On Thu, 20 Jul 2006 18:06:53 +0100, Al Deveron
wrote:

On Thu, 20 Jul 2006 15:05:29 +0100, Al Deveron
wrote:

Update:
I just tried sticking it in with Superglue. It formed an incredibly
strong joint (much stronger than Araldite did). I just hope that the
2-stroke fuel won't weaken it.

If it is PP and superglue comes unstuck, have a look at this guide:

http://www.loctite.us/int_henkel/loctite_us/index.cfm?&pageid=151&layout=2

It recommends Loctite 770 as an activator, which *appears to be*
basically n-heptane:

http://www.bmed.mcgill.ca/dept_resources/machine_shop/miscellaneous/msds/Loctite%20770%20Primer%20Prism.pdf

Some superglue activators use it so it might be worth trying one out
on something made of PP, eg some ice cream tubs.

Another approach...

If the tap and tank *are* the same plastic and will soften and melt
with heat, another way to go could be to wind a coil of resistance
wire round the tap, put it in the tank and put a current through the
wire so it heats up and fuses the tap to the tank well. Once the
plastic is melted twisting the tap a little back and forth may help
this.

cheers,
Pete.