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Ok, I finally got back to working on the water heater. The tube that goes into the hole is rusty, so I wirebrushed the rust off as best I could. Problem is, the screw that holds the air shutter in place is also rusted down. Is it ok to use a penetrant to try and loosen it up? Seeing as how it's so close to where the flame will be, I wasn't sure if it was a good idea to be spraying flammable penetrating oil there, though I will certianly try not to use any more than necessary.
(Of course, it's not lit now, I'm just worried about residule on the tube after I get the shutter moving and want to light it again.)
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Stephanie
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