4 to 6 points.
The water lines of solar water heaters have 4 and 6 point pipes. Most of them are 4 point pipes. They are now talking about diameter, which is diameter 16, and the diameter of the PPR. is 20. When installing, the appropriate one should be selected according to the size of the water outlet pipes to be installed.
Generally speaking, a 42-tube solar water heater can bathe 7 to 10 people. The number of people who can take a bath is mainly related to the capacity of the solar water tank and the water temperature. The water tank has a large capacity and can provide a large amount of hot water; the solar water tank has high water temperature and can provide enough hot water with more cold water. Under normal circumstances, the average daily hot water consumption per person in a household is approximately 50 liters and 45 degrees Celsius. Different brands of solar water heaters have very different ratios of vacuum tubes and water tanks, as well as the heat collection efficiency of the vacuum tubes and the rate of water temperature rise.