New Drain for HVAC Condensate Pump
So, we recently purchased a whole house humidifer, an Aprilaire 600A. Realizing that our sewer main line runs over-head in the basement, our only choice for the constant flow from this humidifer that produces approx 2.25 gallons per hour of flow when running, the only choice we have is to have the unit drain into the condensate pump from the HVAC system. Of course in the summer this is not a problem, but in the winter when the humidifer is intended to run, freezing is an obvious problem that would lead to water on my basement floor. There are no floor drains anywhere in my basement leading to a sump pump or any other means of discharging the water in question.
What I'd like to do is create a new 1.5" branch off of the main 3" line running over head. Due to space limitations, I would have to run this line approx 4' before putting a trap in the line. I'm fairly confident in my ability to handle this task, but the more important question I'm hoping for help on is if this new branch would specifically need to be vented as well as the ONLY purpose this drain will serve is for the condensate pump which will discharge into the drain via a 3/8" vinyl hose, thus limiting the potential for a hugh wave of waste at any time.
Unfortunately, in the area of my basement in question, there are simply no other options for draining into the sewer main as all branches off of the main are in areas of the finished part of the basement with drywall ceilings...
Any help or advise anyone could offer is greatly appreciated!
Thanks in advance!