Option 1 – Secondary drain pan with piping terminating in observable location Also, there is a requirement to provide secondary drain piping to a point of termination that would provide notification to the occupants that there is a leak, such as terminating above a window or doorway. This would hang below the Air Conditioning unit in case the A/C units primary pan overflowed. Option 1 – Secondary drain pan with drain piping.Below are some possible solutions, but as always check your local code for the approved method. If the Air Conditioner is suspended above an inaccessible ceiling, such as a gypsum board ceiling or attic space then you will need to provide a means for protecting the building elements from the overflow of the primary drain and for indicating that there is a leak.Īlso, drain pans that are poorly drained can cause water to stay in the pan risking the possibility of algae and bacteria growth. Condensate drain piping to slope a minimum of 1/8″ per every 12″ horizontal Attics or Furred Spaces Slope to be at least 1/8” per foot or 1 percent, that is for every 12” horizontally there must be at least an 1/8” drop vertically. Minimum Condensate Drain Pipe Sizing Chart If the outlet size of the equipment’s condensate drain is larger than what’s shown in this chart then your required to use the larger outlet size. Enclosed you will find the requirements for many local codes, but be sure to check your code for your local requirements. The size required for the condensate pipe is dictated by the local code. If you prefer to watch our YouTube version of this presentation, scroll to the bottom. We’ll be glad to come out and take a look at the issue.ġ431-183 A/C & Heating proudly serves Round Rock, Georgetown, Cedar Park, Pflugerville, Leander, Liberty Hill, and North Austin.The proper sizing and layout of condensate drain lines is important for the protection of property and for the proper functioning of the air conditioning equipment. If you are experiencing a problem with your air conditioning or heating call us at 51 to schedule an appointment. As a result, you’ll have to run your AC system for a longer period to achieve a comfortable environment. When there’s a lot of moisture vapor present in the air, your home will feel warmer than what it really is. The AC drain line can even improve the performance of your home’s AC system. The AC drain line will help control the humidity level inside your home by flushing condensation to your home’s exterior. If your home has wood floors, it can damage them. High humidity may also contribute to the decay of wood. Fungi such as mold and mildew thrive in humid environments. With a high humidity level, you may discover mold and mildew growing on walls. Allowing moisture vapor to go unchecked, though, can lead to several problems. Humidity Controlīecause it flushes condensation, an AC drain line can control the humidity level inside your home.Įven though you can’t see it, there’s always at least some moisture vapor in the air. Rather than allowing this condensation to accumulate, AC systems are designed with a drain line to flush it. When warm air travels over the cold refrigerant-filled fins, the evaporator coil will produce condensation. The evaporator coil contains refrigerant. When you use your home’s AC system, the evaporator coil will produce condensation. The main purpose of an AC drain line is to flush the condensation generated by your AC system’s evaporator coil. At the bottom of the drain pan is one end of the drain line, which connects to your home’s exterior. The drain pan catches the condensation as it drips down from the evaporator coil. Regardless, they all consist of hollow tubing that connects to the outside of your home.ĪC drain lines work in conjunction with a drain pan. Some AC drain lines are made of PVC, whereas others are made of metal. What’s the purpose of an AC drain line exactly? The Basics of an AC Drain LineĪlso known as a condensate line, an AC drain line is a piece of hollow tubing that begins below or around the evaporator coil and runs to the exterior of your home. It typically runs from the evaporator coil to the exterior of your home. There’s another part, however, that plays a key role in the functionality of an AC system: the drain line. Traditional split-system AC systems contain a variety of parts, the three most important being an evaporator coil, a condenser coil, and an air handler.
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