What is a condensate drain line in central air units? A condensate drain is just a pipe that removes water from the evaporator coils. The drain pan or the evaporator pan is located underneath the evaporator coil. Should you install a trap in your condensate drain line? Yes, installing a p-trap to your condensate drain allows the condensate water to flow freely. Without the p- trap installs, the air handler negative pressure will pull in the positive pressure air, this prevents condensate water from flowing. There is two or one condensate drain pan in central air unitsThe number of drain pan in central air units are depending on the location of the air handler unit. Air handler unit in the ATTICWhen the evaporator coil and drain are located in the attic, it is recommended or required by local code to have two condensate drains. The first drain pan is the known as primary drain pan and the secondary drain pan is known as the auxiliary drain pan. The primary drain pan is within the air handler;

it is underneath the evaporator coil. The secondary drain pan is located beneath the air handler; it is not within the close compartment. It purposes is to tell you the first primary drain pan is clog and you need to fix it. It will be drain in a place that is visual; it is a sign of warning to the homeowner. When an air handler in the basement; it does not required to have an auxiliary drain pan. Where is the condensate drain line on the furnace? A package unit on top of the roof needs to be drain purposely if it is outside; it is not a big deal. In split central air conditioner, the drain line is in the basement or in the attic. Look for a tube that travels from the air handler to outside. The tube could be white colored PVC pipe with P-trap. Some air handler unit will have a condensate pump to help move the water if gravity does not apply. How to install a condensate drain in central air units? Condensate Drain Pump in Furnace UnitDo I need condensate drain pump?If the condensate needs to pump a drain at higher level, it needs the condensate pump.

Condensate pump is useful when gravity is useless.Condensate pump will have a float to turn the pump on and some pump will have second float and safety switch to turn the central air units off, if the first float fails. How much water does a central ac unit produce?Each ton of central air conditioning in a climate with average humidity will produce 48 ounce of liquid (3 pints) per hour of operation. A 4 ton central air conditioner unit will condense about 64 ounce of liquid (12 pints) per hour of operation. energy credit for ac unitThe evaporator is removing more than a gallon of moisture per hour. air conditioning units in canadaHere is another way to determine how much water your central air units are producing, place a measurable container underneath the condensate outlet of your furnace and see how much it fill the container. ac unit not holding charge

Should I drink the condensate water?You should not drink the condensate water; however, it is useful for your garden or grass. What causes condensate water to leak? Leaks will occur when the evaporator coil drain line becomes clog. Some central air unit will not have float switch at the pan to tell the central ac unit when the evaporator pan overflow with condensate water. That is when the leak becomes visual. Clogs condensate line can be caused by attic insulator, insect and airborne particle, such a pollen and dust. Algae build up in the lines, trap, and pans will clog the drain line. Drain pan can fails – overprotects it by Air handler does have secondary drain pan to protect the sheetrock. The primary and secondary drain line could clog and it will cause mess. The best solution is to install drain pan switch to turn off the condenser unit, whenever the secondary pan water level rises. It low voltage and expensive safety switch connection. The drain pan switch will be wire through the condenser unit.

Ask hvac technicians to install it, if you have air handler in the attic. Condensate drain line needs maintenanceThe drain line needs periodic flushing to prevent algae build up and other growth substance. The Ac maintenance should be done by you or by your service HVAC company during annual maintenance or system tune up. If you evaporator coil is in the attic, do not put this off. Flushing the drain line is serious work and it need to be done annual or you face financial problem. You can pour 1/2 cup of bleach into the condensate line once or twice a years. This is the best way to eliminate unwanted sticky material in the drain line. Video on how to clean central air units condensate drain Return to central air conditioner and refrigeration cycle from central air unitsIn most cases, water dripping from you house would be a cause for concern. However, there is at least one exception. There is a line that runs from your air conditioning system to the outside that performs an important function to keep your home comfortable – especially in the heat of summer.  

This drainage pipe – officially known as the condensate line -- drains water that condenses on the unit while it cools your home. Over time, the pipe will clog, and could cause the draining water to back up and flood your home, so if you’ve never had the line inspected and cleaned, you’re probably overdue.Why is it important to have the condensate line inspected/cleaned? Your home comfort system performs two important functions while cooling your home. In addition to lowering the temperature, it removes excess humidity from the air. This humidity (in the form of vapor) collects and condenses on refrigerated coils in your unit. When enough condensation has collected, it drips into a pan connected to the condensate line. Naturally, when you use your unit more, especially in the hot, humid months of summer, more moisture collects on the unit, so make sure your condensate line is clear and ready to function.How do clogs occur? When you see the small stream or steady drip of water from your drainage pipe, it might be hard to imagine it clogging, but it’s not just water that’s draining from your unit.

Bacteria, dust and other particles can collect in the pipe, on your unit and in the air. When that is mixed with the condensate water it creates, to use a technical term, “gunk.” Because of the dark, damp conditions, algae and mold can also grow in the pipe and cause it to clog. Eventually, the pipe will clog enough to prevent your unit from draining properly, causing the water to back up into your home and cause flooding and possibly costly damage.How do you know if your condensate line is clogged?Most units have an overflow sensor in place to alert homeowners when their drainage pipe is clogged. This sensor is attached to the drip pan. When the condensate pipe is clogged, the drip pan doesn’t drain and fills up with water. At this point, the sensor is triggered and turns off the unit to prevent it from creating more condensation and potentially flooding. If your unit shuts off and won’t turn back on, it’s likely that the sensor has been triggered. Be sure to have the sensor tested regularly.