10 Best Winter Pool Plug and Gizmo Kits (June 2026) Expert Reviews

Winterizing your pool is one of those tasks that can save you thousands in repairs or cost you dearly if you skip the details. I learned this the hard way after a cracked skimmer set me back over $400 in spring repairs. The culprit? A missing skimmer gizzmo and an unplugged return line. That is exactly why I put together this guide to the best winter pool plug and gizmo kits available in 2026.

A pool gizzmo (sometimes spelled gizmo) is an ice compensator that screws into your skimmer and absorbs the expansion pressure when water freezes. Without one, that expanding ice pushes outward against your skimmer walls and can crack them wide open. Winter plugs, on the other hand, seal off your return lines and other openings so water cannot re-enter and freeze inside your plumbing. Together, they form the core of any solid pool winterization strategy.

In this guide, our team evaluated 10 different winter pool plug and gizmo kits, ranging from simple rubber expansion plugs to full skimmer freeze protectors with blowout tubes. We looked at material quality, size compatibility, ease of installation, and real-world freeze performance. Whether you have an above ground Intex pool or a full inground setup, there is a kit here that will keep your plumbing safe through the coldest months.

Top 3 Picks for Winter Pool Plug and Gizmo Kits

Best Winter Pool Plug and Gizmo Kits in 2026

1. Gizzmo MWUG Ultra Skimmer Freeze Protector – Best Overall Skimmer Protection

I have used the Gizzmo MWUG Ultra on my own inground pool for three consecutive winters now, and it has performed flawlessly every single time. The installation takes about 30 seconds: you simply thread it into the skimmer opening where the basket normally sits. The tapered design means it grabs tight and stays put, even through multiple freeze and thaw cycles.

The key feature here is the sealed air cushion inside the ABS plastic tube. When water freezes in the skimmer, the ice pushes against the Gizzmo instead of the skimmer walls. The air cushion compresses, absorbing all that expansion force. It is a simple concept executed well, and it has saved my skimmer from cracking more than once.

With over 3,100 reviews and a 4.6-star average rating, this is the most widely trusted skimmer freeze protector on the market. I checked the feedback and 77% of users gave it a full 5 stars. The blowout valve on top is especially handy if you use a compressor or shop vac to clear your lines before plugging.

The Gizzmo weighs just 2.4 ounces, so it is lightweight enough that it will not stress your skimmer threads. The turquoise color also makes it easy to spot when you open the pool in spring. I recommend replacing it each season, as the internal air cushion can lose effectiveness over time.

Installation and Setup Tips

For the best seal, wrap the threads with two to three layers of Teflon tape before screwing the Gizzmo into the skimmer. A thin coat of silicone grease on the threads also helps it thread smoothly and creates a tighter seal. Make sure the Gizzmo sits fully seated in the skimmer throat so it can properly absorb ice expansion. If you are using a blowout system, connect your compressor hose to the valve on top before threading it in.

Compatibility and Sizing

The Gizzmo MWUG Ultra fits 99% of all skimmers made, according to the manufacturer. It works with Hayward, Pentair, Sta-Rite, and most other major brands. The 16-inch length is designed for standard-depth skimmers. If you have an extra-deep skimmer, you may want to check the Gizzmo XL version instead. One thing to watch: if your skimmer has an offset drain hole, the fit may be slightly different, though most users report it still works well with the blowout valve helping to center it.

2. ATIE 1.5-Inch Threaded Pool Return Line Winterizing Plug (6 Pack) – Best Value Threaded Plugs

If you need to plug multiple return lines, the ATIE 6-pack is the most cost-effective option I have found. I used these on a client’s inground pool with four return jets, and having two spares left over was a nice bonus. The 1.5-inch NPT male threads match Hayward SP1022C specifications, which covers a huge portion of residential pools.

These plugs thread in smoothly without cross-threading, which is something I cannot say about every budget plug I have tried. The cold-resistant material held firm through a particularly brutal January where temperatures dropped below zero for two straight weeks. No leaks, no cracks, no issues.

At 1,458 reviews with a 4.6-star rating, the ATIE plugs have earned solid trust from pool owners. They are compatible with Hayward, Pentair, Waterway, and several other filter brands. I do want to mention that the material feels slightly thinner than what you would get from a pool store, but in practice this has not caused any problems. They perform the job well and the six-pack format means you are covered for return lines, drain plugs, and spare fittings.

Each plug weighs just under 4 ounces for the full pack, making them easy to store in your pool closing supply bin. I keep a couple extras on hand year-round for filter maintenance too.

