Recommended kitchen sink pipe gradient?

[MJNewton]

AD Part H mandates a slope of between 18 and 90mm/m for 40mm sink waste pipes... How is a man with OCD tendencies like me to cope with such freedom of choice?! Presumably more is better? In this particular case the run length is probably only going to be ~1m so perhaps it matters even less, or does it?

 

(It's no wonder my extension is taking so long - I don't half dwell on minor details)

Edited March 5, 2020 by MJNewton

[Russell griffiths]

As long as it doesn’t slope up hill it will be fine

get on with it will ya, I need you to come and guide me through all this cat 5-6 cabling stuff. 

[MJNewton]

?

 

Happy to come over re the cabling. Probably worth a post on here for Ideas?