If water is pouring out of the white colured round tube it means the pressure relief ball has been activated and this is pushed out of the housing and usually straight down the plughole. you cant just by the replacemnet ball you have to but the full pressure relief assembly fof about £20. If it is pouring in a sheet from the base of the water vessel it has cracked and its time to buy a new shower sorry.
phil w, August 2010
