Thank you for your inquiry about our project. The Onda Single Washplane sinks are fairly popular and did not result in any code issues. According to their website: To help achieve the minimalist look, Washplanes do not require a bottle trap or basin plug as they are supplied with the hardware and drainage system. This drainage system is installed into a cavity in the wall so it is completely hidden from the bathroom.

We hope that answers your question.

The Allen Construction Team