Plastic pipe to basin connection

[Alex996]

Hello, everyone,

Would anyone help me with advice please? I'm replacing old basin in bathroom and have got new taps with standard flexible 15mm lead. On the other end I have a plastic tube which if measured with ruler give 10mm.

I bought two different brass reducing couplers. One 10mm x 15mm and another 12mm x 15 mm. The tap tube fits ok (15mm), but the plastic tube does not fit any of those two couplers. 10mm is too tight and 12mm is too loose. Is it possible that the tube is 11mm? Looks very non-standard to me.

I have some pictures.

http://tinypic.com/view.php?pic=n12hvl&s=8#.VI24GCtXcxU
http://tinypic.com/r/2zf34ba/8
http://tinypic.com/r/27yztw2/8

12mm is so loose that the whole tube can go through the coupler.
As for 10mm neither olive nor nut can fit the tube without applying some force and in that case the coupler just removes this extra mm of layer, which does not look to me right.

I see that there's 10mm plastic tube is popular on the market. Which compression fitting could fit 10mm if 10mm is too tight and 12mm is too loose?

 

[avonmouth]

The problem might be that you need to put the olive on before you insert the insert ?

 

[avonmouth]

nut and olive i meant.

 

[Alex996]

The problem might be that you need to put the olive on before you insert the insert ?

Does not look that way, I'm afraid. The insert does not make the tube thicker or at least not that much thicker.

 

[avonmouth]

Are you saying that what you think is 10mm tube is too small for the 10mm fitting ?

 

[Alex996]

Are you saying that what you think is 10mm tube is too small for the 10mm fitting ?

It's difficult to tell / measure exactly that the tube is 10mm (I used just a ruler). It might be 10.5mm for example. But I haven't found 10.5 mm tubes on the market, so assumed it's indeed 10mm. But 10mm fitting (nut and olive) is a bit too small for this tube.

I thought maybe there's some trick I can't see...otherwise it should be very easy to use, this fitting.