For pipe in tight spaces, get a compact hacksaw like the Klein 31432, which Klein says cuts thin-wall copper, PVC, PEX and ABS; for steel pipe, rod and bolts, use a 12-inch high-tension frame like the Milwaukee 48-22-0050. Use a fine 24 TPI blade on thin-wall copper.
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This guide covers hand hacksaws for plumbing work.
Hacksaws compared (maker specs)
| Saw | Blade and size | Choose it when |
|---|---|---|
| Klein 31432 compact | 10 in. x 24 TPI bi-metal, 0.8-in. throat, 8 oz | Cutting pipe in a vanity, wall or crawl space |
| Milwaukee 48-22-0012 compact | 10 in. bi-metal, tool-free blade change, 0.6 lb | A light second saw for the tool bag |
| Milwaukee 48-22-0050 high-tension | 12 in. bi-metal, 45° flush-cut position, stores 6 blades | Cutting steel pipe, rod and bolts all day |
Plumbers reach for a hacksaw when a tubing cutter will not fit or will not cut the material: a pipe tight against a wall, a rusted bolt, threaded rod, a stuck nipple to cut out, or plastic pipe in a cramped space.
Klein 31432: compact saw for pipe in tight spaces
Choose the Klein 31432 for plumbing pipe in tight spots. Klein lists (kleintools.com) a compact medium-cut hacksaw with a 10-inch, 24 TPI bi-metal blade, a tool-free lever for blade length and changes, a blade that extends past the support arm for flush cuts, and a 0.8-inch throat. Klein says it cuts most thin-wall copper and aluminum, PVC, PEX and ABS pipe, and wood, and weighs 8 ounces.
Klein’s warnings call for approved eye protection and say not to use it near live electrical circuits.
On October 15, 2026, the standard new offer sold by Amazon.com showed stock with model 31432.
Check Klein 31432 compact hacksaw on Amazon →
Milwaukee 48-22-0012: light compact hacksaw
Choose the Milwaukee 48-22-0012 as a light bag saw. Milwaukee lists (milwaukeetool.com) a 10-inch compact hacksaw with a bi-metal blade, tool-free blade changes, an adjustable blade length for easier flush cutting, a rubber overmold grip and a weight of 0.6 pounds, and says it is great for cutting copper tubing, metal bolts and small PVC.
On October 15, 2026, the standard new offer sold by Amazon.com showed stock with model 48-22-0012.
Check Milwaukee 48-22-0012 compact hacksaw on Amazon →
Milwaukee 48-22-0050: 12-inch high-tension frame
Choose the Milwaukee 48-22-0050 for heavier metal cutting. Milwaukee lists (milwaukeetool.com) a 12-inch high-tension hacksaw with a reinforced metal frame, a high-leverage tension knob, a 45-degree blade position for flush cuts, internal storage for up to six extra blades, an overmolded handle and a weight of about 1.7 pounds, with a limited lifetime warranty.
A full-size frame held at high tension generally keeps the blade straighter in steel pipe and threaded rod than a compact saw, which has a short throat and lighter frame.
On October 15, 2026, the standard new offer sold by Amazon.com showed stock with model 48-22-0050.
Check Milwaukee 48-22-0050 high-tension hacksaw on Amazon →
Pick the right blade
Teeth per inch (TPI) matters more than the frame. A common rule is to keep at least three teeth in the material at once: fine blades for thin walls, coarser blades for thick, solid stock.
- Thin-wall copper and tubing: a fine blade, like the 24 TPI blades Klein and Milwaukee ship, so teeth do not catch on the thin wall.
- Steel pipe, rod and bolts: 18 or 24 TPI bi-metal, depending on wall thickness.
- PVC and ABS: a 24 TPI blade cuts cleanly; deburr the inside edge after.
Install the blade with the teeth pointing away from the handle so the saw cuts on the push stroke.
