What I'm Seeing Now


We All Have Gas, Which Needs Venting. Just Not Under The Kitchen Sink.

We all have gas, which needs venting.  Just not under the kitchen sink.

This is new construction, and a final walk through.

Looking under the kitchen sink I noticed the problem immediately.

Pointing under there I asked everyone present to have a look and tell me what was missing.

Nobody knew.*

The red arrow came later for the report, but shows you what was in question.

As the house has not really been used there was no residual odor.


This is missing the vent cap, a special cap called an AAV, or Air Admittance Valve.

This valve has special baffles which allows air in to vent the drain properly, but does not allow internal gases out.  Those gases typically vent out through the roof, but in this construction connecting to one of those was not possible, so they opted for the AAV instead. 

I know the builder was familiar with the AAV because I saw one on the wet bar sink elsewhere, and could show it to my clients.

It's a simple installation.

This is yet another example of how something will be handled later, and totally forgotten.

Well, it will be done now!

My recommendation:  again and again, on new construction, things needed to be done that had not been.  And there were many things on this house, as there are with many such new construction inspections!   When people ask me what kinds of things are "typically" found on these inspections, the answer is nothing is typical.  And everything is possible!  And yes, the county had approved the plumbing...

*  Buyers shouldn't have to know these things.  They trust the builder to provide a final product that is properly done and safe.  Don't think for a minute that new homes do not need to be inspected privately!



Jay Markanich Real Estate Inspections, LLC  

Based in Bristow, serving all of Northern Virginia.

Office (703) 330-6388   Cell (703) 585-7560


Comment balloon 4 commentsJay Markanich • May 18 2016 03:40AM


Too often people "assume" new construction is purrrrfect construction...things up to all the latest and greatest codes...and done absolutely correctly....ooops...you have shown us many time...it just is not true...and an inspection with a trusted inspector is a HUGE step to a better happily ever after !

Posted by Sally K. & David L. Hanson, WI Real Estate Agents - Luxury - Divorce (EXP Realty 414-525-0563) about 4 years ago

You are right Jay...buyers should not have to know these things...and that is why a good home inspector has to be checking in during the building project...another good catch.

Posted by Ginny Gorman, Homes for Sale in Southern RI and beyond (RI Real Estate Services ~ 401-529-7849~ RI Waterfront Real Estate) about 4 years ago

Good morning Jay. I am a fan of a home inspection on new construction. Over the years many overlooked items have been detected! Enjoy your day!

Posted by Wayne Martin, Real Estate Broker - Retired (Wayne M Martin) about 4 years ago

In some ways it's more important to get a Home Inspection on new construction than an older home. This is a good example of why. I had one once that had no insulation whatsoever... "overlooked"

Posted by Fred Hernden, CMI, Albuquerque area Master Inspector (Superior Home Inspections - Greater Albuquerque Area) about 4 years ago

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