6 Best Heavy Duty Stock Tank Heaters for Winter

There’s a special kind of dread that comes with seeing a thick sheet of ice covering your stock tank on a frigid morning. You know your animals are thirsty, and you’re facing another round of hauling buckets or smashing ice with a sledgehammer. A reliable stock tank heater isn’t a luxury; it’s a critical piece of equipment that ensures your livestock stay hydrated, healthy, and productive through the harshest months.

09/21/2026 04:39 am GMT

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Why a Heavy-Duty De-Icer is Non-Negotiable

You can’t overstate the importance of constant access to water. Livestock that can’t drink won’t eat, and an animal that stops eating in the dead of winter is an animal in trouble. Dehydration leads to weight loss, reduced milk production, and a higher risk of serious health issues like colic in horses.

This is where the difference between a cheap de-icer and a heavy-duty heater becomes starkly clear. A cheap unit might keep a small hole open in mild weather, but it will fail when a real cold snap hits. A heavy-duty heater is built to withstand abuse—from curious goats trying to chew the cord to the relentless freeze-thaw cycle that cracks lesser materials.

Think of it as insurance. A quality heater has features like a chew-resistant cord, a durable thermostat that won’t quit, and a rugged housing that can take a kick from a cow. Investing in a solid unit means you’re not just buying convenience; you’re buying peace of mind and preventing future vet bills.

Farm Innovators H-419 Submersible Heater

This is one of the workhorses you see on a lot of small farms, and for good reason. The Farm Innovators H-419 is a submersible heater, meaning it sits on the bottom of the tank, out of the way. Its cast aluminum construction makes it incredibly durable and helps it resist corrosion.

At 1500 watts, this unit has the power to keep large tanks (think 100 to 300 gallons) ice-free even in deep freezes. It has a built-in thermostat, so it only kicks on when the water temperature drops toward freezing. This is a crucial feature for managing your electricity bill, as it won’t run 24/7.

The main consideration here is its power draw. A 1500-watt heater needs a dedicated, properly grounded, and preferably GFI-protected circuit. While the cord is tough, you should still run it through a PVC pipe or other conduit if you have particularly destructive animals like pigs or bored goats.

Allied Precision Industries 1500W De-Icer

Allied Precision is another trusted name, and their 1500-watt de-icer is a versatile and reliable option. Many of their models offer the flexibility to be used as either a floating or a submersible heater. This allows you to adapt it to your specific tank and livestock needs.

What sets this one apart is often its focus on safety and efficiency, sometimes incorporating multiple thermostats for redundancy. The finned design you see on many of their models isn’t just for show; it increases the surface area for more efficient heat distribution throughout the tank.

The tradeoff between floating and submersible use is worth considering. A floating heater is easy to see and check, but it can be nudged around by animals and may get trapped in a corner. A submersible unit stays put but is harder to inspect without fishing it out.

K&H Ultimate Stock Tank Deicer with Cord Clip

The K&H Ultimate Deicer is a smart design that solves a common frustration: cord management. It comes with a simple but effective clip that fastens the cord to the edge of the tank. This keeps it from being pulled into the water or becoming a toy for a curious horse.

These de-icers are available in a range of wattages, from 250W up to 1250W. This makes them an excellent choice for smaller tanks or for homesteaders in more moderate climates who don’t need the full force of a 1500W unit. Matching the power to your tank size is key to efficiency.

The build quality is solid, often using cast aluminum or durable plastics depending on the model. Its low-profile design makes it less obtrusive in the tank. This is a great all-around choice, especially for those with plastic or structural foam tanks.

Behlen Country Super-Duty Electric Heater

When you see the name Behlen Country, you think of heavy-gauge steel. Their super-duty heater is no exception. This is the unit you get for a large, permanent galvanized steel stock tank. It’s built to be practically indestructible.

This is a submersible heater designed to sit flat and stable on the tank floor. Its most prominent feature is a heavy-duty metal guard that completely encases the heating element. A cow can step on it, and it won’t miss a beat.

This heater is an investment and likely overkill for a 50-gallon rubber trough. But if you have a large herd watering from a big metal tank and need absolute, set-it-and-forget-it reliability for years, this is the standard to beat.

Brower 15BH Submergible Electric Heater

The Brower 15BH is a testament to simple, effective engineering. It’s a no-frills, submergible heater that has earned a reputation for longevity. You won’t find a lot of fancy features here, just solid performance.

Its construction typically involves a heavy-duty stainless steel element and housing, which provides excellent resistance to corrosion and physical damage. The design is focused on one thing: reliably heating water in harsh conditions. It’s another bottom-dweller, which keeps it safe from animal interference.

Think of the Brower as a long-term utility player. It’s a great choice for homesteaders who value proven technology and want to buy a heater that will likely outlast the tank it’s sitting in. It’s a workhorse, pure and simple.

Farm Innovators DPH-15 Drain Plug De-Icer

This is one of the most innovative designs for anyone using a modern plastic or structural foam stock tank. Instead of dropping a heater in from the top, the DPH-15 replaces the tank’s drain plug. The entire unit installs through the drain hole.

The genius of this design is that the power cord exits from the bottom of the tank. This keeps the cord completely out of the water and away from your animals. It’s arguably the safest and cleanest installation possible, eliminating any risk of chewing or entanglement.

The major caveat is compatibility. You must have a tank with a standard 1.5-inch drain plug opening. It won’t work with metal tanks or older plastic models without this feature. But if your tank is compatible, this is an elegant and incredibly practical solution.

