Best Tongue and Groove Pliers for Pipes
Tongue and groove pliers, often called water pump pliers or by the common trade name Channellock, are the go-to tool for gripping, turning, and holding round pipe and fittings. The self-locking jaw design lets the teeth bite into pipe without slipping, which matters most when you are working on a stuck supply line, a corroded trap, or a union that has not moved in years.
Quick answer
The Channellock 420 9.5-inch Tongue and Groove Plier is the best overall pick for most pipe work because of its proven forged steel build, reliable undercut teeth, and comfortable price.
Why trust ToolBuyerHub
- Cross-checked manufacturer-published specifications before writing any recommendation
- Verified US market availability and configuration for every model discussed
- Owner-feedback themes are summarized as feedback, never presented as our own hands-on testing
- No invented star ratings; see the visible Research Score criteria on this page
- Flagged water-isolation and pressure-safety steps wherever a tool touches pressurized lines
- We compare jaw capacity, tooth pattern, handle grip, and steel construction against manufacturer specifications and recurring owner-feedback themes rather than relying on a single retailer rating.
Research updated September 2026.
What Matters Most for This Category
The single most important factor is jaw capacity relative to the pipe sizes you actually work on. A 1.5-inch capacity plier handles most residential supply and drain work, while 2-inch and larger capacities are needed for main lines, gas pipe, and irrigation. Tooth pattern matters too: straight teeth grip flat stock and nuts, while curved or undercut teeth bite round pipe better. Handle comfort becomes important on long jobs, and a forged steel body with a rust-resistant finish will outlast cheaper cast alternatives.
| Model | Best for | Key specs | Research Score |
|---|---|---|---|
| Channellock 420 9.5-Inch Tongue and Groove Plier | Best Overall | 1.5 inches, 9.5 inches | 94/100 |
| Knipex Cobra 87 01 250 10-Inch Water Pump Pliers | Best for Grip | Up to 2 inches, 10 inches | 93/100 |
| IRWIN VISE-GRIP 2078110 10-Inch GrooveLock Pliers | Best Value | Up to 2 inches, 10 inches | 90/100 |
| Channellock 440 12-Inch Tongue and Groove Plier | Best for Larger Pipe | 2.25 inches, 12 inches | 91/100 |
| Milwaukee 48-22-6310 10-Inch Tongue and Groove Pliers | Best for Comfort | 2 inches, 10 inches | 89/100 |
| TEKTON 37500 10-Inch Groove Joint Pliers | Best Budget | 1.5 inches, 10 inches | 86/100 |
| Knipex Cobra 87 01 180 7.25-Inch Water Pump Pliers | Best for Tight Spaces | Up to 1.5 inches, 7.25 inches | 88/100 |
Channellock 420 9.5-Inch Tongue and Groove Plier
Top PickPros
- Undercut teeth grip pipe firmly without slipping
- Forged steel body resists bending under load
- Made in the USA and widely available
Cons
- Dipped handles offer less cushioning than some padded grips
- Only 1.5-inch capacity, so large mains need a bigger model
The 420 is the classic 9.5-inch tongue and groove plier that most plumbers reach for first. Its undercut teeth are cut to bite into round pipe, and the forged steel body holds up to repeated torque. Based on manufacturer specifications, it is a straightforward, durable choice for everyday residential pipe work.
Knipex Cobra 87 01 250 10-Inch Water Pump Pliers
Premium GripPros
- Self-locking jaw design bites and holds without hand pressure
- Push-button adjustment locks the jaw position
- Hardened teeth resist wear on steel pipe
Cons
- Higher price than traditional pliers
- Push-button mechanism can be fussy with gloves on
The Cobra line uses a box-joint and push-button adjustment that lets the jaws self-lock onto pipe once pressure is applied. Based on manufacturer specifications, the hardened teeth and chrome vanadium steel are built for repeated professional use. Owner-feedback themes frequently mention the secure bite on rounded surfaces.
IRWIN VISE-GRIP 2078110 10-Inch GrooveLock Pliers
Great ValuePros
- Multi-groove adjustment gives a wide range of jaw positions
- ProTouch handles reduce hand fatigue
- Competitive price for a 2-inch capacity plier
Cons
- Teeth are less aggressive than premium brands
- Some owners report the adjustment button loosening over time
The GrooveLock uses a multi-groove design that lets the jaw slide into many positions rather than a few fixed notches. Based on manufacturer specifications, the forged steel body and ProTouch handles make it comfortable for longer jobs. It is a strong middle-ground option for homeowners and light trade use.
