Water-pump pliers are adjustable gripping pliers used for pipes and other workpieces. Their adjustment positions and capacities vary by size and design.
Typical applications
- Some water‑pump pliers have toothed gripping areas for round, square, hexagonal, and flat objects. Match the chosen jaw design to the work.
Advantages
- Multiple jaw settings allow an adjustable plier to fit different workpiece sizes while maintaining a comfortable handgrip.
Specifications to check
- When selecting water‑pump pliers, compare jaw capacity and adjustment‑position count separately. Neither the count nor the tool length alone is a universal gripping‑capacity rating.
Limitations
- When using water-pump pliers, use a correctly fitting wrench for ordinary nuts and bolts; toothed pliers can round fastener corners.
Buying considerations
Choose jaws that grip the work with a comfortable handle opening. Keep toothed jaws clean and replace tools with worn teeth.
Safety & limits
- Do not extend the handles for extra leverage. Cushion grips provide comfort, not protection against electric shock.
Sources & further reading
These links document the information used in this article. Manufacturer specifications and source research are not hands-on test results or an endorsement of a purchase.
- CCOHS: Hand tool guidance
Reference checked 2026-10-29