Waterless urinals problems

[Richplumber]

Hi all, I’ve just installed 2 waterless urinals, with brand new cartridges, however, they are draining extremely slowly, it’s takes around 10 minutes for 500ml to drain through the cartridge. Any advice? I’m sure I’ve done everything correctly

 

[ShaunCorbs]

You tried into a bucket ?

 

[Richplumber]

You tried into a bucket ?

Yep, had a bucket underneath the trap. Water just isn’t getting through the cartridge

 

[ShaunCorbs]

Tbh that’s stnd on waterless pots as all of the junk has to be absorbed