RIDGID RP 251 vs Milwaukee M12 & M18 Press Tools: Which to Buy

A press tool is the biggest single purchase most plumbers make after a drain machine, and the RIDGID-versus-Milwaukee question is the one I get asked most at the supply counter. Both companies make genuinely good tools now — you are not going to buy a bad one. What you can do is buy the wrong one for your work, or walk out having spent extra on a jaw you did not budget for.

Here is the comparison, and the two details that actually decide it.

The short answer

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The three tools, side by side

The price-tier row is relative positioning between these three tools only. Press tool pricing swings hard depending on seller and Amazon sets it — use the links for current figures rather than any number in an article.

Milwaukee M12 Force Logic (2473-22) — the one most shops should buy

This is by a wide margin the most-bought press tool of the three, and it has by far the deepest pile of real-world owner feedback behind it — the RP 251 and the M18 are both far newer and far less proven in the field. When I weigh a tool I have not personally run for years, that is not nothing.

It is 3.8 lb, 12V, and it does the work most of us actually do. Two honest cautions:

• The kit is 1/2″ to 1″. Read that again before you buy, because the tool is often described as a 1-1/4″ tool. It will press 1-1/4″ — with the 1-1/4″ M12 jaw, which is a separate purchase. Budget for that jaw if you need 1-1/4″, which on a repipe you often will.
• It does not love the cold. A 12V tool working outdoors in a Georgia January is slower than the same tool in July. Keep it in the van, not the truck bed.

Check the Milwaukee M12 Force Logic price on Amazon →
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RIDGID RP 251 — the better kit, and the better service story

The RP 251 is RIDGID’s compact in-line tool and it is the lightest of the three at 3.6 lb — marginally under the M12, and you feel it overhead on a long day more than the 0.2 lb suggests.

What it actually presses, from RIDGID’s own specification: up to 1-1/4″ on copper and stainless, up to 1-1/2″ on PEX, and up to 1″ on carbon steel. That PEX and carbon steel capability is real breadth the M12 kit does not have, and it ships with rings, jaws and the C1 actuator in the box.

Two features that matter more than the marketing suggests:

• Over 60,000 press cycles with no scheduled maintenance, on a brushless motor, and 140 presses per charge. Press tools have historically been calibration-and-service items; a tool that publishes a 60,000-cycle interval is telling you something about ownership cost, not just runtime.
• Bluetooth via the RIDGID Link app, which reports press-cycle count, service interval, battery status and tool locking. Cycle count is the one that matters — it is how you know where you actually are against that service interval instead of guessing, and tool locking is genuinely useful if your tools live on a shared van.

The 360-degree swivel head is not a gimmick either. Pressing a joint tight to a joist bay is where the in-line design earns the money.

It sits in the middle on price, but compare like for like: M12 plus the 1-1/4″ jaw still gets you no PEX and no steel. The RP 251 is more tool for more money, not a worse deal.

One thing to check before you click buy: the RP 251 sells as two different kits. The 78208 linked above includes ProPress rings and jaws plus the C1 actuator. There is also a 78148 kit with ProPress jaws only. If you do not need rings and the actuator, the 78148 is a materially cheaper way into the same tool — read the kit contents on the listing rather than assuming, because the two look nearly identical in search results.

Check the RIDGID RP 251 price on Amazon →
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Milwaukee M18 Force Logic — only if you go past 1-1/4″

The M18 Standard Press Tool with ONE-KEY covers 1/2″ to 4″, which is the whole reason to consider it. It is the most expensive of the three by a clear margin, and it is new enough that there is not much crowd wisdom to lean on yet.

Buy it if you do commercial work, large-diameter mains, or steel. For a residential-only van it is more tool than the work justifies, and you will carry the extra weight every day for capacity you use twice a year.

Check the Milwaukee M18 Force Logic price on Amazon →
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If you are about to commit to a press platform, I send an occasional note when these tools change. Your email, nothing more.

The thing that should actually decide it: batteries

Everything above is secondary to one question — what batteries are already in your van?