Choosing Your Heater: Power, Safety & Tank Type

Your decision should start with your stock tank.

• Material: A drain plug de-icer only works with specific plastic tanks. A heavy-duty metal heater like the Behlen is best paired with a metal tank.
• Size: A small, 40-gallon tank doesn’t need a 1500W heater. A 250W or 500W K&H model would be far more efficient. Conversely, a 250W unit will be useless in a 300-gallon tank in a Minnesota winter.

Next, consider the power and your climate. A 1500W heater is standard for cold climates and large tanks (over 75 gallons). For smaller tanks or milder winters, a lower-wattage unit will save you a significant amount on your electric bill. Don’t pay for power you don’t need.

Finally, evaluate the safety features in the context of your specific animals. Goats and pigs are notoriously hard on equipment, so a submersible unit with a well-protected cord (or a drain plug model) is essential. For calmer sheep or cattle, a floating unit might be perfectly fine. Always plug your heater into a GFI-protected outlet for everyone’s safety.

Ultimately, the best stock tank heater is the one you don’t have to think about after you install it. Making the right choice upfront saves you from emergency trips to the store, stressed-out animals, and the back-breaking work of chopping ice. It’s an investment that pays dividends in animal health and your own sanity all winter long.

Frequently Asked Questions (FAQs)

What is a heavy duty stock tank heater?

A heavy duty stock tank heater is an electric heating unit built with high wattage and durable metal casing to prevent livestock drinking water from freezing in winter. These units typically draw 1,000 to 1,500 watts of power and feature cast aluminum or stainless steel housings that withstand physical abuse from cattle and horses. Most models include internal thermostats that activate automatically when water temperatures dip below 35 degrees Fahrenheit. Farm operators place them in steel, structural foam, or poly water troughs to ensure continuous fresh water during hard freezes.

What does the thermostat on a heavy duty stock tank heater do?

The thermostat on a heavy duty stock tank heater automatically regulates water temperature by turning the heating element on near freezing and shutting it off once warm. Most built-in thermostats activate when water drops below 35 to 40 degrees Fahrenheit and turn off when the water reaches roughly 50 degrees Fahrenheit. This intermittent cycling keeps water liquid while preventing unnecessary power consumption. If a thermostat fails in the closed position, water can become too hot for livestock to drink, requiring immediate replacement of the heater unit.

How do you install a heavy duty stock tank heater in a drain plug?

Installing a heavy duty drain-plug stock tank heater requires threading the heating unit directly through the tank’s existing bottom drain hole from the inside. First, drain the trough completely and remove the factory drain plug. Next, slide the heater’s threaded brass fitting through the opening, place the rubber gasket firmly against the inner wall, and tighten the locknut on the exterior. Route the electrical cord through conduit to a covered GFCI outlet to keep livestock from damaging the wire.

How do you keep horses from chewing on stock tank heater cords in winter?

Horse owners can stop animals from chewing stock tank heater cords by enclosing the entire power cable inside rigid metal conduit or heavy-duty PVC pipe. Run the conduit straight down the outside of the tank wall, securing it tightly with metal pipe clamps so animals cannot pry it loose. Alternatively, choose a drain-plug heater model where the electrical connection exits through the base outside the trough. Always inspect the cord jacket weekly for tooth marks, cuts, or exposed copper to prevent electrical shock.

Submersible vs floating stock tank heaters which is better for cattle tanks?

Submersible stock tank heaters are generally better for cattle tanks because they sit out of reach at the bottom and resist nudging by curious animals. Cattle frequently flip floating heaters onto the ground or chew through unshielded wiring resting on the water surface. Submersible units rest safely underneath the water line, often protected by an integrated wire guard or heavy cast-iron sinker. For deep tanks holding 100 to 300 gallons, submerged placement distributes heat more evenly from the bottom up.

How much electricity does a 1500 watt stock tank heater use per month?

Operating a 1500 watt stock tank heater consumes approximately 360 to 720 kilowatt-hours of electricity per month depending on winter weather and thermostat run time. At an average residential electric rate of 15 cents per kilowatt-hour, operating costs typically range between $54 and $108 each month. When heaters run continuously during extreme cold snaps below zero, monthly usage can spike to 1,080 kilowatt-hours. Insulating the sides of the stock tank helps reduce heater cycling and lowers total electric consumption.

Why does my heavy duty stock tank heater keep tripping the GFCI outlet?

Water intrusion inside the electrical housing or current leaking through cracked heating elements causes a heavy duty stock tank heater to trip a GFCI outlet. Mineral scale buildup can cause heating elements to overheat and crack, allowing water to touch live internal wiring and ground out. Using a damaged or light-gauge extension cord also causes voltage drops that trip sensitive ground-fault breakers. Unplug the heater immediately, clean off lime scale with vinegar, and test the unit in a separate outlet before returning it to service.

Are heavy duty stock tank heaters safe to use in plastic Rubbermaid tanks?

Heavy duty stock tank heaters are safe for plastic Rubbermaid tanks as long as the heating element includes a built-in protective cage or stand-off guard. Direct contact between bare heating elements and structural foam or poly plastic can melt the container wall and cause leaks. Always verify the manufacturer labels the unit as safe for plastic tanks before installation. Drain-plug models and cast-aluminum base heaters remain the most reliable choices to avoid plastic damage.