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4. Condensate neutralization
Condensate from the boiler is slightly acidic with a pH of 3.2 - 4.5. To avoid long term damage to the
drainage system and to meet local code requirements, HTP recommends neutralizing the condensate
with a Condensate Neutralizer Kit (Part # 7350P-611). The neutralizer kit connects to the drain system
and contains marble chips that neutralize the pH level of the water vapor. The neutralizer kit should be
checked annually and the marble chips replenished if necessary. When replacing the marble chips, take
care to ensure chips are no smaller than ½” to avoid blockage in condensate piping (refer to Figure 14 for
piping of the condensate neutralizer.)
It is very important that the condensate piping be no smaller than ¾”. You must use a tee at the
condensate connection with a branch vertically up and open to the atmosphere, so as not to cause a
vacuum that could obstruct the flow of condensate from the boiler. To prevent sagging and maintain pitch,
condensate piping should be supported with pipe supports.
Figure 14 – Condensate Piping NOTE: Blow water into the condensate collector to remove any foreign matter
that may block the line.
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