Onetap has given you sound advice.
The leak is UNDER the screed floor, with multiple further layers on top! You have no choice but to find and repair even if it means cutting away as little of the floor as possible
Or re route it either way you have some problems
Do check that is not at the meter the smallest of leak will smell but is some times not detected
The leak is UNDER the screed floor, with multiple further layers on top! You have no choice but to find and repair even if it means cutting away as little of the floor as possible
Or re route it either way you have some problems
Do check that is not at the meter the smallest of leak will smell but is some times not detected