TL;DR
GPM, gallons per minute, is the volumetric flow rate used to size and compare plumbing fixtures, pumps, water heaters, and pressure washers. Federal standards cap showerheads at 2.5 GPM, tankless water heaters are rated by how many GPM they can raise to temperature, and well pumps are selected to match household peak demand.
What it means
GPM, gallons per minute, is the volumetric flow rate used to size and compare plumbing fixtures, pumps, water heaters, and pressure washers. Federal standards cap showerheads at 2.5 GPM, tankless water heaters are rated by how many GPM they can raise to temperature, and well pumps are selected to match household peak demand. Measuring it can be as simple as timing how long a fixture takes to fill a 5-gallon bucket, a test plumbers use to verify supply problems.
Where it sits in the glossary
GPM 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
License: CC-BY-4.0 — quote freely with attribution to ProFix Editorial Team / ProFix Directory.