Hi, I am stilling learning plumbing course. Lots of things need to learn. I have two questions to ask about the pic below. The pic was taken under a kitchen sink.
It’s a tailpiece and it looks like a funnel connected to a flexible something, not a pipe. So short answer is no. Where is this part of your plumbing course?
They sell corrugate (flexible drain pipe) drain pipe at the home centers and DIYers use it…
However drain pipes must be constructed of pipes with a smooth surface, you should be able to use it in the vent system.
You can use “corrugated pipe” in the vent system? I was always under the impression vents shall be of a smooth surface and graded?
These “pipes” are sold as “Emergency Repair Fixes” and are not “Code” approved for permanent use.
Agree with Bear… 
…especially the sound effect.
Fail: No Trap.
Thank you very much! it is very helpful to me.
I received a question about inspecting flexible accordion-type drain pipe installed at sinks during a home inspection. The code references that I found are:
2018 IRC P3002.3.1 Drainage
Successful gravity flow of wastewater (including graywater), requires smooth internal piping surfaces that do not impede flow. Drainage fittings shall have a smooth interior waterway of the same diameter as the piping served.
2018 IRC P3201.1 Design of traps.
Traps shall be of standard design, shall have smooth uniform internal waterways, shall be self-cleaning, and shall not have interior partitions except where integral with the fixture. A trap must have a pattern allowing unobstructed flow to the drain.
I would report, “I observed a flexible drain pipe at the sink. It is a defect that may cause clogging. It was not properly installed. I recommend correction and further evaluation by a qualified plumber.”
Careful… there are flexible pipes that have a smooth interior surface and are allegedly code approved. (Don’t quote me on that).
That’s all you need to say. You won’t find a NSF mark on a flexible trap.
Snappy trap uses deceptive practices on their website. They Claim “ UPC certification valid in all 50 states“. Does anyone know what that means? Does snappy trap understand that 75% of the United States does not follow the UPC plumbing codes?
If I see this garbage on my inspections I would call it out. Until they can prove it’s “IPC approved” it will not be approved by me.
