How to prevent water pipes from freezing in winter?
Second, emptying is to add an emptying design at the highest and lowest places of the water pipe, and drain the water in the pipe after use, so that it is not afraid of freezing and is suitable for solar energy. The disadvantage is that it wastes water and is very troublesome. Every time you empty it, once you forget it, it is a disaster, and when you use water, you should siphon it.
Third, add electric heating belt, which is the simplest, practical and reliable method at present. Go to plumbing equipment stores or places that sell solar energy, and there are electric heating belts. 3 yuan a meter is cheap, 8 yuan is good, and 20 yuan a meter is expensive. It is recommended to buy 8 yuan, 20 yuan a meter is not bad.
Then buy thermal insulation materials, that is, double-layer thermal insulation cotton, tubular, each about 3 meters, about 10 yuan. Depending on the length of the pipeline you want to freeze, you can buy corresponding meters, and electric heating belts can also be bought by the meter.
Remember to shrink the heat pipe. It is best for the seller to help you waterproof and keep warm at the end of the electric heating belt, that is, put the heat pipe at the end and reheat it, covering the end of the electric heating belt by 2cm.
Then buy wires according to the distance from the water pipe at home to the nearest socket. The maximum electric heating belt is about 8 watts per meter. Therefore, even if the pipeline insulation is 50m, it is enough to use 1.5 square twisted national standard wire. Two dollars is about one meter.
Buy some adhesive tapes, usually made of plastic film, each 35 yuan. And insulating tape and plugs.
That's it. It's easy to go home for construction. Stick the electric heating belt on the water pipe to be insulated from beginning to end, and spirally wind it with adhesive tape to ensure a close fit. When finished, connect the wire with the electric heating belt and wrap it with insulating tape. Connect the plug at the other end of the wire, and then power on the experiment. Generally, the surface of electric heating belt will heat up to more than 40 degrees in the slowest few minutes. Please don't wrap it in insulation cotton until it is normal. Don't tell me it's tubular, it can't be wrapped! Thermal insulation cotton has seams, which can be opened by hand, and then wrapped with tape to ensure that it does not crack.
You're done here. If the weather is below 0 degrees continuously, it will be plugged in all the time. The electric heating belt automatically controls the temperature, so don't worry about overheating. As long as the electric heating belt meets CCC standards, it is safe and reliable. You don't have to worry about investment for at least ten years, and you can wind the tape once every few years at most, which is very worry-free.
If the thermal insulation cotton is better, your construction quality is reliable, and even if there is power failure, you can guarantee that you are not afraid of freezing for 24-72 hours. I helped him find a friend and get a house for his relatives in the countryside, which has always been very reliable and suitable for all exposed water pipes.
If there is no leakage protector at home, you'd better install one.