Denray Posted July 7, 2015 Report Share Posted July 7, 2015 S-traps above and mechanical vents below. Bogus? Toilet drain with mechanical vent. Bogus? A tub drain had a m vent too. Click to Enlarge 61.56 KB Click to Enlarge 57.99 KB Click to Enlarge 70.35 KB Link to comment Share on other sites More sharing options...
kurt Posted July 7, 2015 Report Share Posted July 7, 2015 Bogii is the plural of bogus. You got some bogii there. Link to comment Share on other sites More sharing options...
inspector57 Posted July 7, 2015 Report Share Posted July 7, 2015 Those mechanical vents are totally OK to use... IF this is a MOBIL/Manufactured home. Otherwise it is no Bueno. Link to comment Share on other sites More sharing options...
Denray Posted July 7, 2015 Author Report Share Posted July 7, 2015 So, in a manufactured home they are set up properly???? Link to comment Share on other sites More sharing options...
Denray Posted July 7, 2015 Author Report Share Posted July 7, 2015 Thanks guys! [:-thumbu] Link to comment Share on other sites More sharing options...
John Kogel Posted July 7, 2015 Report Share Posted July 7, 2015 Yeah the one on the toilet is some kind of a joke. What's the word for bogus and redundant? Link to comment Share on other sites More sharing options...
Tom Raymond Posted July 7, 2015 Report Share Posted July 7, 2015 An AAV has to be above the flood level of the fixture it is connected to. These are all wrong, regardless of what code the dwelling falls under. Link to comment Share on other sites More sharing options...
Denray Posted July 7, 2015 Author Report Share Posted July 7, 2015 Found this: 918.4 Location. Individual and branch-type air admittance valves shall be located a minimum of 4 inches (102 mm) above the horizontal branch drain or fixture drain being vented. Stack-type air admittance valves shall be located not less than 6 inches (152 mm) above the flood level rim of the highest fixture being vented. The air admittance valve shall be located within the maximum developed length permitted for the vent. The air admittance valve shall be installed not less than 6 inches (152 mm) above insulation materials. Link to comment Share on other sites More sharing options...
Bill Kibbel Posted July 7, 2015 Report Share Posted July 7, 2015 An AAV has to be above the flood level of the fixture it is connected to. These are all wrong, regardless of what code the dwelling falls under. Around here 'A' Rated AAVs are permitted below the rim but must be 6" above the trap. Link to comment Share on other sites More sharing options...
mjr6550 Posted July 8, 2015 Report Share Posted July 8, 2015 An AAV has to be above the flood level of the fixture it is connected to. These are all wrong, regardless of what code the dwelling falls under. Around here 'A' Rated AAVs are permitted below the rim but must be 6" above the trap. Bill, I never heard of an A rated AAV. Is that an official designation? I thought that AAVs are AAVs and mechanical vents are not. Mechanical vents are only approved for manufactured homes and RVs. Link to comment Share on other sites More sharing options...
Bill Kibbel Posted July 8, 2015 Report Share Posted July 8, 2015 An AAV has to be above the flood level of the fixture it is connected to. These are all wrong, regardless of what code the dwelling falls under. Around here 'A' Rated AAVs are permitted below the rim but must be 6" above the trap. Bill, I never heard of an A rated AAV. Is that an official designation? I thought that AAVs are AAVs and mechanical vents are not. Mechanical vents are only approved for manufactured homes and RVs. I'm specifically referring to AAVs, not mechanical vents for mobile homes. Quality AAVs for branch drains or fixture drains are not required to terminate above the flood rim. Only stack AAVs need to be above the flood level rim of the highest fixture being vented. Link to comment Share on other sites More sharing options...
Denray Posted July 8, 2015 Author Report Share Posted July 8, 2015 What does stack venting mean? Link to comment Share on other sites More sharing options...
Bill Kibbel Posted July 8, 2015 Report Share Posted July 8, 2015 What does stack venting mean? Link to comment Share on other sites More sharing options...
Marc Posted July 8, 2015 Report Share Posted July 8, 2015 What does stack venting mean? That doesn't look right. Vent stack and soil stack both begin at the building drain at the bottom and rise above the roof deck. The difference is that the individual drains branch off only from the soil stack and the individual vents branch off only from the vent stack. I'm not saying the drawing is wrong, just that the terms used are in the wrong place. Vent stacks are rare here. Mostly what we have are combination soil/vent stacks. They don't need to be separate here. Marc Link to comment Share on other sites More sharing options...
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