TL;DR
A measuring tool used by HVAC, plumbing, and gas technicians to verify gas pressure, draft, or pressure differences in inches of water column.
What it means
A measuring tool used by HVAC, plumbing, and gas technicians to verify gas pressure, draft, or pressure differences in inches of water column.
Where it sits in the glossary
Manometer is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
A manometer reads pressure in inches of water column — the practical unit used for natural-gas pressure, draft on a venting system, and pressure drop across a filter or coil. For Ohio gas appliances, manometer readings are the difference between guessing and measuring.
Homeowners do not need to read the meter themselves, but seeing one on the truck is a credibility cue. A gas tech who is willing to attach a manometer at the manifold tap is doing the job the way Columbia Gas, Dominion Energy, and Duke Energy expect.
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Where this term gets mixed up
Manometer vs. combustion analyzer
A manometer reads pressure. A combustion analyzer reads flue-gas composition. Both belong on a complete gas service call.
Inches of water column vs. psi
Natural-gas appliance pressure is measured in inches of water column, not psi. Mixing units leads to large mis-reads.
Where this term comes from
Appliance manufacturer manuals; National Fuel Gas Code (NFPA 54 / ANSI Z223.1).
See also
License: CC-BY-4.0 — quote freely with attribution to ProFix Editorial Team / ProFix Directory.