On 14-Feb-18 11:33 AM, wrote:
I'm about to update my dust extraction system and would prefer to use
clear pipe, rather than soil pipe, so I can see any hang-ups or
blockages - are there any sources of 1 or 2 m lengths at a reasonable
price?

The two cheapest options are clear rigid PVC or extruded acrylic, but
they are both a lot more expensive than grey or brown PVC. Probably
around £50 for a 2-2.5m length of 110mm diameter.

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Colin Bignell