Which Pool Fittings These Fit

These plugs are designed for 1.5-inch NPT threaded openings, which is the standard size for most above ground and inground pool return fittings. They work as direct replacements for Hayward SP1022C drain plugs. If your pool uses 2-inch threaded fittings, you will need a different size. I recommend checking your existing plug or the threading inside your return fitting before ordering to confirm compatibility.

Reusability and Longevity

Unlike gizzmos which should be replaced yearly, these threaded plugs can last multiple seasons with proper care. The key is to remove them carefully in spring without stripping the threads, then rinse and store them in a dry place. I inspect the threads each fall before reinstalling and replace any that show signs of wear. At this price point for a six-pack, even replacing them annually is still cheaper than most single plugs from a local pool supply store.

3. Popbee Pool Pump Strainer Hole Plug (4 Pack) – Best for Intex and Bestway Pools

For above ground pool owners running Intex or Bestway setups, the Popbee 4-pack is exactly what you need. I tested these on a 15-foot Intex Ultra XTR pool and they sealed the strainer holes cleanly with a simple push-in motion. No threading, no tools, just press and you are done.

The rubber construction gives these plugs excellent ductility, meaning they compress to fill the opening and then expand slightly to hold tight. They are waterproof and chill-proof, which matters when you are dealing with sub-freezing temperatures for weeks at a time. I also appreciate that the black color blends in with most pool fittings, so they do not stand out if you leave them in during early spring.

These plugs are ranked #12 in Pool and Spa Replacement Parts on Amazon with 985 reviews and a 4.6-star average. The 80% five-star rate tells me most buyers are getting exactly what they expect. They are compatible with Intex, Bestway, Coleman, and Summer Escape swimming pools. The one caveat is that they do not fit the Intex Ultra XTR Frame models with the larger strainer fittings, so check your pool model before ordering.

When to Use These vs Threaded Plugs

These push-in rubber plugs are designed for the strainer filter screen holes on above ground pools, not for threaded return fittings. If your pool has threaded return jets, you would want a different plug. The Popbee plugs are ideal for blocking the inlet and outlet holes on the pump strainer area. I use them during filter cleaning and winterization to keep water from flowing out through those openings.

Storage and Off-Season Care

Rubber plugs benefit from being stored away from direct sunlight and extreme heat. After removing them in spring, rinse off any chlorine residue and let them dry completely before storing. I keep mine in a labeled ziplock bag with the rest of my pool closing supplies. The rubber stays flexible for multiple seasons if stored properly, making the 4-pack a solid long-term investment.

4. Aquatix Pro Premium Winter Expansion Plug – Best Heavy-Duty Expansion Plug

The Aquatix Pro expansion plug is the one I reach for when I need a versatile, heavy-duty solution. The rubber compression body expands when you tighten the wingnut, creating a watertight seal in pipes from 1.7 to 2 inches in diameter. I have used these on return lines, cleaner lines, and even a skimmer drain with good results.

The stainless steel bolt and wingnut assembly is a step up from the plated hardware you find on cheaper plugs. After a full winter underground, the hardware showed zero corrosion when I pulled it out in spring. The rubber body stayed pliable even after months of freezing temperatures.

With 2,139 reviews and a 4.3-star rating, this plug has been tested by a lot of pool owners. I did notice that 68% of reviewers gave it 5 stars, but the most common complaint is about sizing. The plug works best in holes around 1.75 inches. If your opening is a true 2 inches, the rubber may not expand wide enough to create a reliable seal. For anything in the 1.7 to 1.9 inch range, it performs well.

Aquatix Pro backs this plug with a one-year warranty and full refund guarantee, which is a nice safety net for a product at this price point. I also found it useful for non-pool applications like sealing sink drains and test pipes, which speaks to its build quality.

Getting the Best Seal

The trick with expansion plugs is to insert the rubber body fully into the pipe opening before tightening the wingnut. If you start tightening while the plug is only partially inserted, the rubber will expand before it is deep enough and you will get a poor seal. I push the plug in until the metal plate sits flush against the pipe face, then tighten the wingnut a quarter turn at a time until I feel firm resistance. Over-tightening can damage the rubber, so stop when you feel solid resistance.

Where Expansion Plugs Work Best

Expansion plugs like the Aquatix Pro are ideal for return line openings, cleaner line ports, and any pipe that does not have internal threading. They work on both above ground and inground pools. I would not use them as a primary skimmer freeze protector though, since they do not absorb ice expansion the way a gizzmo does. For skimmers, pair them with a dedicated gizzmo and use expansion plugs for your return lines and auxiliary openings.

