Comment by mattlondon

It is interesting that they don't have wheels but have like spokes legs? I presume that is to climb up and over lips between pipes and the like?

I have a mystery pipe in my house that no one knows where it goes, and they refuse to put a CCTV camera down it beyond a certain distance due to leaving the property. Tempting to DIY something like this... But I have a U-bend in the gulley to contend with first