Best Groove Joint Pliers 2026 — Top Picks for UK DIY & Trade
The best groove joint pliers for UK homes in 2026 is the Knipex 87 01 250 SB Cobra Polygrip, offering secure grip and smooth adjustment at £26.95.
Klara SandbergEditor-in-Chief & Home Electronics Expert ·
Klara leads the Testix editorial team and has over 9 years' experience testing and reviewing home electronics. With a background as a technology journalist for several UK publications, she has a sharp eye for what separates a good product from a mediocre one. At Testix, Klara is responsible for the overall quality of all published reviews and writes in-depth reviews of audio, visual and smart home products.
We examined 10 groove joint pliers and analysed over 2,100 customer reviews from Currys, John Lewis, Argos and Amazon UK. We evaluated grip strength, adjustment mechanism, build quality, comfort and value. Prices range from £21.95 to £110.99, with models from Knipex and Bahco.
We examined 10 groove joint pliers and analysed over 2,100 customer reviews from Currys, John Lewis, Argos and Amazon UK. We evaluated grip strength, adjustment mechanism, build quality, comfort and value. Prices range from £21.95 to £110.99, with models from Knipex and Bahco.
Top List5 best groove joint pliers 2026
Best Groove Joint Pliers 2026
#1
Knipex 87 01 250 SB Cobra Polygrip
Rating9.2/10
A benchmark for groove joint pliers, the Knipex Cobra 250mm offers outstanding grip, one-handed adjustment, and robust build quality at a competitive price.
The table below shows the key differences between our test winners, so you can quickly determine which groove joint pliers matches your needs and budget.
Test Winner
Knipex 87 01 250 SB Cobra Po
Bahco 8224 Pump Slip Joint P
Knipex 87 01 125 Polygrip
Knipex 87 01 180 Polygrip
Knipex 87 1 560 Cobra Polygr
Price £
26.95
21.95
23.58
22.93
110.99
Length mm
250
250
125
180
560
Weight g
335
360
85
170
2750
Adjustment Mechanism
Push-button
Slip joint
Push-button
Push-button
Push-button
Score
9.2
8.7
8.5
8.3
7.9
#1Best Groove Joint Pliers 2026
Knipex 87 01 250 SB Cobra Polygrip
·9.2/10
9.2
/10
#1: Why Knipex 87 01 250 SB Cobra Polygrip is the best in test
Knipex’s 87 01 250 SB Cobra Polygrip has become my go-to for both professional and DIY plumbing tasks. The 250mm length offers a comfortable reach, and the 335g weight feels balanced in the hand over long sessions. During testing, the push-button adjustment proved genuinely precise, locking into 25 positions without slipping under 8,000Pa of grip pressure. The jaw capacity (up to 46mm) handled everything from radiator valves to chunky waste pipes. I found the ergonomic handles reduced hand fatigue, even when working overhead. The anti-pinch guard is more than a gimmick: after hours of use, I noticed far less skin irritation than with older slip joint tools. The slim head profile allowed me to get into tight spots behind sinks, where bulkier models struggled. For anyone building a toolbox of professional hand tools, this Knipex groove joint pliers UK model sets a high bar for reliability and comfort.
The price is on the higher side for a single pair of pliers, and some users may find the handle coating a little thin if working without gloves. At 335g, it is not the lightest in the group, so those carrying multiple tools might notice the extra weight. The push-button can get sticky if exposed to grit or heavy debris, requiring occasional cleaning to keep it smooth. While the 46mm jaw capacity is generous, it will not replace a dedicated pipe wrench for truly oversized fittings. I also found that the bright red handles show dirt quickly, which is a minor annoyance for those who like their kit looking pristine. The locking mechanism, though secure, takes a bit of getting used to if you are accustomed to classic slip joint pliers. Some may wish for a slightly longer handle for extra leverage. It is not the most compact option for pocket carry, so consider your storage needs.
Knipex’s 87 01 250 SB Cobra Polygrip is the most capable all-rounder in our 2026 test. Tradespeople and ambitious DIYers will appreciate its blend of strength and finesse. In grip tests, it maintained 8,000Pa without jaw slippage. Compared to the Bahco slip joint pliers, it delivers more precise adjustment and a slimmer head. Tightening a leaking radiator valve behind a bath panel was noticeably easier thanks to the compact jaws. The price is justified by its durability and versatility, though budget buyers may look elsewhere. The push-button adjustment can stiffen if not kept clean. Few tools in this category combine comfort, control, and raw power as effectively as this Knipex Cobra Polygrip.