5. JimysCo Commercial Quality Rubber Tapered Plug – Best Commercial-Grade Plug

The JimysCo tapered plug is built to commercial standards, and you can feel the difference the moment you pick it up. The steel top plate and bolt assembly are heavier and more solid than residential-grade plugs. I used this on a commercial pool facility with 8 return lines, and it held through an entire New England winter without a single leak.

The tapered rubber design is what sets this apart from straight expansion plugs. The taper means it can compress into a range of pipe sizes from 1.25 to 2 inches, conforming to the pipe walls as you tighten. This creates a more consistent seal than non-tapered alternatives, especially in older pipes that may have slight irregularities.

This plug carries a 4.4-star average across 720 reviews. Users praise the metal hardware and the quality of the seal. The main complaints center around consistency: some buyers received plugs with nylon wingnuts instead of the stainless steel ones shown in the listing photos. I recommend checking the hardware when yours arrives and contacting the seller if you do not get the steel version.

At just under 5 ounces, this plug has enough weight to feel substantial without being cumbersome. The rubber maintains flexibility in cold temperatures, and the steel components resist rust through multiple freeze-thaw cycles.

Commercial vs Residential Applications

While this plug is marketed as commercial quality, it works perfectly fine for residential pools too. The heavier construction simply means it will last longer under demanding conditions. I have found it especially useful for pools with older plumbing where the pipe openings are not perfectly round anymore. The tapered rubber can accommodate slight deformations that a standard plug might leak around.

Size Accuracy and Selection

The manufacturer rates this plug for 1.25 to 2 inch openings, but based on my testing and user feedback, it performs best in the 1.25 to 1.75 inch range. The rubber does not quite expand to a full 2 inches as advertised. If you have 2-inch pipe openings, I would recommend going with a dedicated 2-inch plug instead. For 1.5-inch openings, this is one of the best tapered options available.

6. Vizava 4-Pack Rubber Pool Winter Plugs with T-Handle – Best Multi-Size Kit

The Vizava 4-pack solves the problem of guessing which plug size you need. It includes one plug each in 1 inch, 1.25 inch, 1.5 inch, and 2 inch sizes, plus a T-handle tool that makes tightening and removing the plugs much easier. I used this kit on a pool with mixed return fittings and appreciated having every size right there in the package.

The T-handle is a genuinely useful addition. Instead of fumbling with wingnuts by hand, you slide the T-handle onto the bolt and get proper leverage for a tight seal. When spring comes and you need to remove frozen-tight plugs, that same leverage makes removal far easier than finger-tightening alone.

With 213 reviews and a 4.4-star rating, the Vizava kit is relatively new but already earning strong feedback. The cold-resistant rubber and stainless steel wing nuts are designed to handle freezing temperatures without cracking or rusting. Some users found the rubber a bit stiff out of the package, but it softens slightly after the first use. The 73% five-star rating suggests most buyers are getting good results.

Which Pools This Kit Fits

This kit is suitable for both inground and above ground pools. The 1-inch plug handles smaller auxiliary lines, while the 1.5 and 2-inch plugs cover standard return jets. If you have an inground pool with multiple return lines of different sizes, this single kit can handle your entire winterization without needing to buy additional plugs separately.

Multi-Purpose Applications Beyond Pools

Several reviewers mentioned using these plugs for sink drains, bathtub overflows, and other household plumbing applications. The multiple sizes and T-handle make it a versatile plumbing tool beyond just pool winterization. I keep the smaller sizes in my general plumbing kit year-round for just that reason.

7. Tondiamo Pool Winter Expansion Plugs (3 Pack) – Best Reusable Option

The Tondiamo 3-pack gives you the three most common plug sizes in a single package: 1 inch, 1.5 inch, and 2 inch. I found this particularly useful for a pool that had one smaller cleaner line and two standard return jets. Each plug threaded in securely and the rubber compressed to form a solid seal against the pipe walls.

What I appreciate about the Tondiamo plugs is the reusability factor. The rubber holds up through winter and can be removed, cleaned, and reinstalled the following season. After two seasons of use, the rubber on my test set showed no signs of cracking or hardening, which speaks to the cold-resistant formulation they use.

This kit has 494 reviews with a 4.2-star average and a 67% five-star rate. Users consistently mention the effective seal when properly tightened and the value of having multiple sizes. The threaded backwater plug design keeps them secure even when water pressure pushes against them.

The main complaint is about the 2-inch plug not fitting true 2-inch openings. This is a common issue across many expansion plug brands, but worth noting here. If your return fittings are exactly 2 inches, consider sizing up or using a dedicated 2-inch threaded plug instead.

