TL;DR
Nozzle orifice size is the numbered bore of a pressure washer tip that must match the machine's flow and pressure output — a 4.0 orifice on a unit needing 5.5 lets pressure collapse, while one too small overworks the pump and unloader. Sizing charts cross gallons per minute against desired PSI to give the right number, which matters most on surface cleaners with multiple spinning tips.
What it means
Nozzle orifice size is the numbered bore of a pressure washer tip that must match the machine's flow and pressure output — a 4.0 orifice on a unit needing 5.5 lets pressure collapse, while one too small overworks the pump and unloader. Sizing charts cross gallons per minute against desired PSI to give the right number, which matters most on surface cleaners with multiple spinning tips. Worn orifices read as gradually falling pressure and are replaced as a maintenance item.
Where it sits in the glossary
Nozzle orifice size 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
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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