Furnace Pvc Exhaust Pipe Leaking

If you have a conventional furnace the two most likely reasons for dripping water include.

Furnace pvc exhaust pipe leaking.

Despite the confusion the safe practice would suggest the use of pvc schedule 40 pipes for the air intake vent on the furnace and cpvc for the exhaust flue vent given its higher service temperature. I had a high efficiency furnace installed in march of this year. That way should there be a problem with the furnace that causes the exhaust temperature to exceed design the exhaust vent system has almost 40 more capacity to handle the excess heat before it reaches the point where it can fail. A bad heat exchanger.

When you see water puddling around the furnace with the a c running you have a clogged condensate drain tube. A poorly sized flue pipe. There should be no water involved with a standard efficiency furnace. A standard efficiency furnace extracts some heat from the combustion gases and quickly vents them out the exhaust or flue pipe.

However if your exhaust pipe is too big or it has no slope it allows too much air to circulate and traps the gases in the flue. Condensation from air conditioning coils contains bacteria that can form slime and clog the condensate pan drain tube. A condensate pumplooks like a small white box connected to the pvc drain pipe on your furnace. If you have a condensing furnace it s likely leaking due to any of the following issues.

A clog or issue in the condensate system. Its job is to pump water toward the drain. If your furnace exhaust pipe or flue pipe is leaking it can be a sign of a much bigger problem. To be more specific the pipe that comes out of the unit is attached to this leaking section which is attached to a pvc elbow then another piece of pipe and so on.

Here s what to look for. If you have a condensation leak with a standard efficiency then its exhaust or flue pipe may be incorrectly sized. If he or she rules out a condensation leak there are other possibilities all still requiring a professional. The fix have a professional replaceyour condensate pump.

To see if the issue is the vent pipe follow these steps. If there is an issue with the condensation pump you will usually be able to see water dripping from the pump. You need to call in a professional to assess what s going on. Bad clogged condensate pump.

You can prevent slime and eliminate drain tube clogs in two easy steps.