How To Make Condensating P Trap On Roof Top Unit

The overall height of the trap should.

How to make condensating p trap on roof top unit.

Since the drain is on the return side of the ducting the bower will suck lots of air in through. I have a forced air furnace air handler in my basement with a standard a c unit condenser out side a c coil in the main supply truck about a couple inches over the furnace air handler. P traps have to be installed on a suction system so a p trap was added. Another key component of a p trap is an air vent the air vent prevents the drain that comes after the p trap from siphoning the water in the trap out.

It coats the pan p trap and drain piping with a lubricative film to improve flow and prevent future soil adhesion. Trap failures due to freeze up drying out breakage blockage and or improper installation can compromise the seal against air ingestion through the condensate drain line. Here is our finished product. The important dimensions for a p trap are that the exit point of the trap is 4 to 6 inches lower than the entrance point.

The condensate line comes out of the main trunk and runs to the floor just above the drain near the furnace. This includes rooftop units. Traps with insufficient height between the inlet and outlet design deficiency on draw through systems can cause the drain to back up when the fan is on possibly causing drain pan overflow or water droplet carryover into. Do you know the proper way to size a p trap on an hvac unit.

Been looking at some posts around here and notice a lot of mention of p traps for a c condensate lines. This video is to demonstrate the necessity of a trap on a rooftop furnace and air conditioner unit. The slow dissolving enzyme gel will outperform and outlast conventional tablets and strips.