I have a leak in my old Gas Water Heater.
I am confused because the heater is empty & was wondering why there is no
water constantly running into the Heater.
Is it safe to use a flex line instead of solid pipe to hook up the gas line.
?

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Dell Inspiron
Pentium dual-core 2.2 GHz
2 GB DDR2 SDRAM
Windows Vista Home Premium SP1