Every time I flush a toilet or drain a bathtub or sink from either of the two bathrooms on my second floor, I hear "cracking" noises from the PVC drain pipes. It is very loud at the beginning of the water draining and then tapers off near the end of the draining. This noise has been going on for months. It happens all the time. There are no water leaks It's just that the PVC pipes make "cracking" noises for lack of a better description of the noise.
My two questions are
1. What causes the noise?
2. How can I eliminate the noise?
Thanx in advance for any advice offered.
My two questions are
1. What causes the noise?
2. How can I eliminate the noise?
Thanx in advance for any advice offered.