ST. LOUIS — With potentially extreme winter weather conditions comes a significant risk to boiler fuel delivery systems and water lines serving your heating equipment. Proper winterization is essential to prevent freeze-related damage, service interruptions, fuel leaks and costly repairs.

Natural gas, propane and No. 2 fuel oil are the most prevalent fuel sources for dry cleaners. The following guidance outlines best practices for these systems, as well as associated water lines, to ensure safe and reliable operation during cold conditions.

Natural gas itself does not freeze under normal atmospheric conditions. However, moisture, regulators, meters and piping components are vulnerable to freezing.

Snow and ice accumulation around meters and regulators can obstruct pressure regulation and venting. All gas meters and regulators should be kept clear of snow, ice and debris, with vent openings unobstructed at all times.

Exposed piping should be inspected for proper support and protection from physical damage caused by snow loads or ice buildup. In extremely cold climates, insulating exposed gas piping and installing approved heat tracing where permitted can help prevent regulator freeze-up. Periodic inspections during prolonged cold spells are critical to detect frost buildup or abnormal operation.

Propane is more susceptible to cold-weather performance issues because vaporization decreases as temperatures drop.

Underground tanks generally perform better in winter, but above-ground tanks must be sized appropriately to meet cold-weather demand. Tanks should be kept at adequate fill levels, as low propane volume increases the risk of pressure loss and regulator freeze-up. Regulators should be protected with weather covers designed by the manufacturer, and vent openings must remain clear.

Exposed propane lines should be insulated and supports checked to prevent movement due to frost heave. Where allowed, heat tracing may be installed on vulnerable sections, but open flames or unapproved heating devices must never be used.

No. 2 fuel oil can gel at low temperatures, restricting flow and potentially shutting down heating equipment. To prevent gelling, winter-grade fuel or approved anti-gel additives should be used before cold weather begins. Fuel tanks, lines and filters located outdoors or in unheated spaces should be insulated.

Fuel lines should be kept as short as practical and routed through heated spaces when possible. Filters should be inspected and replaced regularly, as wax buildup can occur even with additives. Emergency generators and standby boilers using fuel oil should be tested periodically during winter to confirm reliable operation.

Water lines supplying boilers and fire-protection interfaces are highly vulnerable to freezing. All exposed water piping must be insulated, especially near exterior walls, crawl spaces and unheated mechanical rooms. Heat tracing with thermostatic control is recommended for critical lines. Valves, backflow preventers and pressure-reducing devices should receive additional protection, as these components freeze more readily. In facilities with intermittent occupancy, maintaining minimum indoor temperatures and allowing controlled water circulation can further reduce freeze risk.

With proper preparation, you should be able to manage winter storms. Know that effective winterization of fuel and water systems is your best defense. It requires proactive planning, routine inspection, and adherence to manufacturer and code requirements. By addressing vulnerabilities before cold weather arrives, your drycleaning operation can reduce the risk of freeze-related failures, protect life safety systems and ensure uninterrupted heating throughout the winter season.

As you prepare your boilers for the storm, please also be aware that ice poses a significant threat. Take notice of slip-and-fall exposures for the protection of your customers and your team members.

Note: This guidance is provided for general informational purposes and does not replace manufacturer instructions or applicable codes.