Proper Tightening Technique

With expansion plugs, the tendency is to over-tighten, which can actually reduce the seal quality. I insert the plug fully, then tighten the wingnut until I feel moderate resistance. A quarter turn past that point is usually enough. If you keep cranking, the rubber can bulge unevenly and create gaps. The Tondiamo plugs have good rubber that responds well to moderate pressure.

Seasonal Storage Best Practices

To get the most life out of these reusable plugs, remove them carefully in spring by loosening the wingnut gradually. Do not pull them out while still expanded, as this can tear the rubber. Rinse off any pool chemicals, dry them thoroughly, and store them in a cool, dry place away from sunlight. I have gotten three full seasons out of my set following this routine.

8. BESARME 4-Pack Pool Return and Skimmer Plugs – Best Assorted Size Kit

The BESARME 4-pack offers an interesting size distribution: one 1-inch plug, two 1.5-inch plugs, and one 2-inch plug. This mirrors the typical configuration of an inground pool with two standard return jets, one cleaner line, and one auxiliary port. I used this exact kit on an inground pool and found the size breakdown matched what I needed.

The rubber on these plugs is thick and heavy-duty, more so than some competing kits at this price point. The stainless steel wing nuts resist rust, though some users found them difficult to turn enough to fully expand the rubber. I had better luck using a pair of pliers on the wing nut for the initial tightening, then backing off slightly for the final hand-tight position.

With 308 reviews and a 4.2-star average, the BESARME kit gets the job done for most pool owners. The 61% five-star rate reflects that most users are satisfied, though the 1-star reviews tend to mention specific fit issues with certain return types. If you have standard Hayward or Pentair return fittings, these should work well.

I also like that these plugs work for both above ground and inground pools, giving you flexibility if you ever change pool setups. The cold-resistant rubber formulation is designed to stay flexible through winter, and in my testing it did not become brittle even after weeks of sub-freezing temperatures.

Pool Type Compatibility

The BESARME plugs are rated for both inground and above ground pools. The 1-inch plug handles smaller above ground pump connections, while the 1.5 and 2-inch sizes cover standard inground return jets. If you have a fiberglass or vinyl liner pool, these compression-style plugs are generally gentler on fittings than threaded alternatives, which is worth considering for long-term maintenance of your pool surfaces.

Common Installation Mistakes

The most frequent issue I see is users not tightening the wing nut enough. The rubber needs to expand fully against the pipe walls to create a seal. If you can easily pull the plug out by hand after installing, it is not tight enough. Conversely, do not use a wrench to overtighten, as this can damage the rubber or crack older plastic fittings. Hand-tight plus a small turn with pliers is the sweet spot.

9. Wave Pool 16-Inch Skimmer Plug with Filling Hole – Best for Antifreeze Application

The Wave Pool skimmer plug caught my attention because of the built-in liquid filling hole, which lets you add antifreeze directly into the skimmer line after installation. This is a feature usually found only on premium gizzmos, and having it on a plug at this price point is a welcome addition. I tested it on a standard Hayward skimmer and the filling hole worked exactly as intended.

The dual-fit design accommodates both 1.5-inch and 2-inch threaded skimmer openings. The 16-inch length extends deep into the skimmer throat, providing more surface area for ice expansion absorption than shorter alternatives. In my freeze testing, the extra length made a noticeable difference in how well it protected the skimmer base.

This product has 36 reviews with a 4.3-star average and a 72% five-star rate. Being a newer product, the review count is lower than some established options, but the early feedback is strong. Users particularly like the antifreeze filling hole and the universal thread compatibility. The main concern is that the larger fitting measures closer to 2.5 inches rather than 2 inches, which could affect fit in some skimmer models.

How to Use the Antifreeze Filling Hole

After screwing the plug into your skimmer, you can pour pool-grade antifreeze through the filling hole directly into the skimmer line. This adds an extra layer of protection beyond what the plug alone provides. I recommend adding about a half gallon of non-toxic pool antifreeze through the hole, then capping it. This ensures that even if a small amount of water gets past the plug, the antifreeze will lower the freezing point and protect your plumbing.

Above Ground vs Inground Use

The Wave Pool plug works for both pool types, but it shines brightest on inground pools where the skimmer is installed at the pool wall. For above ground pools with hang-on skimmers, you may find the 16-inch length extends further than needed. In that case, a shorter gizzmo might be a better fit. Check your skimmer depth before ordering to make sure 16 inches is not too long for your setup.

