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  • How did you diagnose? CCTV?

    9" angle grinder, lump hammer & bolster, and various digging things.

    It wouldn't have been possible to get any cameras into the drain, as it was all ceramic & cemented in place (including the grill / cover).

    I'd still have dug it up in any case - It's the only way you'll get to really see what is going on.

  • Fuck knows what the ceramic stuff is made off too - cutting through it makes plenty of silicate dust. But also sparks. And something melty.

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