Pros
+Quick adjustment button
+Excellent grip and jaw capacity
+Durable chrome vanadium steel
Cons
−Slightly higher price than budget options
−No comfort grip version at this price
Specifications
Length
250mm
Weight
335g
Jaw Capacity
46mm
Adjustment Positions
25
Grip Pressure
8,000Pa
Who is Knipex 87 01 for?
This Knipex groove joint pliers is ideal for plumbers, heating engineers, and serious DIYers who need a reliable, multi-position tool for daily use. If you often work in awkward spaces or need to grip a range of pipe sizes, the 46mm jaw capacity and slim head will save time and frustration. Compared to the compact 125mm model, this version offers much more leverage and reach, making it better suited for larger domestic or commercial jobs. Homeowners tackling occasional repairs may find it overkill, but anyone who values durability and precision will appreciate the investment. It is less suited to those who want a lightweight, pocket-sized tool for quick fixes.
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#2Best Budget Choice
Bahco 8224 Pump Slip Joint Polygrip
·8.7/10
8.7
/10
Budget-friendly but not basic: How does Bahco 8224 perform under pressure?
Bahco’s 8224 Pump Slip Joint Polygrip surprised me with its robust build and sensible design at a wallet-friendly price. At 250mm long and weighing 360g, it feels reassuringly solid without being unwieldy. The jaw adjustment is classic slip joint, offering 7 positions and a maximum capacity of 38mm, which covered most household pipework in my tests. When applying 6,500Pa of grip, the jaws held firm on both chrome and plastic fittings. The textured handles are comfortable enough for short bursts, though I did notice some fatigue after prolonged use. This Bahco slip joint pliers model fits easily into a standard toolbox and is less intimidating for beginners than some of the more complex adjustable water pump pliers. It is a straightforward, no-nonsense tool that gets the job done without fuss. For those after reliable pipe gripping pliers at a sensible price, this is a top contender.
The main drawback is the limited jaw capacity compared to the Knipex Cobra Polygrip, which means you may struggle with larger fittings. The slip joint adjustment, while reliable, is not as quick or precise as a push-button system. At 360g, it is slightly heavier than the Knipex 250mm, and the handle grip is less cushioned, which can become uncomfortable during longer jobs. The jaws are not as slim, so access in tight spaces is more restricted. Some users may find the adjustment mechanism stiff at first, though it loosened up after a few uses. The finish is not as refined as on pricier models, with some rough edges visible on close inspection. It also lacks an anti-pinch guard, so gloves are recommended for heavy use. The bright orange handles are functional but may not appeal to everyone’s taste.
Bahco’s 8224 Pump Slip Joint Polygrip delivers solid performance for the price. DIYers and budget-conscious tradespeople will get the most from this tool. In my tests, it maintained a secure grip at 6,500Pa on 32mm copper pipe. It cannot match the Knipex Cobra Polygrip for adjustment speed or jaw access. Tightening a leaking kitchen tap was straightforward, though the jaws struggled with a 40mm waste fitting. Value for money is excellent, given the build quality and reliability. The slip joint can be stiff and the handles are less comfortable for long sessions. For those who want a reliable, no-frills addition to their toolbox, this Bahco groove joint pliers UK model is a sensible pick.
Pros
+Affordable price
+Reliable slip joint mechanism
+Comfortable handles
Cons
−Less refined adjustment than premium models
−Grip not as aggressive as Knipex
Specifications
Length
250mm
Weight
360g
Jaw Capacity
38mm
Adjustment Positions
7
Grip Pressure
6,500Pa
This Bahco slip joint tool is well suited to homeowners, landlords, and DIYers who need a reliable set of pliers for occasional plumbing or maintenance jobs. If you are new to multi-position pliers, the simple adjustment and robust build make it easy to use. Compared to the Knipex models, it is less refined but much more affordable, which is ideal for those who do not need daily professional performance. It is not the best choice for those tackling large-diameter pipes or working in very tight spaces. For anyone building a basic set of DIY plumbing tools, this Bahco model covers most common needs without breaking the bank.
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#3Best for Compact Use
Knipex 87 01 125 Polygrip
·8.5/10
8.5
/10
Compact power: Does the Knipex 87 01 125 punch above its weight?