Replace a blade when it starts to wander or needs heavy pressure; a dull blade is the most common reason a hacksaw cut goes crooked. Bi-metal blades flex rather than shatter, which Klein highlights for its blade, and are the better choice for a plumber’s bag than all-hard carbon blades. Keep spares; the Milwaukee 12-inch frame stores up to six in the handle.
Hacksaw, tubing cutter or reciprocating saw?
For a square cut on copper, a tubing cutter is faster and cleaner; our pipe cutter guide covers them, and our PEX cutter guide covers plastic tubing. Use a hacksaw where a cutter will not fit around the pipe or the material is not round.
For lots of cutting or thick cast iron, a power saw saves your arm; our reciprocating saw guide and cast iron pipe cutter guide cover those.
Getting a straight cut
Mark the pipe all the way around, start the cut with light strokes on the far side of the line, and let the saw do the work on the push stroke. Use long, steady strokes with the full blade rather than short, fast ones, which heat and dull the middle teeth.
On plastic pipe, a light touch matters: fast, heavy strokes melt and tear PVC and ABS and leave a ragged edge. Slow down near the end of the cut and support the offcut so it does not snap off and crack the pipe wall. For PEX, a dedicated PEX cutter gives the square cut that fittings need, so use the hacksaw only when nothing else fits.
Clamp the work when you can. For pipe already installed, hold it steady so it does not flex, and support the free end so it does not pinch the blade as you finish.
Deburr the cut before joining; our deburring tool guide covers tools for copper.
Flush cuts and close quarters
Both compact saws here let the blade extend past the frame, which lets you cut a pipe or bolt flush with a wall or floor. The Milwaukee 12-inch frame sets the blade at 45 degrees for the same reason. Protect finished surfaces with tape, since the blade will scratch tile or a tub as it finishes the cut.
Working safely
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Cutting out an old fitting is a common hacksaw job: a corroded galvanized nipple, a seized compression nut or an old cast iron hub bolt. Cut beside the fitting, not into it, and keep the blade square so you leave enough clean pipe for the new connection. On galvanized pipe, cut past any corroded, thinned section so the new fitting threads or couples onto sound pipe.
For larger cast iron drain pipe, a hacksaw is slow; a snap cutter or a reciprocating saw with a carbide or diamond blade is the usual choice, as our cast iron cutter guide explains.
Wear eye protection, as Klein’s warnings say; blade teeth and chips can fly, and a blade can snap. Check for live wiring before cutting near electrical boxes or in walls. Keep your free hand behind the cutting line, and do not cut a pressurized pipe: shut off and drain the line first.
Frequently asked questions
What is the best hacksaw for cutting pipe in tight spaces?
A compact hacksaw such as the Klein 31432 or Milwaukee 48-22-0012, whose blades extend past the frame for flush cuts.
What TPI hacksaw blade for copper pipe?
A fine blade, such as 24 TPI, so several teeth stay in contact with the thin wall.
Can a hacksaw cut PVC and PEX?
Yes. Klein says its 31432 cuts most PVC, PEX and ABS pipe; deburr the edge afterward.
Which way do hacksaw blade teeth face?
Away from the handle, so the saw cuts on the push stroke.
Is a high-tension hacksaw worth it?
For steel pipe, rod and bolts, yes; higher tension keeps the blade straighter. Milwaukee’s 48-22-0050 uses a high-leverage tension knob.
How we chose
This document-based guide makes no hands-on testing claim. We read Klein’s page for the 31432 and Milwaukee’s pages for the 48-22-0012 and 48-22-0050. On October 15, 2026, all three linked standard new offers were sold by Amazon.com and showed stock. Read our selection method and about Plumbing Picks.
Primary sources
- Klein Tools 31432 Compact Medium-Cut Hacksaw (kleintools.com): 10 in. 24 TPI blade, flush cut, materials, specs, warnings.
- Milwaukee 48-22-0012 Compact Hack Saw (milwaukeetool.com): 10 in. blade, tool-free change, weight, materials.
- Milwaukee 48-22-0050 12 in. High Tension Hacksaw (milwaukeetool.com): tension knob, 45° position, blade storage, warranty.