The Aqua Hot Fuel Pressure Gauge Tool is used to test the fuel pressure using the nozzle stand. It's recommended in use with the Control Box Tester. Aqua Hot systems are designed to make your RV lifestyle more comfortable by offering a quiet, fume-free system that produces even, moist heat and continuous hot water on-demand. Aqua Hot Heating• Even heat distribution with no hot or cold spots• 5° temperature difference from floor to ceiling• Warms bay areas to prevent pipes and tanks from freezing• No loss of humidity• Moist, comfortable heating• Even temperature control• Burner in bay or cargo area Aqua Hot systems produce even, moist heat & continuous hot water on-demand | Aqua Hot Fuel Pressure Gauge Kit