Hotboxes are commonly used in commercial pressure washing for things like grease removal or cleaning industrial surfaces. If you are reading this, you either made the first step and purchased a Hotbox for your business or you are doing some research beforehand. Read through this guide to learn everything you need to know about correctly setting up, plumbing, and prepping your hotbox for it's first use.

Tools & Materials Needed:

1. Pressure Washer (cold water model)
2. Hotbox Heater (often propane, diesel, or natural gas-powered)
3. Hoses (hot water-rated hoses for inlet and outlet)
4. Water Supply (fresh water source)
5. Fuel Source (propane, natural gas, or diesel, depending on the Hotbox model)
6. Temperature Controls (most Hotboxes come with adjustable temperature controls)
7. Safety Gear (gloves, goggles, boots)
8. Water Filter (optional, to ensure clean water)

Step-by-Step Guide:

1. Choose the Right Hotbox

• Ensure your Hotbox is compatible with your pressure washer. It should be rated for the same pressure output and water flow rate.
• If using a cold-water pressure washer, confirm that the Hotbox is designed to heat the water to a high enough temperature (typically between 120°F - 200°F).

2. Set Up the Hotbox

• Position the Hotbox: Find a stable, flat surface near your pressure washer and fuel source (if applicable). The Hotbox will need to be in a place where it can safely vent gases (if it's a propane or natural gas model).
• Connect the Fuel Source:
  • If you’re using propane, attach the propane tank to the Hotbox, following the manufacturer’s instructions.
  • If it’s natural gas, you’ll need to have a gas line installed.
  • If it runs on diesel, set up the diesel tank and connect it to the Hotbox as per the guide. Note: most diesel hotboxes will come fitted with a diesel tank already, if so, skip this step.
• Check for Leaks: Always check for fuel or gas leaks using a soapy water solution (you should see bubbles forming if there's a leak). Never skip this step. Note: Do not put the soap solution into the fuel tank, only on the exterior of fuel lines, surfaces below the tank, etc.

3. Plumb the Water Connections

• Water Inlet: Connect your water supply to the water inlet of the Hotbox from the pressure washer. This is where the cold water enters to be heated. Generally, a whip line is used for this.
• Water Outlet: Connect the outlet of the Hotbox to the inlet of your hose reel (If applicable).
• Hoses: Use high-temperature rated hoses for both inlet and outlet to avoid melting or damage from the hot water. Make sure they are securely tightened to prevent leaks.

4. Set the Desired Temperature

• Turn on the Hotbox. Most models come with a thermostat or temperature gauge. Set it to the desired temperature, usually between 120°F to 200°F depending on the cleaning task.
• Check the water temperature with a thermometer if needed. Keep in mind that higher temperatures can improve cleaning performance but may damage some surfaces if not used correctly.

5. Start the Pressure Washer

• With everything connected, turn on your pressure washer and allow it to run. The Hotbox will begin to heat the water as it flows through, and you’ll now have hot water at the nozzle.
• Adjust the pressure washer settings based on the cleaning needs (low pressure for delicate surfaces, high pressure for tough dirt).

6. Monitor the Hotbox While in Use

• While operating, monitor the Hotbox to ensure that the water is heating correctly and there are no issues with pressure or temperature.
• Keep an eye on the fuel source (propane or gas) to ensure it doesn’t run out during use.
• If there’s a safety shutdown feature on your Hotbox, follow the instructions to reset if needed.
• Don't panic: You may see a cloud of smoke coming from the hotbox, this is generally a normal step in the hotbox heating process. While it may be intimidating, it is often normal. Verify there is no fire, the smoke is not a dark color (It should generally be white), and you do not smell any fire or fuel. We highly recommend keeping a fire extinguisher on hand.

7. Shut Down and Maintenance

• When you're done using the Hotbox, shut down the heater, pressure washer, and fuel source (if applicable).
• Let the Hotbox cool down before storing it.
• Regularly clean the system by flushing the water lines with clean water to prevent any scale buildup, especially if you’re using hard water.
• Check the fuel supply, hoses, and connections for wear or damage after each use.

Important Tips & Safety Considerations:

• Never use a Hotbox without proper ventilation. Gas or propane-powered units should always be used in well-ventilated outdoor areas to prevent the buildup of dangerous gases like carbon monoxide.
• Check the pressure washer before use to ensure it is rated for hot water. Some pressure washers may overheat or get damaged if hot water is used.
• Temperature Control: Be careful not to exceed the recommended temperature settings for the surfaces you're cleaning. Hot water can damage paint, wood, or delicate materials.
• Fuel Safety: Keep fuel sources away from the Hotbox and away from direct heat to prevent fires.

Conclusion:

Setting up a pressure washing Hotbox is fairly straightforward but requires proper safety measures and correct equipment. With the right setup, you can enhance your pressure washing efficiency, achieving better cleaning results, especially for tough stains. Always refer to the manufacturer’s instructions for the specific Hotbox and pressure washer models you are using to ensure safe and effective operation. For quality hotboxes to consider, we have all the options you need at Livingston Spray Company.