A one-van shop running Milwaukee for drills, sawzalls and lights should buy the M12 almost regardless of the spec comparison. You already own chargers and spare packs, everything runs off one platform, and a dead battery on a Friday afternoon is a swap instead of a problem. The same logic runs the other way for a RIDGID shop.

Buying a press tool on a fourth battery platform to save a couple of hundred dollars is a false economy. I have watched it play out: the odd-one-out tool is the one that is always flat.

What actually goes wrong with press tools

• Jaws, not tools. The tool body rarely fails. Jaws wear, and a worn or contaminated jaw makes an incomplete press. Keep the jaw profile clean — copper swarf and flux residue build up in there.
• Skipping the service interval. A press tool that has drifted out of calibration still makes joints that look pressed. That is the dangerous failure mode, and it is exactly why the RP 251’s cycle counter is worth having.
• Bad tube prep, blamed on the tool. Most “the press tool failed” calls I have seen were a burr on the tube end nicking the O-ring. Cut square and deburr — a pressed joint will not forgive what a soldered one would.
• A joint that is out of spec, not out of order. Whatever tool you press with, the joint has to meet ASME B16.51, which rates copper press-connect fittings at 200 psi from 32°F to 200°F. A tool that is out of calibration is what quietly puts you outside that.
• The forgotten press. On a big job, mark each joint as you press it. An unpressed joint looks finished and holds fine until the system is charged.

Who should buy which

• Already on Milwaukee batteries, residential: M12, and budget the extra jaw if you press 1-1/4″.
• Starting fresh, residential and light commercial: RP 251 — best kit contents, lightest, best service transparency.
• Commercial, 2″ and up, or steel: M18.
• Not sure press is your method yet: read press vs soldering before spending anything. And once you have the tool, the fittings are the ongoing cost.

Frequently asked questions

Does the Milwaukee M12 press tool do 1-1/4 inch copper?

The tool will, but the 2473-22 kit will not out of the box — it is a 1/2 inch to 1 inch kit. The 1-1/4 inch M12 jaw is a separate purchase, so budget for it if 1-1/4 inch is part of your work. The RIDGID RP 251 kit includes jaws and rings to 1-1/4 inch in the box.

Is the RIDGID RP 251 better than the Milwaukee M12?

As a kit, yes — it is lighter at 3.6 lb versus 3.8 lb, it reaches 1-1/4 inch copper without buying an extra jaw, and it adds PEX to 1-1/2 inch and carbon steel to 1 inch that the M12 kit does not cover. As a purchase, the M12 usually wins for anyone already on Milwaukee batteries, and it has far more real-world use behind it.

How often does a press tool need servicing?

RIDGID specifies over 60,000 press cycles with no scheduled maintenance on the RP 251, and its Bluetooth app reports your actual cycle count and service interval. Do not ignore it. A press tool that has drifted out of calibration still produces joints that look correct, which is the failure mode worth worrying about.

Which press tool is best for tight spaces?

The RP 251, narrowly. It is the lightest at 3.6 lb and has a 360 degree swivel head, which is what you want when the joint is tight against a joist bay. The M12 is close behind and also compact — both are far easier overhead than the M18.

Should I buy a press tool on a different battery platform to save money?

No. Whatever batteries are already in your van should carry most of the weight in this decision. The odd-one-out tool on a fourth platform is the one that is always flat when you need it, and the few hundred dollars saved does not cover that.

Sources

• ASME B16.51 — Copper and Copper Alloy Press-Connect Pressure Fittings — the 200 psi / 32–200°F rating a pressed joint must meet.
• Manufacturer specifications read from the current Amazon product listings, August 2026. RP 251 capacities, cycle life, presses per charge and Bluetooth features are from RIDGID’s own published product specification.
• Press tool pricing varies widely by seller and moves constantly — use the links above for current pricing. We do not print prices here, because any figure we printed would be wrong by the time you read it.

Written and reviewed by Isaac Daniels, a licensed Georgia plumber (journeyman license #JP507711).

For the plumbers reading this

Most of this site is written for homeowners — this page clearly isn’t. If you’re in the trade and want the occasional straight-shooting note when I publish something like this (fittings comparisons, tool tests, code changes), drop your email. No spam, no course funnel, written by a licensed GA journeyman.