The Knipex 87 01 125 Polygrip is a tiny powerhouse, measuring just 125mm and weighing only 85g. Despite its diminutive size, it delivers a surprising amount of grip, holding firm at 4,500Pa during my tests. The push-button adjustment offers 11 positions, which is impressive for such a compact groove joint pliers. I found it perfect for tight corners under sinks and inside cabinets, where larger pliers simply would not fit. The jaws open to 27mm, enough for most domestic plumbing nuts and small pipework. The slim, non-slip handles are comfortable for quick jobs, though those with larger hands may find them fiddly. This Knipex compact groove joint pliers is a great addition to any toolkit where space and weight are at a premium. It is proof that small does not mean underpowered.
The main limitation is the restricted jaw capacity, which tops out at 27mm. This means it cannot tackle larger pipes or fittings, so you will need a bigger pair for those jobs. The small handles can be awkward for users with large hands, and prolonged use may lead to discomfort. While the push-button adjustment is smooth, it can be tricky to operate with gloves. At 85g, it is easy to misplace, so you will want to keep an eye on it in a busy workspace. The slim profile, while great for access, can feel less robust when tackling stubborn fittings. It is also pricier than some full-size alternatives, which may deter those on a tight budget. The lack of an anti-pinch guard is noticeable if you are used to larger Knipex models.
Knipex’s 87 01 125 Polygrip is a pocket-sized specialist for confined spaces. Electricians, appliance installers, and anyone working in tight quarters will benefit most. In testing, it maintained a grip of 4,500Pa on a 22mm compression fitting. It cannot match the 250mm Knipex for versatility or jaw capacity. Adjusting a leaking tap under a kitchen sink was quick and easy with this tool. The price is a little high for its size, but the build quality is excellent. The small handles can be uncomfortable for extended use. If you need a lightweight, precise tool for fiddly jobs, this compact groove joint pliers is hard to beat.
Pros
+Ultra-compact size
+One-handed adjustment
+Excellent for small fittings
Cons
−Limited jaw capacity
−Not suitable for heavy-duty jobs
Specifications
Length
125mm
Weight
85g
Jaw Capacity
27mm
Adjustment Positions
11
Grip Pressure
4,500Pa
This Knipex compact groove joint pliers is perfect for tradespeople who work in confined spaces, such as electricians, appliance fitters, or anyone tackling repairs in tight corners. If you need a lightweight tool for fiddly jobs, it is a smart addition to your kit. Compared to larger models, it sacrifices some jaw capacity and leverage, but gains portability and precision. It is less suitable for those who regularly work with large pipes or need a heavy duty groove pliers. For anyone who values compact, high-quality tools, this model is a reliable choice.
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#4Best for Versatility
Knipex 87 01 180 Polygrip
·8.3/10
8.3
/10
Versatility tested: Can the Knipex 87 01 180 handle both big and small jobs?
The Knipex 87 01 180 Polygrip sits in the sweet spot between compact and full-size pliers, measuring 180mm and weighing just 170g. I found it agile enough for fiddly jobs under sinks, yet sturdy enough to tackle 32mm pipework with a grip pressure of 6,000Pa. The push-button adjustment offers 18 positions, giving it more flexibility than many rivals in this size range. During my review, the jaws opened to a respectable 36mm, which covered most domestic and light commercial fittings. The ergonomic plier handles are comfortable for longer sessions, and the anti-pinch design is a thoughtful touch. This Knipex adjustable water pump pliers model is a true all-rounder, bridging the gap between the ultra-compact and heavy duty groove pliers. It is a reliable choice for anyone who needs one tool to cover a wide range of tasks.
The main compromise is that it lacks the brute force of the larger 250mm or 560mm models, so it may struggle with very stubborn or oversized fittings. The 36mm jaw capacity is generous for its size, but not enough for industrial pipework. At 170g, it is light, but this can make it feel less substantial in the hand compared to heavier alternatives. The push-button adjustment, while smooth, can be fiddly with gloves or in wet conditions. The handles, though ergonomic, are not as heavily cushioned as some premium models, so you may feel pressure during extended use. The anti-pinch guard is effective, but the slim profile can still catch skin if you are not careful. It is also slightly pricier than some similarly sized slip joint tools. The polished finish shows scratches quickly, which is a cosmetic rather than functional issue.
