Originally Posted By: Kevin McMahon This post was automatically imported from our archived forum.
Figure 1632 of the Carston Dunlop “The Illustrated Home” shows it acceptable to tap a condensate line above a trap at sink location.
Tough thing studying for an exam with new books with outdated information...but yet they keep selling them without updating....frustrating to read stuff on here, and it's not the same as in the books!
Originally Posted By: poffenberger This post was automatically imported from our archived forum.
These posts are just wonderful. If a person used tubing and was dumping directly into a plumbing stack, but used a 360 degree loop and then breeched the plumbing stack, would that be allowable
Originally Posted By: cbottger This post was automatically imported from our archived forum.
This is one of my pet peeves. Estimate that I write up more improperly
connected condensate drains than any other item concerning HVAC.
Jerry Peck was absolutely right must have an air gap cannot be hard piped into a drain or a stack regardless of installed P-trap or not. The reason for this is that the P-trap goes dry when running the furnace allowing sewer gas to enter the air stream into the home. Yes a copper line bent into a 360 degree loop connected to a plumbing stack would go dry when the furnace is operated also.
Another design that I do not like is a condensate line coming up into a
return air box on a slab floor that does not penetrate the top of the return box with a air gap out side of the return box. If the air gap is located inside of the return box with a installed P-trap in the slab this P-trap will go dry when the furnace is operated allowing sewer gas into the air stream.
P-traps installed in a slab floor even with an air gap in use can go dry over the winter months. What I recommend to my clients at the start of the heating season pour mineral oil or a deodorizer down the air gap to fill the trap, preferably a petroleum based product that does not evaporate.
– Don’t argue with an idiot someone watching may not be able to tell the difference.
Originally Posted By: poffenberger This post was automatically imported from our archived forum.
Mr.Charley.
Thank you so much for your input . I’ve seen the loop method used to aide in the smell of sewer gas often. and I agree with you. I’ve also seen floor traps dry out and emit an odor. nothing is said until a 65.00 service fee is paid ,and the plumber moves to his next job… so… why can’t a 360 degree loop be used on a A/C unit tubing drain be used… nothing personal just your thoughts please
Originally Posted By: cbottger This post was automatically imported from our archived forum.
Paul:
The 360 degree loop may be exceptable in your area as I have not seen then used in my area. My problem with them would be the same as a P-trap when there is not a continus supply of water to seal the loop or trap such as in the winter months as the A/C is not in use and there will be sewer gas. The exception that I am in favor of is the newer 90% efficient furnaces that makes condensate from the flue pipe and is discharged into the same line as the condensate from the A/C A-coil. The plumbers in my area are starting to connect this drain when the unit is installed horizontally in an attic to a plumbing stack with a P-trap installed between the unit and the stack.
– Don’t argue with an idiot someone watching may not be able to tell the difference.
