If your shower fails to produce any water flow while the nearby bathroom sink operates with normal pressure, the restriction is strictly localized to the shower plumbing. Common causes include a clogged or jammed pressure-balancing cartridge inside the shower mixing valve, closed service stops behind the access panel, or heavy mineral scale accumulation blocking the showerhead. Verification: Unscrew the showerhead and check the pipe arm; if water flows from the open pipe, the showerhead or cartridge is the bottleneck.
1 votes
Marked as accepted