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Plumbing tees showing right way and wrong way to install a tee in a vertical vent line (C) InspectApedia.comPlumbing Vent Definitions & Code Q&A#2
FAQs on plumbing vents & codes

Plumbing vent and vent code questions and answers set #3.

This article series defines plumbing vent system terms, distances, and functions, and other specifications and code requirements.

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Q&A on Plumbing Vent Terms, Definitions, & Types

Plumbing vent for toilet - specifications (C) InspectApedia.com Megan R These questions and answers about plumbing vent codes and definitions were posted originally at PLUMBING VENT CODES, DEFINITIONS, TYPES - home - be sure to check that ARTICLE INDEX and advice.

The basic plumbing vent terms are shown in the sketch at above/left. In these notes, the plumbing stack vents and other sketches included below are provided courtesy of Carson Dunlop Associates, a Toronto home inspection, education & report writing tool company [ carsondunlop.com ].

[Click to enlarge any image]

On 2019-03-28 by (mod) - The horizontal vent system must have a Forty-five degree take off on the vent before the toilet of the wye

Thanks for the comments and help, anon.

On 2019-03-27 by Anonymous

@megan,
not where I'm from. The horizontal vent system must have a Forty-five degree take off on the vent before the toilet of the wye. The wye is good but it needs a 45 fitting up on a 45-degree angle

On 2019-03-27 by Megan r

sorry just one more question!!
is the drain/vent for the toilet with the y connection ok? the last pic I sent

On 2019-03-26 by (mod) -

Yep. It's frustrating when a code official says "something's wrong, you must fix it" but won't tell you enough to find and fix the issue. I'd press for clarification.

On 2019-03-26 by Megan

thanks so much for the information.. I know we have to redo the sink ones to be closer to the p-traps. Still not sure what he means about backwards though..
thanks again!!

On 2019-03-26 by (mod) -

Thanks Megan, the photos clarify the situation.

Details about Studor Vents® / AAVs (Air Admittance Valves) are found at AIR ADMITTANCE VALVES AAVs

https://inspectapedia.com/plumbing/Air_Admittance_Studor_Vents.php

On 2019-03-26 by megan

this is the toilet vent, it is on a y from the drain.. there is a giant support beam right behind the toilet so we had to run it this way..

On 2019-03-26 by Megan

double vanity

On 2019-03-26 by Megan

kitchen

On 2019-03-26 by Megan

this is the inline vent for the other shower.. the inline vents for the kitchen sink and bathroom double sink needs to be installed in the vanities.

On 2019-03-26 by (mod) -

those look right to me, too. I'd also like to see the "wrongly-installed" inline vents

On 2019-03-26 by Megan

more pics..

On 2019-03-26 by Megan

Here are the pics of our plumbing,,
I really cant see anywhere that the venting piping is backwards. We have some inline vents that I know we installed wrong and need to redo.. but the other venting connections look right to me.

On 2019-03-23 by Megan

great thanks.. it is a second home-cottage, will get picks when there next week and post. thanks!

On 2019-03-23 by (mod) - Upside down plumbing vent tee connections:

Megan,


RE: Upside down plumbing vent tee connections:

I cannot give an accurate guess at exactly what's wrong where from your question. Follow the vent piping, locate all joints, connections, tees, photograph them, and post photos here or ask the inspector to be more specific if some but not all connections were improper.

Our illustration shows the proper as well as an "upside down" position of a plumbing vent tee.

Note that if the tee, seen at the vertical plumbing vent riser, were upside down, water would be trapped in the horizontal piping, ultimately inviting clogs.

Use the "add Image" button (one per comment) and post photos of your plumbing drain and vent piping tee connections and we can comment further.


On 2019-03-23 by Megan

we had a plumbing inspection where he stated: Plumbing Venting tees - installed backwards.

he gave no indication where or how many.. or will answer calls for questions..

we are a homeowner doing our own work, so just trying to narrow it down. From this can you help identify if at least..

1. it is going to be on a vent stack

2. it is going to be associated with an inline vent installation

3. what does "backwards" mean?

upside down,

using wrong piece..?

any help would be appreciated!


...

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