wwhitney
In the Trades
Vent is required for proper function and code, 9' away is too far. Wayne
Definitely no reduction of drain size downstream of the p-trap. If you have an existing 1.5" drain you need to use, you must use a 1.5" p trap and reduce from 2" to 1.5" upstream of the trap.
Cheers, Wayne.
Exact model of the Kerdi drain you have? And type of pipe you are running between the Kerdi drain and the p-trap?The detail I find challenging is the Kerdi drain is not exactly 2”. It is more like 2 3/4”. (Approximately based on memory from earlier today).