Good the picture came through.


"gary" wrote in message
news:Wkmff.527398$1i.336885@pd7tw2no...
New bathroom fan install with "trap"

"gary" wrote in message
news:j6bff.524440$1i.262605@pd7tw2no...
That is done on all new buildings here. I just took a picture of one
today.
Can I upload binaries here? Do you really think a slight U in a 4" pipe
is
going to fill up with water from the minimal amount of snow or rain that
might get into the pipe? If you get that much water in there the trap is
NOT your problem. You have other problems. If you do not put the
"trap"
there where do you think that water goes. Right into your fan, your
motor
and your grill (if metal) and causes rust.


"Dennis" wrote in message
newsP9ff.22603$5R4.2331@trnddc06...
Your kidding right? Trap the duct?

"gary" wrote in message
newslRef.522479$tl2.34263@pd7tw3no...
Use insulate flex ducting to prevent moisture condensation and put a U
in
it so that any water that might get in the pipe through the top of the
vent does not drain back into your fan.