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The internationally recognized safe range of whirlpool spa hot tub water temperature is generally 36°C to 40°C, which is the temperature range that most adult users can comfortably and safely withstand: ·36°C: close to normal human body temperature, suitable for long-term soaking, especially for those who are sensitive to heat; ·37~38°C: ideal bathing temperature for most adults, with good relaxation effect; ·39°C~40°C: thermal therapy level temperature, suitable for short-term intensive hydrotherapy, used to relieve deep muscle tension.

-- Most insurance companies, based on standards such as the U.S. Medicare program, determine that only small hot water equipment designed specifically for medical purposes meets the DME standard. Common hot tubs are classified as personal care products, such as massage chairs, saunas, or swimming spas, and do not meet the definition of "medical devices."

Centers for Disease Control and Prevention (CDC) The CDC clearly states: Do not allow children under 5 to use whirlpool spa hot tubs because they cannot dissipate heat effectively and are more sensitive to hot water and chemical treatments.

Acrylic materials are not easily aged or brittle due to long-term contact with hot water or chemicals. During long-term use, whirlpool spa hot tubs are often exposed to hot water, detergents and chemicals. If the material is not resistant to aging, the surface will gradually wear out or become fragile and prone to cracking.

1. If the strict age, supervision, water temperature and strength control are not met, there is a significant risk for children to enter the whirlpool spa hot tub; 2. If they are over 9 years old, weigh close to adults, and are under professional adult supervision, they can use it.

The heater is a vital component in the whirlpool spa hot tub. If the heater itself fails or is damaged, the water temperature cannot be raised to the set value. Common heater failures include: ● Burned heating element ● Heater scale accumulation ● Heater circuit problem

After long-term use, whirlpool spa hot tubs are prone to accumulate scale and soap scum, causing the inner wall of the bathtub to become slippery and even discolored. Baking soda is a mild scrub that can easily wipe away scale without damaging the bathtub material.

If the surface of the bath balls is too smooth or the design is unreasonable, they may be sucked into the spa hot tub filter under the push of the water flow, causing the filter to be blocked, thereby affecting the water purification function.

The water pump is one of the core components of the whirlpool spa hot tub water flow system. If the water pump fails, it may cause the water flow to decrease. Common causes of pump failure include: ● Damage to the pump motor ● Wear of the pump's internal parts Pump power supply problem

There are many methods available on the market to disinfect the water quality of whirlpool spa hot tubs. Here are some common water disinfection methods: 1. Chlorine disinfection 2. Bromine disinfection 3. Ultraviolet disinfection 4. Chlorine dioxide disinfection 5. Salt water electrolysis disinfection

The pH value of water is one of the key indicators affecting water quality. The ideal pH value range should be between 7.2 and 7.8. Too high or too low pH values ​​may cause water quality problems and even damage the components of the whirlpool spa hot tub, especially pipes and nozzles.

When the body is immersed in the spa hot tub, the body temperature rises and the sweat glands begin to secrete sweat, which helps the skin to expel excess oil, dirt and toxins. This process is very beneficial to skin health and can effectively cleanse the skin and reduce greasiness.