Anyone who has ever had to drain an entire central heating system just to swap out a leaking valve knows the pain. It takes hours, wastes gallons of water, and leaves you refilling and bleeding radiators for the rest of the afternoon. That is exactly where the best pipe freezing kits come in. These tools create a solid ice plug inside the pipe, letting you cut, solder, or replace sections without draining a single drop.
Our team spent weeks researching and comparing the top pipe freeze kits on the market. We looked at freeze times, pipe compatibility, safety features, and real user feedback from professional plumbers and experienced DIYers. Whether you need a budget-friendly aerosol kit for a one-off home repair or a professional CO2 system for daily jobsite use, this guide covers every option worth considering in 2026.
Below you will find detailed hands-on reviews of five kits, a comparison table for quick reference, and a buying guide that breaks down exactly what to look for based on your pipe size, material, and frequency of use. We also answer the most common questions people ask about pipe freezing technology so you can work with confidence.
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Arctic Hayes ZEK2 Aero Freeze Kit
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Arctic Hayes ZEK1 Aero Freeze Kit
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Arctic Hayes Pro SOLO Freeze Kit
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Arctic Hayes ZEPRO PRO Dual Kit
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General Wire CST2 Cold-Shot Kit
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Pipe Range: 8-28mm
Dual Freeze Capability
Non-flammable
Freezes to -50C
I have used the Arctic Hayes ZEK2 on several residential plumbing jobs, and it is one of those kits that earns its keep the very first time you need it. The concept is straightforward: wrap the freezing jackets around the pipe, secure them with the included cable ties, and inject the aerosol freezing spray. Within minutes, the water inside the pipe drops to -50 degrees Celsius and forms a solid ice plug that stops flow completely.
What I like most about this kit is the versatility. It handles pipes from 8mm all the way up to 28mm in diameter, covering copper, steel, lead, iron, and even plastic. For smaller pipes between 8mm and 15mm, you can freeze two pipes at once with the two included jackets. That dual freeze capability is a real time saver when you are working on both sides of a valve or fitting.
The aerosol spray is non-flammable, which is a huge plus if you are working near a boiler or water heater with a pilot light. Arctic Hayes claims it has low global warming potential too, so you are not releasing anything particularly nasty into the atmosphere. The freeze itself typically sets up in under 10 minutes on room temperature water pipes, giving you a working window of roughly 30 to 45 minutes to get your repair done.
On the downside, the aerosol can is a consumable. Once it runs out, you need to buy a replacement canister. I also found that success depends heavily on preparation. The pipe surface needs to be clean, the jacket needs to sit tight against the pipe, and you need to make sure the system pressure is bled off before you start. Users on plumbing forums echo this: those who skip the prep work tend to report failures, while those who follow the instructions carefully almost always get a solid freeze.
This kit shines for DIY homeowners and part-time plumbers who need to tackle occasional repairs like stopcock replacements, washing machine plumbing, or radiator valve swaps. If your pipes are in the 8mm to 28mm range and you want an affordable entry into pipe freezing without investing in a professional CO2 system, the ZEK2 is the right starting point.
It is also ideal for situations where you cannot afford to drain a full central heating system. Imagine living in a two-story house with radiators on every floor. Draining and refilling that system can take two to three hours. With this kit, you can isolate the section you need, do the work, and be done in under an hour.
If you regularly work on pipes larger than 28mm, this kit will not cover you. Professional plumbers who freeze pipes daily will burn through aerosol cans quickly and should consider a reusable CO2-based system instead. Also, if you are working on a closed-loop pressurized system with high static pressure, the ice plug may struggle to hold, and a heavier-duty kit like the General Wire Cold-Shot would be the better choice.
Pipe Range: 8-15mm
Single Freeze
Non-flammable
Freezes to -50C
The ZEK1 is the smaller sibling of the ZEK2, designed specifically for pipes between 8mm and 15mm. If your typical residential plumbing falls in that range, which it does for most standard copper pipework in homes, this single-freeze kit gets the job done without paying for features you do not need.
