The above pic is a sketch of my situation. We are trying to sell our
house and the inspector recommended that the above drain scheme was
inadequate. We have had no problems, and the previous inspector (when
we bought to house) did not cite this as a problem. So what can I do
to fix this? My understanding is that the open trap in the crawl space
is the major issue. The Tee off of the PVC furnace vent is a barbed
hose connection that currently just drips into an open copper tube that
slips into the S trap in the crawl. My proposal to fix this is to
replace the copper with PVC that will be solvent welded to the S trap,
and reduced and sealed to the barbed Tee off of the furnace vent. The
top cleanout on the drain tee will also be capped. Thus the S trap
will not vent into the crawl, and will rather vent into the furnace
vent if needed. See the link below for my proposed fix.
Thanks for your help!
After some more thought, I believe that the following is more
appropriate, and easier. Instead of running the trap to the PVC
Furnace vent, simple extend the trap through the floor and add a floor
drain to the top, letting the condensate drip into the floor drain.
What do you all think?
Why not ask the inspector (who is probably clueless) what he wants done to
pass his inspection?
My personal solution would be to add a condensate pump and pump the
condensate outside the house to a rain water conductor.
Building codes are regularily changed and updated every few years.
What was once acceptable may no longer be.
In my state, the code stipulates one of three places for condensate
drainage: 1) the tail piece of a sink, 2) a roof or floor sink, or 3)
a dry well.
What do you think will happen when the water dries up in the trap that
is connected to your sewer line?? Sewer gas in the furnace room.
The trap at the a/c coil is meant to prevent air from being sucked
in or blown out (air leak) thru the drain line by the fan. It should
be deep enough to prevent the fan from blowing the water out
of the trap.
Any air vent should be down stream from the coils trap.
The condensate drain should have a 'air gap' when going to a floor
drain. (like your jpg)
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