hot water tank

: Why wont the pilot light stay lit. am not a gas fitter………..but it sounds like the thermal coupling. Best you get a licenced person in to fix it, gas explosions kill a lot of people each yrDISCLAIMERAll advice is given with-out seeing the job, and hence all advice MUST be taken as advice with limited knowledge on the exact situation. NO responsibility can or will be taken. And yes, I am a licensed plumber with my own business in Brisbane Australia

Could be a weak thermocouple, is the end of the t-couple smooth. Is the flame hitting the last 1/2 to 3/8s of an inch of the thermocouple? You can check the millivolt output of the t-couple with a volt meter set to dc volts, if output is lower than 20 millivolts replace thermocouple, or adjust the flame position……Lou