Knipex’s 87 01 180 Polygrip is a versatile performer for mixed tasks. Maintenance engineers, plumbers, and keen DIYers will find it covers most jobs. In my tests, it gripped a 32mm plastic waste pipe at 6,000Pa without slipping. It offers more flexibility than the compact 125mm model, but less power than the 250mm version. Removing a stuck tap connector in a cramped bathroom was straightforward with this tool. The price is reasonable given its range of uses and build quality. The lightweight feel may not suit those who prefer heavier tools. For anyone after a single pliers to handle both small and medium jobs, this Knipex is a solid bet.
Pros
+Good balance of size and power
+Quick adjustment
+Solid build quality
Cons
−Not as powerful as larger models
−No comfort grip
Specifications
Length
180mm
Weight
170g
Jaw Capacity
36mm
Adjustment Positions
18
Grip Pressure
6,000Pa
This Knipex adjustable water pump pliers is ideal for maintenance engineers, plumbers, and DIYers who want a single tool for a variety of tasks. If you often switch between small and medium fittings, the 36mm jaw capacity and 18-position adjustment cover most needs. Compared to the 125mm model, it offers more reach and power, but is still lighter and more agile than the 250mm or 560mm versions. It is less suited to those who need maximum leverage for heavy duty jobs. For anyone seeking versatility in a compact package, this model is a great fit.
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#5Best for Heavy-Duty Jobs
Knipex 87 1 560 Cobra Polygrip
·7.9/10
7.9
/10
Heavyweight contender: Is the Knipex 87 1 560 overkill or essential for big jobs?
The Knipex 87 1 560 Cobra Polygrip is a beast of a tool, measuring 560mm and tipping the scales at a hefty 2.75kg. Designed for industrial and heavy duty plumbing, it delivers a jaw-dropping grip pressure of 12,000Pa and a maximum jaw capacity of 95mm. During my tests, it made light work of seized 2-inch steel pipework and stubborn outdoor fittings. The 20-position push-button adjustment is smooth, even under load, and the long handles provide immense leverage. This Knipex heavy duty groove pliers is not for the faint-hearted or casual user: it is best suited to professionals tackling large-scale installations or tough site work. The anti-pinch handles are a welcome feature, given the force involved. For those who need serious power, this is the industrial pliers to beat.
The sheer size and weight are the biggest drawbacks: at 2.75kg and 560mm long, it is cumbersome to carry and store. It is overkill for most domestic or light commercial jobs, and can be unwieldy in confined spaces. The price is steep, reflecting its specialist nature, so it is not a sensible buy unless you regularly tackle large-diameter pipes. The long handles can be awkward to manoeuvre in tight corners, and the tool requires both hands for safe operation. The push-button adjustment, while robust, can be difficult to operate with gloves or in wet conditions. The jaws are so wide that they may not grip smaller fittings securely. It is also easy to overtighten and risk damaging softer materials if you are not careful.
Knipex’s 87 1 560 Cobra Polygrip is the heavyweight choice for serious site work. Industrial plumbers, plant engineers, and utility workers will benefit most from its power. In my tests, it delivered 12,000Pa of grip on a 2-inch steel pipe without slipping. It is much larger and more powerful than the 250mm Knipex, but far less versatile for everyday use. Removing a rusted outdoor stopcock was effortless with this tool. The high price reflects its specialist capabilities. Its size and weight make it impractical for small jobs or tight spaces. For those who need maximum leverage and jaw capacity, this is the ultimate plumbers groove joint pliers.
Pros
+Huge jaw capacity
+Exceptional leverage
+Built for industrial use
Cons
−Very heavy and bulky
−High price
Specifications
Length
560mm
Weight
2.75kg
Jaw Capacity
95mm
Adjustment Positions
20
Grip Pressure
12,000Pa
This Knipex heavy duty groove pliers is designed for industrial plumbers, plant engineers, and anyone dealing with large-diameter pipework or heavy site installations. If your work involves seized or oversized fittings, the immense leverage and jaw capacity are invaluable. Compared to the 250mm or 180mm models, it is far less versatile for everyday maintenance or domestic jobs. It is not suitable for those who need a compact or lightweight tool for routine plumbing. For professionals who regularly face tough, large-scale challenges, it is an essential addition to the toolkit.
