The methods to avoid replacement of ppr pipe joint in case of water leakage are: 1. Stop the water first, 2. Wipe dry with a dry rag. Clean the leaking place with a knife. Use electric ferrochrome to melt the leaking place (you can burn it with other iron without electric soldering iron), 5. Mix the bought A&B glue according to the ratio of 2: 1, 6. Mix A&B glue. After 30 minutes, turn on the main switch of1/5.1/4.1/3, and then turn on 1/2 after checking that there is no water leakage at all. It was fully open the next day. good