wrote:

[snip]

increasing the pressure will no doubt increase the risks for leaks....

since the problem is just one shower.

does the shower head have a flow restrictor in it?

is poor flow just hot or just cold?

could be a clogged shower head, galvanized generates particles of rust
that can clog things.

bad shower valve somehow?

My shower has been slow, because of a deteriorated washer in the hot water
valve. Bits of rubber would break off and got stuck in the shower head.

--
Mark Lloyd
http://notstupid.us

"Making fun of born-again Christians is like hunting dairy cows with a
high powered rifle and scope." -- P.J. O'Rourke