It was installed in 2001, and it is still used very well so far
The two-way plug is used to prevent the water pipes from freezing and heating in winter
< p>Usually not used at allI have never seen other bolts
There is nothing special about using this thing
It is very simple
You need to pay attention to the hot and cold water pipes of second-hand house water heaters. Over time, they are prone to minor problems. However, Tsinghua Sunshine provides lifelong maintenance and the after-sales service is very good. Among the two plugs, my home does not have three-phase ones. , the two-phase thing is what I said above! The instructions for use are quite clear!
Wish the host a happy life