The question about how to attempt to fix a leak between the spout and
the body of a mono-bloc tap has already been addressed in this group.
I just did not do my home-work to try and find the answer before I
posted the question
I cut and paste from earlier question / response:
My kitchen sink mixer tap leaks where the "swan neck" joins the base.
Symptoms: When hot and cold taps are OFF, there is a very slow leak
from the joint where the swan neck joins the base.
Diagnosis: Water in the swan neck must be leaking back out.
What I did: Removed the swan neck and replaced rubber O rings in the 3
grooves of the neck joint.
Testing: Turn on cold. OK.
Turn on hot -- starts leaking *quickly* through the neck/base joint.
Turn off both -- leaks slowly as before.
Summary: I've replaced the O rings in the neck and the leak has got
much worse. I'm now totally fed up!
* Why does it leak if I turn on the hot tap, but not if I turn on the
cold tap. As far as I can see, both hot and cold enter at the base and
last up the swan neck.
* If I buy a new mixer tap set, could I just slot the new neck into
the old base?
* If I had to refit the whole tap set, is it a job for someone with
plumbing experience or is it possible to DIY?
Then this follow-up
I've managed to fix this. I put *two* O rings in the middle groove in
the neck. I used a really thin one + a normal size one.
And this for removing the neck / spout
I have just inherited an old kitchen set (10-15yrs) with a mixer tap
(dual feed) that is better than the one in my kitchen. I have renewed
washers OK but there seems to be an O ring on the centre outlet which
leaks. There is a screw behind the outlet which I have removed, but I
still can't pull it off (the screw seems to locate in a groove). There
is no make on the tap and the base seems completely cast with no
access. Are there any suggestions, such as giving it a big hammering!
The spout on my kitchen mixer tap has no screw or anything like that,
BUT, if you turn the spout till it is lying straight across the cold
tap, (the one on the left in my case) and then gently lift, it comes
out through a keyway quite easily and no force.