Merry Christmas
Teflon stainless.
Here in Northern Colorado we have expansive clay soil. The floor of the basement can move inches up or down.
Infact our basement walles are directly attached to the ceiling but are floating on pins in the floor. There is about a 4 inch gap. And the base molding it attached to the bottom are but not the wall so when things move the molding doesn't rip nails out. Framing Basement Walls - How To Build Floating Walls
Without the flex line the water heater could rip the copper out of the ceiling
Teflon stainless.
Here in Northern Colorado we have expansive clay soil. The floor of the basement can move inches up or down.
Infact our basement walles are directly attached to the ceiling but are floating on pins in the floor. There is about a 4 inch gap. And the base molding it attached to the bottom are but not the wall so when things move the molding doesn't rip nails out. Framing Basement Walls - How To Build Floating Walls
Without the flex line the water heater could rip the copper out of the ceiling