On Wed, 17 Dec 2008 12:53:21 +0000, Stephen
wrote:

On Tue, 16 Dec 2008 21:13:58 +0000, wrote:

I have just looked under my bath to see how I did it ,probably with
the same waste . The drain fits in to the bath hole and iirc I used
some LSX sealant .The thing that covers the slots in the drain( Banjo
fitting) goes under the bath ,again using LSX,the black washer goes
next and the backnut last .The black washer I fitted is quite thin so
I don't recognise anything a few mill thick .Is there not a thinner
washer( or two) ? in the set .

I have had a closer look at the thick, rigid, washer. The hole is too
small to accept the waste, so it must be for the overflow. I assume it
is to be used as a spacer.

What I am not sure about looking at it is whether the "banjo" fitting
for the overflow has flanges top and bottom or whether I have put
washers above and below .

There seems to be a flange at the bottom but not at the top. Even so,
I'm not sure that the bottom would be watertight; what is to stop
water running down the threads? I think I will buy an extra washer so
that I can fit them above and below.
If you think about it the only way water will get to the threads is
from up above ( inside the bath) so the waste fitting should be
smeared with some form of sealant before you place it in to the hole
in the bath .
I guess if you turn the banjo fitting round the flange will then be
next to the bath so you can put the thin washer on the base of the
banjo then the backnut . Use LSX or similar sealant between banjo and
bath and between washer and banjo then screw the backnut up . I think
I used sealant on both ends of the overflow pipe as well just in case.
..

Obviously I don't want unscrew it to check .
I have a funny feeling that there was a solid washer that was supposed
to go at the back of the overflow

Yes, I think that's what it is for.

but I couldn't get it to tighten so
I cut out a round piece of rubber and fitted that to the back of the
overflow ( under the bath) and secured it with LSX then fitted the
backnut .It all sealed very well .

I didn't know that the part was called a banjo fitting.

It's a type of fitting used in some industries like car industry .I
think it's because of the shape . It's used to feed liquid from one
pipe along another pipe at right angles to the first .
Once I learned
that, I typed it into google. I found two sites that mentioned fitting
wastes, though they didn't help with what washer goes where. The
strange thing is that the text on the two sites was identical. Is this
plagiarism or is it one person trying to get double the audience with
the same material?

I am wondering whether in the future it might be better to get one of
those wastes where the overflow connects directly to the trap and
there is no need for banjos. Do you think they are any better/less
leaky?

Thanks,
Stephen.

Re your last point I've never used one of them .The other type ( the
type you have) should be ok but as I said you need to assemble it
carefully and use sealant.