I have a EC4 Rainsoft water treatment system. The water was off several days from damaged water line. After repairs the water pressure to the bath shower was strong and after several minutes it drop considerably. Any solutions would be appreciated.

Single handle shower control? Damaged line repair would lead me to believe debris from the repaired line got into the cartridge for the shower. Other faucets OK? I would pull the cartridge and clean out the ports. Flush water through before putting the cartridge back.

Agree with what's advised in the previous post. Debris that got loose inside the pipe during the repair traveled to the shower. Besides cleaning cartridge and entry ports, also, remove shower head and clean flow reducer and the filter screen inside.

Milo