try WD40

來源: RomaVacation 於 2024-10-29 12:54:42 [] [舊帖] [給我悄悄話] 閱讀數 : (514 bytes)

or disconnect at upstream connector. (get ready to turn whole house water valve in case water valve to water heater is not good enough.)

As for the initial question you asked, not sure if there is still pressure at hot water pipe in the whole house. You did not tell history. 

Catridge could mix hot and cold water slightly. In other words, you may still get water (cold) coming out of your hot water tab when you turned off waterline into hot water heater. 

 

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