Operating a low pressure boiler without proper maintenance poses a significant risk of leaks and explosions. Regular maintenance is crucial for ensuring that all components of the boiler—such as valves, seals, and safety devices—are functioning correctly. Without it, wear and tear can lead to malfunctions that might compromise the integrity of the system. For instance, scale buildup or corrosion can weaken the structure, and failure to regularly check safety controls can prevent proper shut-off in dangerous situations. This lack of maintenance increases the likelihood of pressurized steam or water escaping. Such leaks can not only lead to hazardous situations but also pose a catastrophic risk of explosion if the pressure reaches critical levels or if flammable materials are present. The other options do not accurately represent the consequences of poor maintenance. Lower fuel consumption, increased operational efficiency, and improvement in air quality suggest benefits that might arise from well-maintained systems, but they are not relevant to the hazards associated with neglecting maintenance.