‘Missing’ U Bend

Hi all

Mate of mine recently had a new kitchen sink fitted and some pipework/drainage alterations. Work was carried out by a handyman type person

My mate provided the sink and B&Q bag of fittings (pack A)

I’ve used these fittings before and realise that you get a whole jumble of fittings, some you use and some you don’t - just depends on waste run. Unused bits were left under the sink

It’s just that the U bend in the bag hasn’t been used and just a 90 degree fitting screwed directly to sink waste

Work looks neat, solvent weld waste used, no leaks and pleasant chap, according to my mate - just I thought the U bend provides a water trap to prevent smells coming up through sink and also a ‘sump’ for debris to collect in

Waste pipe exits outside wall and sits a few inches above drain grid, also pipes for washing machine and gutter downpipe are here

Is this ok or not - I’m thinking not but ...... see photo...... thanks

 

Thanks guys for all the input, just confirmed my thoughts that the U bend should have been used, or an alternative trap used (as suggested)

Pipes are 40mm, pretty standard kitchen waste set up

I can only guess that as most of the waste pipe is what was there with the previous sink, the new sink and supplied U bend didn’t line up but that 90 bend did so - took the short route the cheeky monkey

Thanks again