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I'm considering to replace a stop-and-waste valve in the basement, where copper pipes are installed. So I need to clean the corrosion off the pipe. My question is if I could use fine-grained sandpaper instead of emery cloth (since I see it is normally recommended), is there a big difference between the two?

Thanks.

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    I've used coarse steel wool, and 3m sanding mats in a pinch. Just about anything abrasive would work IMO. – BrownRedHawk Aug 11 '16 at 17:34
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Sure. Emery cloth is better able to handle moisture and repeated flex due to scrubbing. Otherwise, they'll both do the job.

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Sure. I have used a flat blade screwdriver as a scraper to remove the worst corrosion. In a pinch that was sufficient to revive a dead car. Also, I used the same technique to rejoin some copper pipe where a joint failed from bad soldering and I didn't have any 220 grit sandpaper to do a better job under duress.

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