• Trojan 66B LP gas stock tank heater, part 15000, blue powder coated steel casing with adjustable tank mounting brackets
  • Inside the Trojan 66B casing showing the Robertshaw gas control valve, brass fittings and burner assembly
  • Trojan 66B stock tank heater side view with the hinged chimney lid open and the adjustable mounting bracket extended
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Trojan 66B LP Gas Stock Tank Heater with Kit 15000

Trojan 66B LP Gas Stock Tank Heater with Kit 15000

Part Number 15000

$1,396.04 USD
$1,662.80 USD $1,396.04 USD
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The Trojan 66B is a thermostatically controlled stock tank heater that runs on LP gas instead of electricity, so it keeps livestock water open in remote pastures and at troughs where there is no power. A natural gas conversion kit, part 14435, is sold separately.

The 66B has a powder coated heavy steel casing and a control and burner assembly built to stay lit and lift out easily for servicing. Adjustable brackets mount it to most metal, poly, wood and concrete tanks, and it holds a 3 to 5 foot radius of drinkable water open around the heater.

  • Heat output: 12,400 BTU per hour, thermostatically controlled
  • Fuel: LP gas, convertible to natural gas with kit 14435
  • Average run time: about 30 days on a 100 lb LP tank
  • Open water: 3 to 5 foot radius around the heater
  • Size and weight: 35 inches tall, 8 1/2 inches in diameter, 49 lbs
  • Mounting: adjustable brackets for metal, poly, wood and concrete tanks
  • Controls: AGA listed automatic safety controls with thermocouple shutoff

This unit includes the Trojan Propane Hook-Up Kit, SKU 50000. The 66B must be installed with the low pressure, nonadjustable regulator that comes in that kit.

COMES COMPLETE

This heater arrives with everything you need to hook it up, including the Trojan Propane Hook-Up Kit and the low pressure regulator. There are no other accessories to buy.

Installation tip: mount the 66B leaning slightly forward so condensation runs off the top instead of collecting inside the casing.

Features

  • 12,400 BTU every hour if needed
  • No gasket to melt or leak
  • Long-lasting heavy steel casing
  • Control and burner assembly easily removed for servicing
  • UPS Shippable
  • AGA listed automatic control for safe operation
  • Easy to light and stays lit in the winter
  • Adjustable brackets fit most steel, wood, poly or concrete tanks

Additional Accessories And Considerations

Need parts or a full rebuild?

• Complete Burner Assembly for 66B

• Robertshaw Unitrol 7000SLC (post-2017)

• Propane Hookup Kit

View full details

How the 66B works (quick technical overview)

The 66B’s thermostatic gas control modulates heat to keep an opening in the ice. The combustion chamber sits under a boot in the tank, warming water locally; automatic safety controls (AGA-listed) help ensure safe operation while maintaining water access for livestock.

Frequently Asked Questions

Does the 66B work without electricity?

Yes. It runs on LP or Natural Gas and is designed for remote locations or where grid power is limited.

How much water will it keep open?

The 66B holds a 3 to 5 foot radius of open water around the boot. Wind, tank size and air temperature move that number, so a windbreak or a tank cover will stretch it.

What comes in Kit #15000?

The package comes with the 66B heater + hookup kit (propane hookup kit), along with the powder-coated casing and the removable control/burner assembly.

What gas control does the 66B use?

Modern assemblies (post-2017) use the Robert Shaw (Robertshaw) Unitrol 7000SLC. If you’re replacing a control, verify your assembly style (top vs. side knob) and manufacture date for compatibility.

How long will a propane tank last?

A common benchmark: ~30 days on a 100-lb LP tank, but run-time varies by climate, wind exposure, and setpoint.

Is the burner easy to service?

Yes. The control & burner assembly is designed to be removed for servicing, and adjustable brackets make it useful on multiple stock tank designs.

Is there an installation manual?

Yes—Trojan publishes a User’s Manual & Troubleshooting Guide with gas hookup notes, regulator placement, moisture purge, and bulb/line protection guidance which is included in the package.

Is the 66B AGA-Listed

Yes, it uses an AGA-listed automatic control for safe operation.

Can I install it myself?

Yes! Follow the official manual and local gas codes; many producers install it themselves, but professional installation is recommended where required.

What’s included with #15000 vs. other SKUs?

Part #15000 is the complete kit: the Trojan 66B heater plus the Trojan Propane Hook-Up Kit, SKU 50000, with hose and low pressure regulator. The heater is also sold on its own without the hook-up kit, so check the part number before you order.

Installation: step-by-step highlights

Always follow the official manual and local code. The summary below highlights recurring best-practice points from Trojan resources.

  1. Unbox & identify parts (heater body, burner/control, hookup kit, brackets).
  2. Mount to tank using the adjustable brackets; keep the unit slightly leaning forward to shed condensation.
  3. Gas hookup: Regulator typically within ~7 ft; connect flexible hose from regulator to heater fitting. Blow out lines to purge moisture before connecting.
  4. Protect the hose assembly and sensing bulb from livestock damage (routing and shielding).
  5. Lighting: Follow the burner lighting procedure (Trojan has video quick-guides).
  6. Verify operation: Confirm flame stability, thermostat response, and water opening growth over the first 24–48 hours.

Winter storage & maintenance: When not in use, turn off gas, remove the heater, and store the burner assembly dry—do not wrap the Unitrol in plastic.

Common troubleshooting (fast fixes)

  • Won’t stay lit → Check regulator placement, purge moisture, confirm adequate LP level, inspect thermocouple/sensing bulb routing and draft exposure.
  • Insufficient open water → Evaluate wind exposure, boot position, thermostat setting, and fuel supply; confirm brackets and forward lean for condensation runoff.
  • Aging controls → Post-2017 assemblies may use Unitrol 7000SLC; verify control style before ordering replacement.

Parts & upgrades frequently paired with the 66B

  • Complete Burner Assembly (for rebuilds and older units)
  • Robert Shaw / Robertshaw Unitrol 7000SLC (post-2017 gas control)
  • Pilot assemblies, hoses, regulators, hookup kits (propane)

For a complete list of available replacement parts for your 66B, visit our parts list.

Feature Trojan 66B (Kit #15000) Electric Stock Tank De-icer
Power Source LP or Natural Gas (no electricity required) 120V or 240V AC electricity
Energy Independence Fully off-grid, ideal for remote locations Requires nearby electrical service
Operating Cost Low propane or natural gas usage Dependent on electricity rates
Heating Capacity ~12,400 BTU/hr; opens ~3–5 ft radius Typically 250–1500 watts; localized heating
Climate Suitability Mild to extreme winter conditions to -30 degrees F. Mild to moderate winter use
Maintenance Annual check of burner, control, and hoses Inspect cord and element for corrosion
Installation Mounts to tank; connect LP/NG line, adjust brackets Submersible; drop-in plug-and-play setup
Ideal For Livestock tanks in remote pastures with no power Barns or near-grid installations