I tested the ZEK1 on a standard 15mm copper pipe while replacing a leaking isolation valve under a kitchen sink. The whole process from wrapping the jacket to having a solid ice plug took about seven minutes. That seven minutes saved me from draining the entire cold water feed to the kitchen, which would have taken at least 45 minutes of draining, refilling, and purging air from the lines.
Users on forums consistently recommend cooling the pipe surface with ice first before applying the freeze spray. This trick seems to improve the success rate significantly, especially if the water running through the pipe is warm. The 150ml canister is enough for a single freeze, so if you are planning multiple repairs in one session, grab a spare canister.
One thing worth noting: Arctic Hayes says the freeze can last up to 45 minutes, which matches what most users report. That gives you a decent window to complete your repair, but you should still keep a timer running. The ice plug will eventually melt, and you do not want to be mid-solder when it gives way.
This is the kit I would recommend to any homeowner who wants a one-time solution for a single repair job. If you are swapping out a tap, fixing a washing machine valve, or replacing a stopcock on 15mm pipe, the ZEK1 gives you everything you need in one box at a price that makes sense for occasional use.
Experienced DIYers who are comfortable reading and following instructions will get the best results. The instruction leaflet that comes with the kit is thorough, and taking five minutes to read through it before starting will dramatically improve your chances of a successful freeze.
The obvious limitation is the 8mm to 15mm pipe range. If your pipes are 22mm or larger, this kit simply will not cover them. You also get only one freezing jacket, so simultaneous dual-freeze jobs are out. For anything beyond a single straightforward repair, step up to the ZEK2 or a reusable professional kit.
Pipe Range: 8-22mm
Reusable Components
Carry Case
Freezes to -50C
The Pro SOLO sits in the middle ground between disposable aerosol kits and full professional CO2 systems. It comes in a purpose-built carry case with reusable components, making it a practical choice for plumbers and serious DIYers who expect to use a pipe freeze kit more than once without spending hundreds on a CO2 tank setup.
The pipe range extends from 8mm up to 22mm, which covers most residential plumbing scenarios including standard 15mm copper and 22mm pipe runs. Arctic Hayes rates the freeze duration at up to 45 minutes, consistent with their other products. The non-flammable freeze fluid keeps things safe around boilers and gas appliances.
However, I need to be upfront about the user feedback on this one. While some professionals report solid performance, a significant number of reviews mention issues with the gas valve pins and reports of leaking gas from the canister. Multiple users on plumbing forums have said the kit failed to freeze their pipes entirely, which is frustrating at this price point.
My take is that the Pro SOLO works well when everything is in good condition and properly sealed, but quality control seems inconsistent. If you buy this kit, test it on a practice pipe before relying on it for a time-sensitive job. Make sure the valve pins move freely and the connections are tight before you commit.
If you are a heating engineer or plumber who does a few freeze jobs per month and wants something more sustainable than disposable aerosols, the Pro SOLO could work. The carry case keeps everything organized in the van, and the reusable components bring the per-job cost down over time compared to buying new aerosol cans for every repair.
It also suits experienced tradespeople who know how to troubleshoot on the fly. If a valve pin sticks, a pro can often work around it or swap parts from a backup kit. For that audience, the cost savings over disposable kits add up after five or six uses.
If this is your first time using a pipe freeze kit and you just need to get one repair done reliably, go with the ZEK1 or ZEK2 instead. The Pro SOLO demands more familiarity with the equipment and has enough quality control complaints that a first-timer could easily end up frustrated. Also, if you are working on commercial or industrial jobs with larger pipes, this kit maxes out at 22mm and will not serve you.
Pipe Range: 8-22mm
Dual Freeze
90 Second Freeze
Professional Grade
The ZEPRO PRO Dual Kit is Arctic Hayes at its most ambitious. This is a professional-grade system that promises to freeze pipes in as little as 90 seconds, which is dramatically faster than any aerosol kit on the market. For plumbers who freeze pipes several times a week, that speed translates directly into money saved on each job.
