Gas Furnace Vent Pipe Corrosion

Over time the moisture as well as the chemicals released by the furnace can damage the flue and vent pipe.

Gas furnace vent pipe corrosion.

When the combustion gases stay inside the vent pipe or are forced back into it before escaping the chimney you ll see corrosion on the metal usually at the elbows. Due to the condensing nature of a high efficiency furnace its venting must be made of a material that is resistant to corrosion. If you do notice corrosion anywhere on your furnace shut off the gas and contact a professional to check on the system. Look at the outlet and inlet vent exhaust pipes and connections.

High humidity and moisture can play a part as can a lack of venting of exhaust gasses in your furnace. Condensate from a high efficiency furnace typically has a ph of about 5 0 but can range from 3 5 to 6 5. Pennsylvania suffers from high humidity and rain in the summer which can get trapped in your system and create rust. The epa recommends that household water be between 6 5 and 8 5 for health reasons not because of damage to pipes.

Corrosion is a serious problem. Corrosion in a forced air furnace is caused by a number of factors. In a great majority of cases plastic piping is used to vent high efficiency equipment. Well making sure that you choose the right venting style will protect them.

Don t panic if either of these situations apply to you. Rust and corrosion create leaks that allow the vapor to make its way into your home. The combustion by products of a gas furnace contain slightly acidic moisture. More often than not this means you ve got a backdrafting problem.

Plastic vent connector pipes must slope at least 1 4 per foot 0 25 12 of run so that condensate drains back to the furnace. Look for secure fastening and support of vent connector pipes. For various reasons it can condense inside the vent and drip out of the pipe connections and back into the furnace or onto the floor leading to corrosion of furnace components and. Venting for high efficiency gas furnaces materials.

Once a gas furnace is more than 15 years old corrosion is more likely. Under normal furnace operation this particulate is vented to the exterior of the home. High efficiency boilers and furnaces require a condensate neutraliser to protect drain pipes from corrosion. When we are talking about gas furnace vent pipe code we need to talk about the different types of the vents first after all you want to keep your family safe from harm.

The different types of venting. Look at the vent connector pipes for proper support slope and termination.