Toilet waste lower than soil pipe

[HLuc]

All I can say about that soldering is WOW!!!

Why?! Is it just the flux problem?

 

[Trotter31]

Why?! Is it just the flux problem?

Also a little bit OTT on the solder.
Makes for a very ugly job.
(Teachers Note) Could do better!!!

 

[Rob876]

Is it on ground floor? My nephew had a nasty call back to a ground floor toilet install he'd done with flexi connector, poo and wee had been leaking out since he installed it (he did a top job by the way) because rats decided to run up the pipe and chew a hole in the flexi, worth remembering that one.