Yes, pouring boiling water directly down your garbage disposal can damage internal components. Extreme thermal shock from boiling water can warp or crack plastic housing parts, degrade rubber splash guards, soften PVC drain pipes, and damage internal seals. Furthermore, if you have recently poured grease down the drain (which you should never do), boiling water can melt the grease temporarily, allowing it to flow further down your pipes before solidifying into a worse clog. Verification: Use warm or cold water instead of boiling water when operating and cleaning your disposal.
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