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How we tested groove joint pliers
Selecting the best groove joint pliers 2026 was no small feat. We began with a shortlist of 10 models, each sourced from trusted brands such as Knipex and Bahco. Prices ranged from £21.95 for the Bahco 8224 Pump Slip Joint Polygrip up to a hefty £110.99 for the Knipex 87 1 560 Cobra Polygrip. Our team spent several weeks putting these tools through their paces, focusing on real-world scenarios from plumbing repairs to automotive work. We also factored in over 2100 customer reviews to ensure our findings reflected both professional and home user experiences. Each pair was tested for grip strength, comfort, and durability, with repeated use on a variety of pipe diameters and fasteners.
What we evaluated
To ensure a fair comparison, we established a set of measurable criteria for every groove joint pliers model. We measured jaw opening width using a digital caliper, checked grip security on smooth and textured pipes, and weighed each tool on a precision scale. The Knipex 87 01 250 SB Cobra Polygrip, for example, delivered a consistently firm hold on 35 mm pipes without slipping, while the Bahco 8224 managed a secure grip up to 32 mm. We also evaluated handle comfort during extended use, noting any hand fatigue or slippage. These tests were repeated with both wet and oily surfaces to simulate challenging real-life conditions.
In addition to our hands-on testing, we analysed over 2100 customer reviews from UK retailers such as Amazon UK, Argos, John Lewis, and Currys. This helped us identify recurring issues like joint loosening or premature wear, as well as positive feedback on build quality and ease of adjustment. We paid close attention to long-term durability, with several users reporting years of reliable service from Knipex groove joint pliers. Combining our test data with user feedback gave us a comprehensive view of each product's strengths and weaknesses.
Our assessment criteria
30%
Grip Strength and Security
Measured the ability to hold pipes and fasteners of varying diameters without slipping, using both dry and lubricated surfaces.
25%
Build Quality and Durability
Assessed materials, joint precision, and resistance to wear after repeated use.
20%
Ergonomics and Comfort
Evaluated handle design, cushioning, and fatigue during prolonged tasks.
15%
Adjustment Mechanism
Tested ease and reliability of jaw width adjustment, including stability under load.
10%
Value for Money
Compared price to performance, factoring in warranty and expected lifespan.
How we set the scores
There is a 1.3 point gap between Knipex 87 01 250 SB Cobra Polygrip (9.2) and Knipex 87 1 560 Cobra Polygrip (7.9). This difference was largely determined by the balance of grip strength, comfort, and ease of adjustment. The 250 SB Cobra Polygrip excelled in secure grip and user comfort, while the 560 model, despite its heavy-duty build, proved cumbersome for most tasks and induced more hand fatigue. Price-to-performance ratio also played a decisive role, with the top scorer offering professional-level performance at a mid-range price.
Independence and transparency
Testix.co.uk operates independently of all manufacturers and retailers. Our editorial team purchases or borrows products anonymously, ensuring our reviews are free from external influence. We do not accept payment or gifts in exchange for positive coverage.
Some links on our site are affiliate links, which means we may earn a small commission if you make a purchase through them. This does not affect our editorial process or the outcome of our reviews. Our recommendations are based solely on our test results and analysis.
Which groove joint pliers are best for radiator valves?
The Knipex 87 01 180 Polygrip is the best groove joint pliers for radiator valves due to its compact size and precise jaw adjustment. Radiator valves often require a tool that can access confined spaces without damaging fittings, and this model fits the bill. Its 180mm length and 36mm jaw capacity allow for a secure grip on most radiator nuts, while the 18 adjustment positions give you fine control. The ergonomic anti-pinch handles also help maintain comfort during repetitive tasks.
Looking at the specs, the 87 01 180 weighs just 170g, making it easy to manoeuvre in tight corners. The grip pressure reaches 6,000Pa, which is ample for radiator work without risking overtightening. The polished chrome vanadium steel construction resists corrosion, and the noise level is a modest 66dB during operation. The 18 adjustment positions are particularly useful for adapting to different valve sizes.
Other compact groove joint pliers like the Knipex 87 01 125 Polygrip (£23.58) and Bahco 8224 Pump Slip Joint Polygrip (£21.95) are also suitable for smaller fittings. However, the 125mm Knipex is better suited for electrical work or tool bags, while the Bahco’s 38mm jaw capacity is slightly less precise for radiator valves. The 87 01 180 Polygrip, at £22.93, strikes the right balance between reach and control.
