it

 

[BoilerBob]

The most common cause. Bob