Channellock 440 12-Inch Tongue and Groove Plier
Big CapacityPros
- 2.25-inch capacity handles larger drain and supply pipe
- Longer handles give more leverage on stuck fittings
- Same proven Channellock tooth pattern as the 420
Cons
- Bulkier to store and carry than a 9.5-inch plier
- Heavier, which matters on overhead work
The 440 is the larger sibling of the 420, with a 2.25-inch jaw capacity and 12-inch handles for extra leverage. Based on manufacturer specifications, it uses the same forged steel construction and undercut teeth. It is the right pick when residential pipe sizes exceed what a 9.5-inch plier can grip.
Milwaukee 48-22-6310 10-Inch Tongue and Groove Pliers
Comfort GripPros
- Comfortable handle design reduces fatigue on long jobs
- Tether-ready handle for working at height
- Rust-resistant finish
Cons
- Fewer jaw positions than some multi-groove designs
- Not made in the USA
Milwaukee's 10-inch tongue and groove plier focuses on handle comfort and jobsite durability. Based on manufacturer specifications, the forged steel jaws and rust-resistant finish are aimed at trade users. The tether-ready handle is a useful detail for overhead pipe work.
TEKTON 37500 10-Inch Groove Joint Pliers
Budget PickPros
- Low price for a forged steel plier
- Comfortable grip for the money
- Simple, reliable groove joint design
Cons
- Teeth are less hardened than premium brands
- Limited to 1.5-inch capacity
The TEKTON 37500 is a no-frills groove joint plier that covers basic residential pipe tasks. Based on manufacturer specifications, it uses a forged steel body and a comfortable grip at a budget price. It is a reasonable starter plier or a spare to keep in a second toolbox.
Knipex Cobra 87 01 180 7.25-Inch Water Pump Pliers
CompactPros
- Compact size fits under sinks and in tight cabinets
- Self-locking jaw design holds without constant hand pressure
- Same hardened teeth as the larger Cobra models
Cons
- Smaller capacity limits it to supply lines and small fittings
- Higher price for a compact plier
The 7.25-inch Cobra brings the self-locking jaw design to a compact size that fits under sinks and inside cramped cabinets. Based on manufacturer specifications, it uses the same hardened teeth and chrome vanadium steel as the larger model. It is the right tool when a full-size plier will not fit.
Who Should Avoid the Top Pick
Avoid this category if you need a pipe wrench for high-torque turning on large steel or gas pipe, since tongue and groove pliers are for gripping and holding rather than breaking loose heavily seized threaded joints. Also skip budget pliers with cast rather than forged jaws if you plan to apply serious force, because the jaw can bend or the teeth can round off.
Before You Buy
Measure the largest pipe or fitting you expect to grip and match it to the plier's jaw capacity, remembering that a 1.5-inch plier will not handle a 2-inch main. Check whether the teeth are undercut or curved for round pipe, and consider handle grip if you will be squeezing for extended periods. Finally, confirm the plier is forged steel rather than cast for better durability.
FAQs
What size tongue and groove pliers do I need for pipes?
For most residential supply lines and small fittings, a 9.5 to 10-inch plier with about 1.5 to 2-inch capacity is enough. Step up to a 12-inch plier with 2.25-inch capacity for larger drain, main, or irrigation pipe.
Are tongue and groove pliers the same as water pump pliers?
Yes, the terms are used interchangeably in the US. Channellock is a common brand name that has become a generic term for this style of plier.
Can I use tongue and groove pliers on chrome pipe?
You can, but the teeth will scratch the chrome finish. Wrap the pipe with tape or a cloth, or use a plier with smooth jaws, if appearance matters.
What is the difference between straight and curved teeth?
Straight teeth grip flat surfaces and nuts well, while curved or undercut teeth bite into round pipe and resist slipping. For pipe work, curved or undercut teeth are usually the better choice.
Do I need a pipe wrench instead?
A pipe wrench provides much more torque and is designed for turning threaded steel or gas pipe. Tongue and groove pliers are better for gripping, holding, and turning smaller fittings and supply lines.
How do I keep tongue and groove pliers from slipping?
Make sure the jaw is sized correctly for the pipe, apply steady pressure so the teeth bite, and keep the teeth clean of grease. A self-locking design like the Knipex Cobra also helps on smooth surfaces.
Our verdict
The Channellock 420 remains the best overall tongue and groove plier for most pipe work thanks to its forged steel build, reliable undercut teeth, and fair price. Step up to the Knipex Cobra if slipping jaws are a recurring problem, or to the Channellock 440 if you regularly handle 2-inch and larger pipe. Match jaw capacity to your largest pipe and you will avoid the most common mistake buyers make.