| I am currently adding another 5 fish tanks to my filter system. I have
| borrowed a drill bit from a friend to drill the holes in the tanks, but it
| is only a 22mm bit, the other holes and fittings I have are 1.5"!! I went to
| a local DIY store yesterday and bought some toilet overflow connectors which
| 22mm rigid tubing fits in quite nicely. The problem lies in that I didn't
| realise the bore reduced to 20mm! I have tried the local plumbing stores and
| all say there is no such beast as a rigid 20mm pipe. Does anyone here know
| any different please?
What are you drilling through ?
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