There are two types of water heaters, those below 16 liters are rated 4 points, and those above 16 liters are rated 6 points. Generally, two angle valves, two stainless steel water pipes, and one air pipe are required.
The exhaust pipe of the water heater must be connected to the outside, otherwise people will be killed. This cannot be careless, remember it! ! !
If you are in Shenzhen, we can install it at your door.