this has to do with physics, when it is cool in the air around de wood it makes the atoms get closer because of the cohesion force and that makes it sound..
This is probably due to one of two things. Either the arm coming out the wall needs to be resealed with plumbers thread tape (thin white teflon tape) or where the head goes into the arm it may need a...
to much water flowing through shower valve will cause whistle in pipes.try a new shower head with less flow[gallons per minute]amount should be on head somewhere try 2.5 gpm or less
A shower head is a tool found in the comfort rooms where the water comes out through spraying. There are various types of shower heads. You can try Grohe 28 897 000 Relexa Ultra 5 Spray Patterns Hand...