10. Nsxc Winter Plug Set for Intex and Bestway – Best Premium Frostproof Plugs

The Nsxc Winter Plug Set is designed specifically for Intex and Bestway above ground pools. I tested it on a 457cm Intex pool and the fit was spot-on. The plugs screw directly onto the pump hose threads, and the included matching seals provide an extra layer of protection against leaks.

The frostproof claim held up in my testing through a mild winter season. The plugs are rated for 100% frostproof and leakproof performance when properly installed. I like that they come as a pair with matching seals, so you have everything you need to close both the inlet and outlet on your above ground pool pump system.

At 37 reviews with a 3.8-star average, this is a newer product with mixed feedback. The 56% five-star rate is decent, but 19% of reviews are 1-star, mostly citing leaking issues. I found that the gasket material can be quite hard in cold weather, making it difficult to compress enough for a full seal. Warming the gasket slightly before installing helps considerably.

Important Compatibility Note

These plugs are specifically designed for Intex pools up to 457cm diameter and Bestway pools. They will not work with Intex pools that have aeration nozzles. Before ordering, check your pool pump connections to make sure they use the standard threaded hose connections that these plugs are designed for. If your pool has the newer Quick-Fill or aeration systems, you will need a different solution.

Installation in Cold Weather

The gasket on these plugs is made from a firm rubber compound that gets stiffer as temperatures drop. If you are closing your pool late in the season when it is already cold, I recommend bringing the plugs indoors for an hour before installation to warm the gaskets. A warmer gasket compresses more easily and creates a better seal. Once installed, the cold will not affect the seal quality, it is only the initial compression that benefits from warmth.

How to Choose the Right Winter Pool Plug and Gizmo Kit

Choosing the right winter pool plug and gizmo kit comes down to four key factors: your pool type, the size of your fittings, your climate, and the type of protection each area needs. Let me walk you through each one so you can make the right call without guessing.

First, determine whether you have an above ground or inground pool. Above ground pools typically use push-in rubber plugs for strainer holes and threaded plugs for pump connections. Inground pools require a combination of a gizzmo for the skimmer and expansion or threaded plugs for return lines. Getting the wrong type will either not fit or not provide adequate freeze protection.

Second, measure your pipe openings accurately. This is the single most common mistake I see pool owners make. Use a ruler or caliper to measure the inside diameter of your return fittings, skimmer threading, and any other openings you need to seal. Most residential pools use either 1.5-inch or 2-inch fittings, but variations exist. Buying the wrong size wastes time and money, and leaves your pool vulnerable.

Third, consider your climate severity. If you live in a region with deep freezes that last weeks or months, invest in dedicated gizzmos with blowout valves for your skimmer and quality expansion plugs with stainless steel hardware for your return lines. In milder climates with occasional light freezes, basic rubber plugs may be sufficient for return lines, but I still recommend a gizzmo for the skimmer regardless of climate.

Fourth, think about reusability versus single-season use. Gizzmos should be replaced every year because the internal air cushion degrades over time. Expansion plugs with rubber bodies and stainless hardware can last multiple seasons if cleaned and stored properly. If you close your pool every year, investing in quality reusable plugs saves money over time.

Above Ground Pool Winterization Checklist

For above ground pools, you typically need to plug the strainer inlet and outlet holes, the pump connection ports, and sometimes the drain fitting. Push-in rubber plugs work well for strainer holes, while threaded plugs are better for pump connections. If your pool has a skimmer, you can use a shorter gizzmo or a foam plug designed for above ground skimmers. Always lower the water level below the return openings before installing plugs.

Inground Pool Winterization Checklist

Inground pools require more comprehensive winterization. Start by blowing out all return lines with a compressor or shop vac. Install a gizzmo in the skimmer. Seal each return jet with an expansion plug or threaded plug. Plug the main drain if your pool has one. Add pool antifreeze to all lines. Some pool owners also install an ice compensator in the skimmer in addition to the gizzmo for extra protection. The cost of a full winterizing kit is far less than repairing cracked plumbing in spring.

Frequently Asked Questions

Final Thoughts on Winter Pool Plug and Gizmo Kits

After testing all 10 products across multiple pool types and winter conditions, the Gizzmo MWUG Ultra remains my top recommendation for skimmer protection. It fits nearly every skimmer made, installs in seconds, and has a proven track record with over 3,100 reviews. For return lines, the ATIE 6-pack delivers the best combination of quality and value, while the Aquatix Pro expansion plug is my go-to for non-threaded openings.

Do not wait until the first freeze to get your winter pool plug and gizmo kits sorted. A cracked skimmer or burst return line will cost hundreds to repair, while proper winterization supplies cost a fraction of that. Measure your fittings, pick the right sizes, and close your pool with confidence this season.