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.
Gas furnace vent pipe corrosion.
Well making sure that you choose the right venting style will protect them.
You see white corrosion on your furnace vent pipes.
The different types of venting.
More often than not this means you ve got a backdrafting problem.
Once a gas furnace is more than 15 years old corrosion is more likely.
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.
In a great majority of cases plastic piping is used to vent high efficiency equipment.
High humidity and moisture can play a part as can a lack of venting of exhaust gasses in your furnace.
Corrosion is a serious problem.
The epa recommends that household water be between 6 5 and 8 5 for health reasons not because of damage to pipes.
Look for secure fastening and support of vent connector pipes.
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.
Don t panic if either of these situations apply to you.
Venting for high efficiency gas furnaces materials.
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 vent connector pipes for proper support slope and termination.
Condensate from a high efficiency furnace typically has a ph of about 5 0 but can range from 3 5 to 6 5.
The combustion by products of a gas furnace contain slightly acidic moisture.
Over time the moisture as well as the chemicals released by the furnace can damage the flue and vent pipe.
Pennsylvania suffers from high humidity and rain in the summer which can get trapped in your system and create rust.
Under normal furnace operation this particulate is vented to the exterior of the home.
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.
Rust and corrosion create leaks that allow the vapor to make its way into your home.
It is classified as type bh venting.
If you do notice corrosion anywhere on your furnace shut off the gas and contact a professional to check on the system.
