Replies

1. 
   FredB | Mar 01, 2001 08:50pm | #1

   *
   Is there a fan somewhere in the radon vent pipe or system? If so what would the air flow be if anything partially or fully blocked the vent, like ice or snow in the winter?(don't know where you are).

   I've never heard of doing this but unless the above or unless the code prohibits joining can't think of why not. But, why even worry about it? Roof penetrations are no big deal. Millions done with nary a leak or a problem.

1. 
   kcoyner_ | Mar 02, 2001 12:03am | #2

   *What Fred said. I would keep plumbing vents seperate from other vents.

1. 
   ken_ballard | Mar 03, 2001 04:23am | #3

   *Hi FredB,The radon system will be passive, no fan. The junction of the two vents will be high enough so a fan can be added if it becomes necessary at a future date. There will be no ice/snow in the area.I also have never seen or heard of this being accomplished. Neither do I know if codes will allow, but why two when one will do.

1. 
   ken_ballard | Mar 03, 2001 04:33am | #4

   *Hi kcoyner,Thanks. See reply to FredB

1. 
   Bob_Walker | Mar 03, 2001 01:02pm | #5

   *Well, If I understand plumbing vents, they equalize the pressure in the waste lines when slugs of water etc are passing (dropping?) thru the waste lines, so you could be sucking air from the radon vents into the plumbing vents.OTOH, the air in the plumbing waste lines and vents isn't supposed to be able to get into the house because of the traps, so maybe no blood, no foul.As a home inspector, if I saw that (and correctly identified what was going on - tough to know what vents do what when you're up in the attic) I'd tell my client it was not a standard practice, indicating amateur workmanship (which implies higher risk) and that they should ask the owner to provide a certification from a plumber and radon mitigation specialist that the application meets all applicable requirements (or words to that effect.)Don't bother, IMHO

2. 
   ken_ballard | Mar 03, 2001 01:02pm | #6

   *
   Is there any problem joining the bath room vent [not bath room exhaust] pipe with the radon vent pipe in the attic in order to reduce the number of roof penetrations?