Gas Furnace Vent Pipe Corrosion

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.

Gas furnace vent pipe corrosion. Once a gas furnace is more than 15 years old corrosion is more likely. If you do notice corrosion anywhere on your furnace shut off the gas and contact a professional to check on the system. Well making sure that you choose the right venting style will protect them. In a great majority of cases plastic piping is used to vent high efficiency equipment.

It is classified as type bh venting. More often than not this means you ve got a backdrafting problem. Venting for high efficiency gas furnaces materials. 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.

High efficiency boilers and furnaces require a condensate neutraliser to protect drain pipes from corrosion. Don t panic if either of these situations apply to you. The epa recommends that household water be between 6 5 and 8 5 for health reasons not because of damage to pipes. 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.

Due to the condensing nature of a high efficiency furnace its venting must be made of a material that is resistant to corrosion. Corrosion in a forced air furnace is caused by a number of factors. But even the best venting furnace may have corrosion begin after so many years of combustion gas vapor in contact with metal. Look at the outlet and inlet vent exhaust pipes and connections.

Look at the vent connector pipes for proper support slope and termination. Corrosion is a serious problem. Look for secure fastening and support of vent connector pipes. The different types of venting.

Rust and corrosion create leaks that allow the vapor to make its way into your home. Under normal furnace operation this particulate is vented to the exterior of the home. You see white corrosion on your furnace vent pipes. 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 combustion by products of a gas furnace contain slightly acidic moisture.