Spring Loaded Mechanical Vent

[Erik]

Trying to find Install guidelines for spring loaded Mechanical waste vents. IE. how far they must be placed from the main drain line.

Thanks,

Erik

[Scottpat]

Trying to find Install guidelines for spring loaded Mechanical waste vents. IE. how far they must be placed from the main drain line.

Thanks,

Erik

I know an AAV (Not the mechanical vent) should be installed 4"above the Wye or fixture drain on the line.

The mechanical vents are not approved for residental use. They are only approved for trailers and manufactured homes and should not be in a stick built home.

Mechanical vents are black and AAV's are white or tan.

[Richard Moore]

Mechanical vents are black and AAV's are white or tan.

While mostly true, there are some exceptions out there. Ayrlett, for one, makes a black ABS AAV. http://www.ayrlett.com/aav/products.html

[Scottpat]

Mechanical vents are black and AAV's are white or tan.

While mostly true, there are some exceptions out there. Ayrlett, for one, makes a black ABS AAV. http://www.ayrlett.com/aav/products.html

Thanks Richard, I did not know about those! As I have said before, I learn something new almost every single day!

Well so much for it being simple to say that the black ones are ones you don't use!

[Erik]

Thanks guys I got a call to investigate a strange odor in a very High priced home. found several sewer openings along with the spring load vent behind the wet bar.

On a side note nothing like supporting a ten foot by ten foot landing at the bottom of the steps with Two by fours and two low velocity power fasteners!