Kitchen Sink Drain Problem

[SteveF]

I put in a new Kraus SS single drain sink this summer and used a Snappy Drain instead of a traditional plastic trap. The problem I'm having is the sink drains slowly MOST of the time. It doesn't do it all the time but most of the time. Has anyone had this issue and particularly had it with Snappy Traps?

 

[breplum]

Snap answers: Use normal plumbing/ Use smooth tubular as a rebuild and tell us what you discern. Those funky corrugated things accumulate sludge and are not to code anywhere in the U.S.