Repair mono bloc mixer tap

[Rosarius]

I have a mono mixer on a bathroom basin. It is about 150mm tall, cylindrical and with one of those turn and tilt single-lever top. It has stopped mixing (hot only now) and is difficult to shut i.e. Takes some jiggling to stop the flow.

I am reluctant to buy a replacement because it will be difficult to refit because of how the basin is fitted. I'd like to see if I can replace some interior part. My first question is: how do I open it?

Thanks,
R

 

[Charnwood]

It possibly needs a new cartridge.
Here are the installation and maintenance instructions for a Bristan Java single lever monobloc basin mixer, which sounds similar to what you've got.

 

[Rosarius]

Thanks for the reply. I thought it was something like a cartridge I needed. The tap you show however has a little Allen key grub screw holding the top on. My tap is a modern minimalist cylinder, with no obvious screw and nothing like a little platic decal hiding one. My problem then is how do I get the top off? The tap looks like this.

http://www.ajbh.co.uk/ekmps/shops/mwooly10/images/ebre-mono-basin-mixer-tap-c-w-puw-806-p.jpg

Thanks,
R

 

[Charnwood]

Have you had a GOOD look?
Try around the back of the head, parts 2 and 3:
View media item 40526

 

[Rosarius]

Have just looked again: nothing. The head can tilt back so it's not exactly like the one in the diagram, but no cap or grub screw. Maybe in the hole where the lever is screwed in. I'll try getting that out.

Thanks,
R

 

[Charnwood]

Have you tried just pulling it upwards? Might just be held on by friction or a rubber 'O' ring.

The head can tilt back so it's not exactly like the one in the diagram,

So does the Bristan Prism in the diagram.
The black version shows the angled rear of the cap which allows for said tilt.

View media item 40543

 

[Rosarius]

That looks very similar. I can't get the lever out despite trying with a pliers. I suppose I'll try lifting it up as you suggest. Obviously I'm worried that I will permanently wreck it. I'll let you know how it goes.

Thanks,
R