Premier New York City Commercial Boiler Repair
with our Condensate Neutralizer Kits

Condensate produced by high–efficiency condensing boilers, including commercial gas boilers and hot water heaters, has inherently low pH (is acidic) and poses a problem for buildings’ drains and piping. What’s the problem with draining condensate into your building’s piping and sewer lines? Simple: because of the chemistry of gas-fired combustion, the fluid is corrosive. The hot fire in a boiler is a reaction between natural gas and oxygen — the units burn methane (CH4) or propane (C3H8) and oxygen (O2) to produce H20 (water) and CO2 (carbon dioxide). But the hot flame also sucks in atmospheric nitrogen, which makes up 70% of the atmosphere, and the fire is hot enough to force the nitrogen to react with oxygen. The resulting NO2 (nitrogen dioxide) and NO (nitrous oxide) dissolve into the water vapor in the exhaust stream to form nitric acid.

In old-fashioned low-efficiency boilers, all that gas — the CO2, the water vapor, and the nitrogen products (known collectively as “NOX”), went up the hot chimney into the atmosphere. They polluted the air, but they didn’t damage any piping. But that was a waste of energy: boilers that didn’t condense the water out of the exhaust stream can’t rate much higher than 80% efficiency at best, and about 65% was more typical. As a general rule of thumb, most boiler owners are looking for at least 90% efficiency. To squeeze 90% or more of the heat energy out of a gas flame, you must condense the water vapor out of the exhaust into liquid form and recover the heat of evaporation from it. It turns out, however, that when you condense out the water vapor, the nitrogen products come along with it. What you end up with is a dilute solution of nitric acid that will eat away your building’s drains.         

Below are pictures of damage caused by untreated boiler condensate; as condensate fluid sits in a pipe it becomes more concentrated and more corrosive. Our New York City commercial boiler repair services reduce the risk of corrosion.

Installing a boiler condensate neutralizer will help to prevent your building’s drains and piping from being destroyed by the acidic condensate your boilers produce.

Our New York City condensate neutralizer kits include acid-resistant plastic tubes filled with a mineral, typically limestone, a neutralizing media, that helps to remove the nitrates, thus helping to lower the acidity levels of the boiler condensate as it passes through. So, the final condensate is a less acidic liquid and will not damage your building’s drainage system, including drains and pipes. This serves a similar purpose to pH power pellets. These products are often overlooked by many building owners and managers, but if included in your annual condensate neutralizer maintenance, they can help save you thousands on a costly plumbing repair. It is also important to ensure that anything entering the sewer has a pH of at least six but no higher than eight in order to comply with chapter six of New York City’s plumbing codes.

Controlled Combustion serves areas across Staten Island, Queens, the Bronx, Brooklyn, Queens, Manhattan, and New York City with commercial boiler repair and more, including expertise in replacing the media in your sewer system.



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