Recent water hammer in shower

[Lbjgh]

In the last two years water hammer has gotten really bad in my main bathroom tub/shower. This occurs when the diverter at the tub is activated to turn on the shower. There is a loud BANG everytime.

I assume the straps on the copper pipes have worked themselves loose. The house is almost 30 years old and all of the walls around the bathroom are finished even below. There is no access to the pipes without a messy renovation

I was considering getting some low expanding foam used for window installations and spraying that into the wall cavity from the shower fixture side to help secure the pipes.

Do you guys think that would help?

 

[Jeff H Young]

Sure it might work if strapps would fix it expanding foam likely would. Ill tell you what though Im never lucky enough to just put a strap on and problem disappears. but if thats the sole cause yes.
How high is the pressure?

 

[Sponsor]

 

[Lbjgh]

Sure it might work if strapps would fix it expanding foam likely would. Ill tell you what though Im never lucky enough to just put a strap on and problem disappears. but if thats the sole cause yes.
How high is the pressure?

We have lower pressure here... likely 50-60psi