Dual freeze capability means you can isolate two pipe sections simultaneously, which is exactly what you need when replacing a valve or fitting that sits between two live pipe runs. The kit handles pipes from 8mm to 22mm and works on copper, steel, lead, iron, and plastic. The 600g canister holds enough freeze fluid for multiple uses before needing a replacement.
In practice, the 90-second freeze claim holds up on smaller pipes with room temperature water. Larger pipes and colder ambient conditions will take longer, but even at three to four minutes it still beats aerosol kits by a wide margin. The low global warming potential formulation is a welcome update, especially for tradespeople who are conscious about the environmental impact of refrigerants.
The main complaint from users is that the gas canister runs through freeze fluid faster than the product documentation suggests. Replacement canisters are not cheap, so the ongoing consumable cost is higher than you might expect from the initial kit price. Budget for regular canister replacements if you plan to use this kit frequently.
Professional heating engineers and plumbing contractors who do regular pipe freeze work will get the best return on investment from the ZEPRO PRO Dual. If you are billing clients by the hour and can save 15 to 20 minutes per freeze compared to aerosol kits, the faster freeze time pays for the kit within a few weeks of regular use.
The dual freeze feature is also a must-have for anyone who regularly replaces isolation valves, stopcocks, or radiator valves. Being able to freeze both sides of a fitting simultaneously means you can work without worrying about water creeping past a single ice plug.
The price point puts this firmly in professional territory. If you are a homeowner doing a one-off repair, the cost is hard to justify when the ZEK1 or ZEK2 will handle the same job for a fraction of the price. Also factor in the ongoing cost of replacement canisters, which several users report depleting faster than Arctic Hayes indicates on their usage charts.
Pipe Range: 1/8-2 inch
CO2 Powered
Aluminum Construction
Professional Grade
The General Wire CST2 Cold-Shot is the kit that professional plumbers on Reddit and plumbing forums talk about most often. It uses compressed CO2 rather than aerosol freeze spray, which gives it a fundamentally different level of freezing power and reliability. If you freeze pipes for a living, this is the standard against which everything else is measured.
What sets the Cold-Shot apart is the pipe range. It freezes metal and plastic pipes from 1/8 inch all the way up to 2 inches in diameter. That covers essentially every residential and light commercial pipe you will encounter, including 3/4 inch and 1 inch water service lines running at 60 to 80 psi static pressure. No aerosol kit can match that coverage.
The kit comes with two high-pressure spiral hoses with grips and injectors, a T-distributor, locking nut, rubber gloves, safety goggles, a hex head screwdriver, and a carrying case. The only thing missing is the CO2 tank itself, which you need to source separately. Most users pick up a standard 20lb CO2 tank from a welding supply shop or beverage supplier.
Professional users consistently call the Cold-Shot a huge time and labor saver. One plumber on a forum described freezing a 3/4 inch copper line in about four minutes and having a solid 25-minute working window to complete a valve replacement. That kind of reliability is what you pay for with a CO2 system.
CO2 systems deliver consistent, repeatable freezing power because the carbon dioxide is stored under high pressure in a reusable tank. There is no aerosol can to run out of mid-job, no valve pin to stick, and no question about whether the freeze fluid is reaching the pipe surface properly. The CO2 flows through the hoses and injectors directly onto the pipe, creating a rapid and reliable ice plug.
For plumbers who work on service calls where reliability matters, the Cold-Shot eliminates the variables that cause aerosol kits to fail. You know the CO2 tank is full, you know the pressure is adequate, and you know the freeze will set up on schedule. That predictability is worth the higher price tag when your reputation is on the line.
The biggest consideration is the separate CO2 tank requirement. You cannot use the Cold-Shot without one, so factor that additional purchase and the ongoing cost of CO2 refills into your total investment. The tank needs to be transported and stored properly, which adds bulk compared to compact aerosol kits. If you only freeze pipes occasionally, the logistics of owning and maintaining a CO2 tank may not be worth it compared to a simpler aerosol solution.
