Solar energy. The source of Earth's solar power: the Sun. Solar energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.
A general guide to follow for your water line: 1  The average single or 2 family home with 2-4 bathrooms and 2 kitchens, will most likely require a 1â-1 Â¼â copper water line. 2  3 family homes will most likely require a 1 Â½â copper water line.
The size of pipe to be used in a house drain is determined by the number of units drained by it. Proper diameters are: for 2 units, 1 1/2; for 9 units, 2; for 25 units, 2 1/2. The size of any stack, house drain, or sewer must be, however, at least the size of the largest branch connected to it.