Grey waste water outlet size?

[our poppy llll]

It’s raining, I don’t want to crawl under the van with a tape measure, in this weather does anyone know the size of the waste pipe extension I need for a swift Kontiki 794.
Thanks in advance for any help.

 

[rosalan]

Sorry, you may have to wait for the sunshine, as I do not want to get wet either.

 

[faraway]

If you get the Colapz pipe extension, it fits numerous sizes.

Flexi Waste Pipe Single Adaptor

This product will make your travelling life easier and who doesn't want that! Extremely sturdy and easy to get the correct distance for your needs. East to store too.

colapz.co.uk

 

[landranger]

I know you asked this yesterday, but, just on case it hasn't stopped raining yet......

This is what I use to drain the tanks on our Swift Kon-Tiki. The number you can see DN 32-67.5° refer to the size of the pipe and the angle of the bend, so I'd work with an external diameter of 32mm on the drain down valves.

Something like this https://www.screwfix.com/p/floplast-push-fit-90-conversion-bend-black-90-32mm/96238 should work as a starter.