Hey guys, So our full bathroom renovation was completed a few weeks ago and we only just started using the shower and it is not draining properly. It overflows/floods outside of the shower. Now I contacted the renovator about this and he doesn't want to know about it. He said it must be a pre-existing problem as all he replaced was the metal waste gate. My argument was that it was a full bathroom renovation, that if the plumbing was clogged it could have happened at any time during demolition/waterproofing/tiling etc. and even if it was pre-existing isn't it part of compliance to check everything works as it should? I would have thought at the very least they should test the drainage? On that note also, he only provided me with a compliance certificate for the shower screen installation. Should I have been provided one each by the plumber, waterproofing etc or is this covered when he provided me with the final tax invoice? I have opened up the drain waste tried to clear what little I can see and used some Easy Off Bam drain unblocker gel but still the same... Any help would be appreciated. Thanks!