![My hot water heater was making noise so I went down to look at it and saw this. Anyone know what's going on here? : r/whatisthisthing My hot water heater was making noise so I went down to look at it and saw this. Anyone know what's going on here? : r/whatisthisthing](https://preview.redd.it/xiztgzceutt21.jpg?auto=webp&s=5a86b72e7fe7843b923f26d4eecd1c970c345a3a)
My hot water heater was making noise so I went down to look at it and saw this. Anyone know what's going on here? : r/whatisthisthing
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