KNIPEX 90 25 185 - Plastic Hose Cutter

[Wamsutta]

Do you guys think it would work on 1/2 inch pipe thread sprinkler riser *******?

It would need to cut the flat section in between the threaded sections.

 

[The Cobbler]

probably

 

[Stelzer]

It'll cut if for sure. Might crush or at least deform it also.

 

[KnurledNut]

Edited due to misunderstanding.

 

[Wamsutta]

It'll cut if for sure. Might crush or at least deform it also.

Crush or deform is out of the question. I want a clean straight cut with no deformity. Jeez, that would be terrible.

I wouldn't recommend them for that application. While I haven't used the Knipex, I have used that single action style cutter in the Ridgid, Milwaukee and Virax flavors and they are largely intended for soft pipe like Pex.
If someone handed me that to cut, I would try my Ridgid ratcheting pipe cutters first. They handle hard plastic pipe like CPVC with ease. It's good to rotate them as you cut to prevent crushing or cracking.
A pipe cutter with a cutting wheel designed for plastic would be another option but would take longer. It would probably do less damage to the threads.
A recip saw would cut that easily but would need to be deburred.

I've seen people on YouTube using the Orbit cutters for the plastic risers just fine, but I wanted high quality overkill.

 

[Shiftless]

…but I wanted high quality overkill.

I have installed a few system so over the years and found that I detest those kind of risers. If you want typical GJ overkill, just use Schedule 80 gray plastic half inch risers. They come in a variety of lengths. And of course, the GJ way is to cut them to the exact length you need and then thread the end with your half inch NPT thread cutting die. Am I right?

Seriously, I also like the flexible ones where you have a chance of avoiding breakage if something or someone steps on or runs over the sprinkler head.

 

[Wamsutta]

I asked the Google AI robot:

Me : Can you tell me if the Knipex 90 25 185 cutter would cut the threaded riser ******* just fine?

Google AI robot : Yes, the Knipex 90 25 185 Pipe Cutter will cut the flat section of your PVC riser ******* perfectly.
It is an excellent, premium choice for this task for several specific reasons:

Why It Works Perfectly

• Ideal Capacity: The tool handles plastic and composite pipes up to 1 inch (25 mm) outer diameter. Standard residential sprinkler riser ******* are typically 1/2-inch or 3/4-inch, meaning they will fit comfortably inside the jaw. [1, 2, 3]
• Right-Angle Alignment: The tool has a built-in molded recess base that naturally forces whatever you are cutting into a perfect 90-degree angle against the blade. This ensures you won't accidentally slide diagonally into the adjacent threads. [1, 2]

 

[Mr Ratchet]

I'd bet anything that the Knipex cut it like a hot knife through butter. Both videos show them cutting similar pipe/tube with a clean cut. The second video show how sturdy that blade is. It's way more stout than a razor blade.

 

[YesIHaveAHammer]

I asked the Google AI robot:

Me : Can you tell me if the Knipex 90 25 185 cutter would cut the threaded riser ******* just fine?

I wouldn't trust AI with this. It's a judgement and application question, rather than an information based one. Unless it's been trained on or finds something online about this scenario, it hasn't got anything to go on.

For interested, I asked an open question and then only later suggested this Knipex model. Now it, the same AI, warns about the potential for cracking.

 

[Jack Ryan]

I think that type of tool is generally wider that the flat section between the threads. There would be (probably minor) thread damage.

Jack

 

[drokihazan]

I wouldn't trust AI with this. It's a judgement and application question, rather than an information based one. Unless it's been trained on or finds something online about this scenario, it hasn't got anything to go on.

For interested, I asked an open question and then only later suggested this Knipex model. Now it, the same AI, warns about the potential for cracking.

Funny enough, it's likely getting some of the answer about potential for cracking from this thread!

 

[tarmy]

I use a box cutter on those OP…been doing that for 30 years. Never a problem.

BUT…I do like you thinking that a new tool is needed, that it is a good quality manufacturer and that you, as ALL worthy GJers, are seriously overthinking it.!

 

[rlitman]

I cut sprinkler risers with my single-action PEX cutter. It works just fine. Never had an issue with damaged threads or pushing the blade too hard. This isn't PVC, and you don't need anything like the strength of a PVC cutter on these.

Mine is blue, has a teflon coated blade and I've had it for decades. Not sure of the brand, but it's similar to this:

 

[KnurledNut]

I edited my original comments because I was incorrect. Those Knipex should work great. I have not personally cut or installed those particular risers and I assumed they were Schedule 80 PVC like the fittings I was familiar with, but these appear to be a polyethylene. Even just a utility knife should easily cut these to size.

 

[yatg]

 

[charbar]

There ya go....if it'll cut a finger off it'll cut the risers

Those risers are so soft you can cut them with about anything. I use the cutter that came with my RapidAir Maxline kit.....they are 10 years old and dull as **** but still cut sprinkler risers absolutely fine.

 

[2manytools]

I use these exact ones for irrigation repairs. If I didn't get them as cheap as I did through Sears years back, I probably wouldn't have them, but yes, they are perfect for cutting risers cleanly