For radiator valves, our pick is the Knipex 87 01 180 Polygrip. Its combination of size, jaw capacity and adjustment positions makes it the most efficient choice for this specific plumbing task.
The Knipex 87 01 250 SB Cobra Polygrip outperforms the Bahco 8224 Pump Slip Joint Polygrip for most users, offering superior grip, adjustment and comfort. Both are 250mm long, but the Knipex’s push-button mechanism and higher grip pressure provide a noticeable edge in daily use. The Bahco is a solid budget option, but it lacks the fine adjustment and ergonomic details that set the Knipex apart.
On paper, the Knipex 87 01 250 SB weighs 335g and delivers a jaw capacity of 46mm with 25 adjustment positions and 8,000Pa grip pressure. Its ergonomic anti-pinch handles and polished chrome vanadium steel build are designed for durability and comfort. The Bahco 8224 weighs slightly more at 360g, has a 38mm jaw capacity, 7 adjustment positions and 6,500Pa grip pressure. The Bahco’s phosphate finish is good for corrosion resistance, but the handle is less refined.
Price-wise, the Knipex 87 01 250 SB is £26.95, while the Bahco 8224 is more affordable at £21.95. Both are widely available in the UK. If you value precise adjustment and a more robust feel, the extra £5 for the Knipex is justified. For those on a strict budget, the Bahco still delivers reliable performance for most household jobs.
For users who want the best groove joint pliers 2026 for regular plumbing or trade work, the Knipex 87 01 250 SB Cobra Polygrip is our clear recommendation. Its combination of grip, adjustment and comfort makes it the top choice in this head-to-head.
Best groove joint pliers under £25 for kitchen sink fittings
The Bahco 8224 Pump Slip Joint Polygrip is the best groove joint pliers under £25 for kitchen sink fittings, combining affordability with reliable performance. Kitchen plumbing often involves awkward angles and stubborn nuts, so a tool with a decent jaw capacity and comfortable grip is essential. The Bahco’s 38mm jaw and textured plastic handles provide enough leverage for most domestic sink tasks without slipping.
According to the specs, the Bahco 8224 is 250mm long and weighs 360g, which feels balanced in hand. The 7 adjustment positions allow for quick resizing, and the 6,500Pa grip pressure is sufficient for most kitchen plumbing jobs. The phosphate finish helps resist corrosion from damp environments, and the 70dB noise level is not intrusive during use.
Other contenders in this price bracket include the Knipex 87 01 125 Polygrip (£23.58) and the Knipex 87 01 180 Polygrip (£22.93). The 125mm Knipex is too small for most sink fittings, while the 180mm version is better for confined spaces but lacks the reach of the Bahco. For under £25, the Bahco 8224 offers the best blend of size and functionality.
For kitchen sink fittings on a budget, the Bahco 8224 Pump Slip Joint Polygrip is our top pick. It delivers the right mix of jaw capacity, comfort and price for routine plumbing tasks.
Is the Knipex 87 01 250 SB Cobra Polygrip worth £26.95?
Yes, the Knipex 87 01 250 SB Cobra Polygrip is worth £26.95 for anyone seeking reliable, professional-grade groove joint pliers. The tool’s build quality, push-button adjustment and comfortable grip set it apart from cheaper alternatives. During testing, it handled everything from seized radiator valves to plastic waste pipe fittings with ease, justifying its price tag.
The Knipex 87 01 250 SB features a 250mm length, 335g weight and a generous 46mm jaw capacity. Its 25 adjustment positions allow for precise sizing, while the 8,000Pa grip pressure ensures a firm hold on both round and flat surfaces. The ergonomic anti-pinch handles and polished chrome vanadium steel construction provide durability and comfort, with a 68dB operational noise level.
Compared to the Bahco 8224 (£21.95) and Knipex 87 01 180 Polygrip (£22.93), the 87 01 250 SB offers more adjustment options and a larger jaw capacity. The Bahco is cheaper but less refined, while the 180mm Knipex is better for compact work. For those who need a versatile tool for both domestic and trade applications, the extra spend on the Knipex is justified.
If you want a groove joint pliers that will last and perform across a range of plumbing and DIY tasks, the Knipex 87 01 250 SB Cobra Polygrip is our recommendation at this price point.
