TL;DR
A full-port valve is a ball valve whose internal bore matches the pipe's inside diameter, so fluid passes with essentially no restriction or pressure loss — unlike a standard-port valve, whose passage is one size smaller. Plumbers specify full-port for main shutoffs, pump connections, and any line that may need a drain cleaner's cable or pig passed through it.
What it means
A full-port valve is a ball valve whose internal bore matches the pipe's inside diameter, so fluid passes with essentially no restriction or pressure loss — unlike a standard-port valve, whose passage is one size smaller. Plumbers specify full-port for main shutoffs, pump connections, and any line that may need a drain cleaner's cable or pig passed through it. The larger body costs slightly more and is the reason two visually similar ball valves carry different prices on a quote.
Where it sits in the glossary
Full-port valve 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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