I have a wheelchair user so we are installing a floating kitchen bench where the waste trap below the sink is exposed. For aesthetic reasons we want this to be as shallow as possible. Where can I find regulations or can you advise regulations on what is required for a kitchen sink waste trap. I have seen "Shallow Traps" but they have a shallower depth of water seal - are there limits regulated here?
Or am I allowed a bathroom sink style bottle trap?
Alternatively can I have the sink waste go horizontally(slight incline) into cavity wall and then have p-trap in there? Any guidance or indication where I can get regulations for NSW much appreciated.
Hello,
Thanks for your question. We contacted Jeff Clark, Manager of Plumbing Standards and Water Services for the SA Government about your query. Please see his response below.
There are a number of manufactures that supply WaterMarked shallow traps that have the required water seal.
AS 2887 Plastic Waste Fittings requires the water seal of a waste trap to be 75mm plus or minus 5mm.
In addition bathroom sink bottle traps are not permitted to be installed in a kitchen sink. Kitchen sinks must have a 50mm trap connected to them. The Standard AS/NZS 3500.2 is for all states and not limited to NSW.