Dudley concealed cistern, flushpipe conundrum.

[Deluks]

I'm replacing an older style Dudley concealed cistern with a newer Dudley 'Vantage'
I don't however have the correct flushpipe to pan, the old one is a standard type with washer and nut, the new one is supposed to be push fit onto a spigot at the bottom of the cistern. Because it's all tiled in I don't want to remove the old flushpipe, access is too tight, but instead want to convert the old flushpipe to fit the new cistern.

I have determined that a mcalpine 40mm compression makes a snug fit over the spigot of the cistern (with the comp. nut and washer removed) But how can I fit the to the old smaller flushpipe. I'm guessing a 40-32 straight will do it?

Here is the model, showing the spigot.

http://www.limelinebathrooms.co.uk/...ge-concealed-cistern-cw-oyster-push-plate.jpg

 

[keego]

Would a cistern with a standard flush pipe be a better option, maybe something like this
http://www.heatandplumb.com/acatalo...tm_source=ProductSearch&utm_medium=GoogleBase

 

[Deluks]

Sorted now.
The old cistern had a traditional backnut fitting so I assumed it was standard size flushpipe, but it was actually in the larger size anyway, so it did fit over the spigot!