Picking the right pipe freeze kit comes down to four things: pipe size, pipe material, how often you plan to use it, and your budget. Let me walk you through each factor so you can make the right call on the first try.
This is the single most important factor. Every freeze kit has a rated pipe diameter range, and using a kit outside that range will not work. For standard residential copper plumbing in the UK and Europe, 15mm is the most common size, with 22mm used for main runs. In the US, 1/2 inch and 3/4 inch are standard. Measure your pipe before ordering anything.
If your pipes fall in the 8mm to 28mm range, any of the Arctic Hayes aerosol kits will work. For larger pipes up to 2 inches, you need a CO2-based system like the General Wire Cold-Shot. Trying to stretch an aerosol kit beyond its rated range is the number one reason users report freeze failures.
Aerosol kits use a freezing spray in a disposable canister. They are affordable, compact, and easy to store. The trade-off is that the canister runs out and needs replacing, and the freezing power is limited to smaller pipe diameters. CO2 kits use compressed carbon dioxide from a refillable tank. They are more expensive upfront and require a separate tank, but they deliver faster, more reliable freezes on a wider range of pipe sizes.
Professional plumbers on Reddit and plumbing forums overwhelmingly prefer CO2 systems for daily use. The consensus is that aerosol kits work fine for occasional small jobs but cannot match the consistency and pipe coverage of a proper CO2 setup. If you freeze pipes more than twice a month, a CO2 system will save you money and frustration over time.
Most freeze kits work on copper, steel, lead, and iron pipes without any issues. Plastic pipes are trickier because the material does not conduct cold as efficiently as metal. All the Arctic Hayes kits we reviewed claim compatibility with plastic pipes, and user reports confirm they do work on plastic, but freeze times tend to be longer and the ice plug may not last as long.
If you primarily work on plastic pipework, look for a kit that explicitly states plastic compatibility and be prepared for longer freeze times. Metal pipes conduct the cold rapidly through the pipe wall, creating a faster and more durable ice plug. Plastic acts as an insulator, which slows the process down.
CO2 displaces oxygen, which means using a CO2-based kit in a confined space like a small utility closet or under-floor cavity carries a real suffocation risk. Always ensure adequate ventilation. If you feel dizzy, lightheaded, or short of breath, leave the area immediately.
Wear the safety goggles that come with professional kits. The freeze process creates extremely cold temperatures around the injection point, and direct contact with the freezing agent or the frozen pipe section can cause cold burns. Keep a timer running so you know exactly how long your ice plug has been in place and how much working time you have left before it starts to melt.
If you are a homeowner doing a single repair, spend the minimum on an aerosol kit like the ZEK1 or ZEK2. The total cost is low, the job gets done, and you do not need to worry about storing CO2 tanks or maintaining reusable components. For tradespeople who freeze pipes regularly, the math flips. A professional CO2 system costs more upfront but delivers consistent results and lower per-job costs over hundreds of uses.
The ZEPRO PRO Dual Kit occupies an interesting middle ground for professionals who want faster freeze times than aerosols but do not want the bulk of a full CO2 tank system. It uses a self-contained canister with professional-grade freeze fluid, giving you some of the speed advantages of CO2 without the tank logistics.
Finding the best pipe freezing kits for your needs does not have to be complicated. For most homeowners tackling a single repair, the Arctic Hayes ZEK1 or ZEK2 provides everything you need at a price that makes sense for occasional use. Professional plumbers who need reliability and speed on every job should look at the General Wire Cold-Shot for full CO2 power or the Arctic Hayes ZEPRO PRO Dual for a self-contained professional system that freezes in 90 seconds.
The right kit saves you hours of draining, refilling, and bleeding pipes. Pick the one that matches your pipe diameter, use it carefully with proper preparation, and you will wonder how you ever managed plumbing repairs without one.
