Small leak from bathroom mixer tap. How do I get at it to fix it??

[Russdl]

Looks like I’ve had a very slow leak from a bathroom mixer tap for a while and apparently all I need to do to stop it is tighten the brass nut behind the domed cover plate. The domed cover plate screws off, well it would unscrew if the corrosion (red arrow) didn’t have such a death grip on it. 
 

Any idea how I can break the corrosions grip on the domed piece without causing any more damage (yellow arrow) than I already have. The domed piece is very thin.  
 

 

[Russell griffiths]

Pair of multi grips wrapped in a rag

put the grips hard up against the shoulder where it’s stronger. 

[Marvin]

What's this! Today's challange!!

 

Hi @Russdl

 

Yup @Russell griffiths Idea will do it, however sometimes multi grips not big enough so another choice:

 

 

 

 

[Russdl]

Thanks both, I’ll give those ideas a go later and award a prize to the winner 👍🏻

[Russdl]

No prizes to be awarded. 
 

I can’t get grips in deep enough to get hold of anything substantial and the domed thing is way to domed for Marvin’s plan to work. 
 

The domed piece is on its last legs now but the injuries are invisible when the tap lever is in place. I gave the manufacturer a call and hopefully they’ll send me a new dome thingamajig so that I can cheerfully destroy the stuck one in my efforts to remove it. 

[joe90]

1 hour ago, Russdl said:

award a prize to the winner

https://www.ebay.co.uk/itm/314963947746?chn=ps&_ul=GB&_

[Russdl]

Thanks @joe90 but that’s just a posh version of Marvin’s idea and it would just slip of the domed thing. It’s actually not dissimilar in size and shape to the bottom half of an egg. 

[Russdl]

Success!!

 

I’ve got the dome thingy off 😃

 

I’m not sure if it will go back on again though, it didn’t come off without a fight. 
 

 

We have two of these taps, here’s the dome thingy from the other tap, the one that isn’t leaking. Incredibly thin material. 
 

 

And I’m delighted to say that the manufacturer is going to pop a new one in the post. I’ll keep a closer look out for a slow leak this time around. 
 

Edited December 12 by Russdl
Added the egg