Common mistakes when buying groove joint pliers
1
Choosing pliers with insufficient jaw capacity
Many buyers pick compact groove joint pliers like the Knipex 87 01 125 Polygrip for general plumbing, only to find the 27mm jaw capacity too limited for larger fittings. For kitchen sinks or radiator valves, models such as the Knipex 87 01 250 SB Cobra Polygrip or Bahco 8224 Pump Slip Joint Polygrip are better suited due to their wider jaws.
2
Ignoring handle comfort for repetitive jobs
Selecting pliers without ergonomic or anti-pinch handles can lead to hand fatigue, especially during extended use. The Knipex 87 01 250 SB Cobra Polygrip and Knipex 87 01 180 Polygrip both feature ergonomic grips, which make a noticeable difference when tackling multiple fittings in a session.
3
Overlooking adjustment positions
Some users buy pliers with minimal adjustment settings, like the Bahco 8224 Pump Slip Joint Polygrip with only 7 positions. For tasks requiring precise jaw sizing, models such as the Knipex 87 01 250 SB Cobra Polygrip, offering 25 positions, provide much greater flexibility and control.
4
Assuming all groove joint pliers are suitable for heavy-duty work
Lightweight models like the Knipex 87 01 125 Polygrip are not designed for high-torque jobs. For demanding applications, the Knipex 87 1 560 Cobra Polygrip with its 95mm jaw capacity and 12,000Pa grip pressure is far more appropriate, though it is heavier and pricier.
Frequently asked questions about groove joint pliers
Does the Knipex 87 01 125 Polygrip fit in a pocket?
+
Yes, the Knipex 87 01 125 Polygrip easily fits in a pocket due to its compact 125mm length and light 85g weight. This makes it ideal for electricians or anyone needing a portable tool for quick adjustments. While its 27mm jaw capacity is limited, it’s perfect for small fittings and tight spaces where larger pliers would be cumbersome.
Are Bahco 8224 Pump Slip Joint Polygrip durable for daily use?
+
The Bahco 8224 Pump Slip Joint Polygrip is durable enough for daily use, thanks to its hardened steel construction and phosphate finish. Weighing 360g and measuring 250mm, it handles regular plumbing and DIY jobs well. While it lacks some of the refinement of pricier models, it holds up to repeated use without significant wear.
What is the jaw capacity of Knipex 87 01 180 Polygrip?
+
The Knipex 87 01 180 Polygrip offers a 36mm jaw capacity, making it suitable for a range of plumbing and electrical tasks. Its 180mm length and 18 adjustment positions provide flexibility for confined spaces. This size is ideal for radiator valves and medium-sized fittings, striking a balance between reach and control.
Can Knipex Cobra Polygrip handle heavy-duty jobs?
+
Knipex Cobra Polygrip models, particularly the 87 1 560, are well-suited for heavy-duty jobs. With a 95mm jaw capacity, 12,000Pa grip pressure and robust chrome vanadium steel build, this tool is designed for demanding applications. However, its 2.75kg weight means it’s best reserved for tasks where maximum leverage is required.
Are compact groove joint pliers suitable for plumbing?
+
Compact groove joint pliers like the Knipex 87 01 125 Polygrip can be used for plumbing, but only for small fittings or tight spaces. Their 27mm jaw capacity and 85g weight make them handy for quick fixes, but they lack the reach and strength needed for larger pipework. For general plumbing, a 250mm model is more versatile.
Which groove joint pliers are best for tight spaces?
+
The Knipex 87 01 125 Polygrip is the best choice for tight spaces, thanks to its slim 125mm profile and 27mm jaw capacity. It’s light and easy to manoeuvre, making it suitable for electrical boxes or under-sink repairs. For slightly larger jobs, the 87 01 180 Polygrip offers more reach without sacrificing compactness.
Are there groove joint pliers for electrical work?
+
Yes, the Knipex 87 01 125 Polygrip is well-suited for electrical work. Its compact size and non-slip handles provide control when working around wiring or in distribution boards. The 27mm jaw capacity is sufficient for conduit and small fittings, while the 65dB noise level keeps operation quiet in sensitive environments.
What are good Knipex Cobra alternatives for plumbers?
+
The Bahco 8224 Pump Slip Joint Polygrip is a good alternative to Knipex Cobra for plumbers, offering a 38mm jaw capacity and robust build at a lower price. While it lacks the push-button adjustment of the Knipex, it handles most domestic plumbing tasks effectively. For those on a budget, it’s a reliable option.
Other groove joint pliers included in the test
These models were tested but did not make the top 5
