Yes, it is a good idea to turn off the tankless water heater when away on vacation. This will help save energy and reduce utility costs while no one is using hot water. Additionally, it can also prevent any potential issues or malfunctions that may occur while the home is unoccupied. However, it is important to follow the manufacturer's guidelines for shutting off and restarting the tankless water heater to ensure it is done properly. **

No, water does not flush away calories. While drinking water can help with digestion and metabolism, it does not have the ability to directly flush away calories from the body. Calories are burned through physical activity and the body's natural metabolic processes, not by simply drinking water. It's important to maintain a balanced diet and exercise regularly to manage calorie intake and expenditure. **

No, sparkling water cannot "drain away" in the traditional sense. Like regular water, it can be poured down a drain, but it does not have any special properties that would cause it to drain away differently than still water. However, the carbonation in sparkling water can dissipate over time, so if left open, the bubbles will escape and the water will become flat. **

Vacation can be both stress and relaxation, depending on the individual and the circumstances. For some people, planning and organizing a vacation can be stressful, especially if there are a lot of logistics to consider. However, once on vacation, the change of scenery and break from routine can be very relaxing and rejuvenating. It ultimately depends on the person's mindset and how they choose to approach their vacation. **

Water stains can be difficult to remove, but they can often be treated and minimized. The success of removing water stains depends on the type of surface and the severity of the staining. For example, on fabrics, water stains can often be removed with the appropriate cleaning methods. On hard surfaces like wood or stone, water stains may require more intensive treatment such as sanding or refinishing. It's best to consult with a professional to determine the best course of action for treating water stains. **

When water drains away, it moves from one location to another, typically through a system of pipes, channels, or natural pathways. This movement of water helps to replenish groundwater supplies, nourish plants and ecosystems, and regulate the water cycle. Additionally, as water drains away, it can carry pollutants and debris with it, which can impact water quality and the health of aquatic environments. Overall, the drainage of water plays a crucial role in maintaining the balance of water resources and supporting the natural environment. **

No, the cat did not run away after the vacation. It was safely kept indoors and well taken care of while the owners were away. **

The comet tail points away from the sun because of the solar wind. The solar wind is a stream of charged particles emitted by the sun that pushes the comet's dust and gas away from the sun, creating the tail that always points in the opposite direction of the sun. This phenomenon occurs due to the interaction between the solar wind and the comet's materials, causing them to be pushed in the direction opposite to the sun. **